WO2014181741A1 - Terminalized wire - Google Patents

Terminalized wire Download PDF

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Publication number
WO2014181741A1
WO2014181741A1 PCT/JP2014/061977 JP2014061977W WO2014181741A1 WO 2014181741 A1 WO2014181741 A1 WO 2014181741A1 JP 2014061977 W JP2014061977 W JP 2014061977W WO 2014181741 A1 WO2014181741 A1 WO 2014181741A1
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WO
WIPO (PCT)
Prior art keywords
terminal
hole
round terminal
core wire
electric wire
Prior art date
Application number
PCT/JP2014/061977
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French (fr)
Japanese (ja)
Inventor
隼士 飯塚
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矢崎総業株式会社
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Publication date
Application filed by 矢崎総業株式会社 filed Critical 矢崎総業株式会社
Publication of WO2014181741A1 publication Critical patent/WO2014181741A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/28—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wire processing before connecting to contact members, not provided for in groups H01R43/02 - H01R43/26
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12—End pieces terminating in an eye, hook, or fork
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/023—Soldered or welded connections between cables or wires and terminals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/02—Cable terminations

Definitions

  • This invention relates to the terminal-ized electric wire which shape
  • the present applicant has also proposed in the past that the end portion of the core wire is formed into a round terminal shape by heat compression (patent) Reference 1).
  • the above-described conventional terminalized electric wires can reduce the number of terminals as components, and also eliminate the need to devise a means of coupling the terminals to the core wire so that the contact resistance value does not increase. It is better than the combined wire with terminal.
  • the core wire is softened and compressed by heating, even a terminal having a through hole at the center such as a round terminal can be easily formed integrally.
  • JP-A-4-249875 JP H04-249875 A
  • the end portion of the core wire is compressed by the male and female press electrodes, and at the same time, the core wire is heated and softened by energization between both electrodes.
  • the contact area with the object to which the terminal is attached changes, resulting in a variation in the contact resistance value.
  • the contact resistance value also varies.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to stabilize a contact resistance value with an object in a terminalized electric wire in which a terminal is integrally formed at an end of a core wire by molding by heat compression. It is in providing the terminal-ized electric wire which can do.
  • a terminalized electric wire includes a flat terminal integrally formed at the end of a core wire by molding by heat compression, and a bulge formed on at least one of both flat surfaces of the terminal. And a contact portion that comes into contact with the mounting surface of the object in a state of being fixed to the object.
  • the contact part is in a position different from the place where the burr can be formed In the state where the contact portion is in contact with the mounting surface of the object, the burr is separated from the mounting surface and does not come into contact. Further, if the contact portion is in a place where burrs can be formed, the burrs are absorbed by the bulge forming portion of the contact portion, so that the burrs are formed separately from the contact portions and do not contact the mounting surface of the object.
  • the terminal plane does not contact the mounting surface of the object, but is a contact formed by bulging from the terminal plane. Only the part contacts the mounting surface.
  • the contact resistance value with the object can be stabilized when the terminal is integrally formed at the end of the core wire by molding by heat compression to form a terminalized electric wire.
  • the terminal is provided with a through-hole penetrating both planes, the terminal is fixedly attached to the object by fastening bolts inserted through the through-holes, and the contact portions are concentric with the through-holes and are respectively erected on both planes of the terminal
  • a boss may be provided.
  • the boss on the other plane that does not contact the mounting surface of the object is a bolt head inserted into the through hole of the terminal, a nut used in combination with the bolt, or a washer inserted between them and the terminal. And prevent direct contact with their terminal planes. For this reason, it can prevent that a terminal deform
  • the terminal has a through-hole penetrating both planes, the terminal is fixedly attached to the object by fastening bolts inserted through the through-holes, and the contact portion is erected at equal intervals on at least one of both planes of the terminal.
  • it may be configured with three or more contacts.
  • the contact resistance value with the object can be stabilized.
  • FIG. 1 is a side view of a terminalized electric wire according to the first embodiment.
  • FIG. 2 is a perspective view of the terminalized wire of FIG. 1 as viewed from above.
  • FIG. 3 is an explanatory diagram of a forming process of the terminalized electric wire of FIG. 4 is a cross-sectional view showing a state of electrodes, jigs, and core wires during resistance welding in the forming step of FIG.
  • FIG. 5 is a perspective view of the terminalized electric wire according to the second embodiment.
  • the terminalized electric wire according to the first embodiment will be described with reference to FIGS.
  • the terminalized electric wire 1 is formed by integrally forming a flat round terminal 5 at a tip portion of a core wire 3 as a terminal, and the round terminal 5 is shown in FIG. 2. As shown, it has a through-hole 5a that penetrates both front and back surfaces (both planes). Moreover, as shown in FIG. 1, the boss
  • the round terminal 5 is formed by removing the insulating coating 7 of the terminalized electric wire 1 and bending the exposed end portion of the core wire 3 into a ring shape and molding it by heat compression. Molding by heating and compression of the tip portion of the core wire 3 folded in an annular shape can be performed, for example, by resistance welding.
  • the insulating coating 7 on the tip portion of the terminalized electric wire 1 is removed, and the exposed tip portion of the core wire 3 is folded back in an annular shape. Then, a hole forming jig 15 a having an outer diameter corresponding to the inner diameter of the through hole 5 a of the round terminal 5 is inserted into the folded portion 3 a of the core wire 3, and the folded portion of the core wire 3 is inserted into the outer shape of the round terminal 5. It arrange
  • the state in which the upper electrode 15d and the lower electrode 15e are pressed into contact with the folded portion of the core wire 3 is the state shown in the sectional view of FIG. In this state, the upper end of the hole forming jig 15a protruding from the folded portion 3a of the core wire 3 is inserted into the escape hole 15f of the upper electrode 15d, and the lower end is inserted into the escape hole 15g of the lower electrode 15e.
  • an annular recess 15h concentric with the escape hole 15g is formed around the escape hole 15g of the lower electrode 15e.
  • An annular recess 15i having the same diameter as the annular recess 15h is also formed around the escape hole 15f of the upper electrode 15d.
  • the folded portion 3a of the core wire 3 is softened by Joule heat, and the hole forming jig 15a and the concave portion 15c of the wire holding jig 15b.
  • the outer shape of the space defined by the upper electrode 15d and the lower electrode 15e is formed. This space has a shape corresponding to the outer shape of the round terminal 5, and after molding, the round terminal 5 having the shape shown in FIGS.
  • a molding die including a hole forming jig 15 a, an electric wire pressing jig 15 b, an upper electrode 15 d, and a lower electrode 15 e is used for forming the round terminal 5.
  • an insulating or high resistance material having a melting temperature higher than that of the core wire 3 is used for the hole forming jig 15a and the wire pressing jig 15b.
  • the softened material of the core wire 3 may wrap around a slight gap between the escape hole 15g of the lower electrode 15e and the hole forming jig 15a, for example.
  • the material that has entered the gap remains as burrs along the peripheral edge of the through-hole 5a on the back surface of the round terminal 5 after molding. After molding, the presence of burrs and deburring work are performed. It will be necessary to remove.
  • the annular recess 15h formed in the lower electrode 15e is formed with a depth larger than the dimension when a burr is formed, and the back surface of the round terminal 5 is The higher boss 5b is formed to bulge.
  • the annular recess 15i of the upper electrode 15d is also formed with the same depth.
  • the terminalized electric wire 1 in which the round terminal 5 is integrally formed at the distal end portion of the core wire 3 is attached and fixed to the object 9 in which the attachment hole 9a is formed in the attachment surface 9b as shown in FIG. .
  • the attachment hole 9a of the object 9 has a female screw (not shown).
  • the male screw portion 11a of the bolt 11 inserted through the through hole 5a of the round terminal 5 is screwed into the female screw of the mounting hole 9a.
  • the head 11 b of the bolt 11 abuts against the boss 5 b on the surface of the round terminal 5 via the washer 13.
  • the round terminal 5 can be attached and fixed to the object 9.
  • the boss 5 b on the back surface of the round terminal 5 abuts on the mounting surface 9 b of the object 9.
  • the surface and the back surface of the round terminal 5 are targeted. There is no direct contact with the mounting surface 9b of the object 9.
  • the contact area of the round terminal 5 with respect to the mounting surface 9b of the object 9 is made constant by the area of the tip portion of the boss 5b, and burrs are generated when the round terminal 5 is molded, and the surface of the round terminal 5 Even if the surface roughness of the back surface is different from the design value, the contact resistance value with the object 9 does not change.
  • the contact resistance value with the object 9 can be stabilized when the round terminal 5 is integrally formed at the distal end portion of the core wire 3 by molding by resistance welding to form the terminalized electric wire 1.
  • the boss 5b is formed so as to bulge out at the portion where burrs are generated during molding on the front and back surfaces of the round terminal 5, the burrs are absorbed by the boss 5b. For this reason, it is possible to prevent the burr from contacting the mounting surface 9b of the object 9 and changing the contact resistance value with the object 9 separately from the boss 5b.
  • the boss 5b may be provided upright on at least the back surface of the round terminal 5, and the boss 5b on the front surface may be omitted. However, if the bosses 5b are erected on both the front and back surfaces of the round terminal 5, no matter which direction the boss 5b is attached to the mounting surface 9b of the target object 9 The contact resistance value with the object 9 can be stabilized by contacting the mounting surface 9b.
  • the contact portion 5c instead of the boss 5b, three contact portions 5c are equidistantly arranged concentrically with the through-hole 5a on the front and back surfaces of the round terminal 5A as in the round terminal 5A of the second embodiment shown in FIG. May be provided.
  • the contact portion 5c also has three hemispherical recesses (not shown) corresponding to the contact portions 5c formed in the upper electrode 15d and the lower electrode 15e, whereby the core wire 3 is folded back.
  • the round terminal 5 is formed by forming a portion, it can be bulged at the same time.
  • the contact portion 5c is provided on the round terminal 5A, only the contact portion 5c is provided in the state in which the round terminal 5A is attached and fixed to the object 9, similarly to the boss 5b of the round terminal 5 of the first embodiment. Since it contacts the mounting surface 9b, the contact resistance value with the object 9 can be stabilized regardless of the presence or absence of burrs and the surface roughness of the back surface of the round terminal 5A.
  • contact portions 5c may be provided at equal intervals, and the contact portions 5c may be provided not only on the back surface but also on the front surface of the round terminal 5A.
  • the position where the boss 5b and the contact portion 5c are provided may be close to the outer peripheral surface of the round terminals 5 and 5A, or close to the through hole 5a. Furthermore, you may further provide the contact part 5c of 2nd Embodiment with the boss
  • the object 9 for mounting and fixing the round terminals 5 and 5 ⁇ / b> A by fastening using the bolts 11 has been described.
  • a terminalized electric wire to which the present invention is applied can also be used in the case of an object to which a round terminal is attached and fixed via an adapter, such as a battery post of a vehicle.
  • the shape of a terminal is not limited to a round shape, For example, square shape etc. Any shape can be selected according to the application purpose.
  • the present invention is extremely useful when applied to a terminalized electric wire in which a flat terminal is integrally formed at the end of a core wire by molding by heat compression.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
  • Processing Of Terminals (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

This terminalized wire (1) comprises a round terminal (5) that has a through-hole (5a) in the middle thereof and is integrally formed at the tip of a core wire (3) via resistance welding performed by running current between electrodes between which a tip section of the core wire (3) has been crimped, said tip section having been folded over so as to form a ring. When forming said round terminal (5), bosses (5b) are formed on the top and bottom surfaces thereof, said bosses (5a) being concentric with the aforementioned through-hole (5a). To mount and affix the round terminal (5) to an object (9), a male threaded section (11a) of a bolt (11) inserted through the through-hole (5a) is screwed into female threads in an attachment hole (9a) in said object (9), thereby fastening the round terminal (5) to the object (9). This makes the boss (5b) on the bottom surface of the round terminal (5) abut against the attachment surface (9b) of the object (9), preventing the contact area between the round terminal (5) and said attachment surface (9b) from varying.

Description

端子化電線Terminalized wire
　本発明は、電線の芯線の端部を成形して、端子を芯線に一体に形成した端子化電線に関する。 This invention relates to the terminal-ized electric wire which shape | molded the edge part of the core wire of an electric wire, and formed the terminal integrally with the core wire.
　電線の芯線を成形して、端子を芯線に一体形成した端子化電線に関しては、本出願人も過去に、芯線の端部を加熱圧縮により丸型端子形状に成形する提案を行っている（特許文献１参照）。 Regarding the terminalized electric wire in which the core wire is formed and the terminal is integrally formed with the core wire, the present applicant has also proposed in the past that the end portion of the core wire is formed into a round terminal shape by heat compression (patent) Reference 1).
　上述した従来例の端子化電線は、部品としての端子を削減できる他、接触抵抗値が増加しないように端子を芯線に結合する工夫が不要になる等の点で、芯線に別体の端子を結合した端子付き電線よりも優れている。また、加熱により芯線を軟化させて圧縮するので、丸型端子のような中心に貫通孔を有する端子でも、容易に一体形成することができる。 The above-described conventional terminalized electric wires can reduce the number of terminals as components, and also eliminate the need to devise a means of coupling the terminals to the core wire so that the contact resistance value does not increase. It is better than the combined wire with terminal. In addition, since the core wire is softened and compressed by heating, even a terminal having a through hole at the center such as a round terminal can be easily formed integrally.
特開平４－２４９８７５号公報(JP H04-249875 A)JP-A-4-249875 (JP H04-249875 A)
　加熱圧縮による成形で端子を芯線に一体に形成する際には、雄型と雌型のプレス電極で芯線の端部を圧縮すると同時に、両電極間の通電により芯線を加熱し軟化させる。このとき、軟化して雄型と雌型とのわずかな隙間に回り込んだ芯線材料がバリとなって残ると、端子を取り付ける対象物との接触面積が変わり、接触抵抗値の変動をもたらす。成形型の表面粗さにより端子の面粗度が低下する場合も、同様に接触抵抗値の変動が生じる。 When forming the terminal integrally with the core wire by molding by heat compression, the end portion of the core wire is compressed by the male and female press electrodes, and at the same time, the core wire is heated and softened by energization between both electrodes. At this time, if the core wire material that has softened and wraps around a slight gap between the male mold and the female mold remains as burrs, the contact area with the object to which the terminal is attached changes, resulting in a variation in the contact resistance value. When the surface roughness of the terminal is lowered due to the surface roughness of the mold, the contact resistance value also varies.
　本発明は前記事情に鑑みなされたもので、本発明の目的は、加熱圧縮による成形で端子を芯線の端部に一体形成した端子化電線において、対象物との接触抵抗値を安定化させることができる端子化電線を提供することにある。 The present invention has been made in view of the above circumstances, and an object of the present invention is to stabilize a contact resistance value with an object in a terminalized electric wire in which a terminal is integrally formed at an end of a core wire by molding by heat compression. It is in providing the terminal-ized electric wire which can do.
　上記目的を達成するため、本発明の態様に係る端子化電線は、加熱圧縮による成形で芯線の端部に一体形成した扁平な端子と、端子の両平面の少なくとも一方に膨出形成され、端子を対象物に取付固定した状態で対象物の取付面に当接する接点部とを備える。 In order to achieve the above object, a terminalized electric wire according to an aspect of the present invention includes a flat terminal integrally formed at the end of a core wire by molding by heat compression, and a bulge formed on at least one of both flat surfaces of the terminal. And a contact portion that comes into contact with the mounting surface of the object in a state of being fixed to the object.
　このような構成により、成形後の端子を対象物に取付固定すると、端子に形成した接点部のみが対象物の取付面に当接し、接点部以外の端子部分は対象物の取付面から離間し接触しなくなる。 With such a configuration, when the molded terminal is attached and fixed to the object, only the contact portion formed on the terminal abuts on the attachment surface of the object, and the terminal portion other than the contact portion is separated from the attachment surface of the object. It stops touching.
　したがって、加熱により軟化した芯線材料が端子の成形時に成形型の合わせ目の隙間に回り込み、成形後の端子にバリとなって残っても、接点部がバリのできる箇所とは異なる位置にあれば、接点部が対象物の取付面に当接した状態でバリは取付面から離間して接触しない。また、接点部がバリのできる箇所にあれば、接点部の膨出形成部分にバリが吸収されるので、バリが接点部とは別に形成されて対象物の取付面に接触することはない。 Therefore, even if the core material softened by heating goes around the gap of the molding die at the time of molding the terminal and remains as a burr on the molded terminal, if the contact part is in a position different from the place where the burr can be formed In the state where the contact portion is in contact with the mounting surface of the object, the burr is separated from the mounting surface and does not come into contact. Further, if the contact portion is in a place where burrs can be formed, the burrs are absorbed by the bulge forming portion of the contact portion, so that the burrs are formed separately from the contact portions and do not contact the mounting surface of the object.
　さらに、成形型の表面粗さによって端子の平面が設計値とは異なる面粗度となっても、端子の平面は対象物の取付面に当接せず、端子の平面から膨出形成した接点部のみが取付面に当接する。 Furthermore, even if the surface of the terminal has a surface roughness different from the design value due to the surface roughness of the molding die, the terminal plane does not contact the mounting surface of the object, but is a contact formed by bulging from the terminal plane. Only the part contacts the mounting surface.
　このため、端子の成形時にバリが発生したり端子の平面の面粗度が設計値とは異なっても、そのせいで対象物との接触抵抗値が変動することはない。 For this reason, even when burrs are generated during molding of the terminal or the surface roughness of the flat surface of the terminal is different from the design value, the contact resistance value with the object does not fluctuate.
　よって、加熱圧縮による成形で端子を芯線の端部に一体形成し端子化電線とするのに当たり、対象物との接触抵抗値を安定化させることができる。 Therefore, the contact resistance value with the object can be stabilized when the terminal is integrally formed at the end of the core wire by molding by heat compression to form a terminalized electric wire.
　端子は両平面を貫通する貫通孔を備え、端子は貫通孔に挿通したボルトの締結により対象物に取付固定され、接点部は貫通孔と同心円状に端子の両平面にそれぞれ立設された筒状のボスを備えてもよい構成されてもよい。 The terminal is provided with a through-hole penetrating both planes, the terminal is fixedly attached to the object by fastening bolts inserted through the through-holes, and the contact portions are concentric with the through-holes and are respectively erected on both planes of the terminal A boss may be provided.
　端子の両平面にそれぞれ接点部としてのボスが立設されているので、どちらの平面を対象物の取付面に対向させてもどちらかの平面のボスが取付面に当接することになる。このため、端子を対象物にどちら向きで取付固定しても安定した接触抵抗値を対象物との間で得ることができる。 Since the bosses as contact portions are erected on both planes of the terminal, the boss on either plane comes into contact with the mounting surface regardless of which plane faces the mounting surface of the object. For this reason, a stable contact resistance value can be obtained between the terminal and the object regardless of which direction the terminal is attached and fixed to the object.
　また、対象物の取付面に当接しないもう一方の平面のボスは、端子の貫通孔に挿通したボルトの頭部やボルトと併用するナット、あるいは、それらと端子との間に挿入される座金に当接し、それらの端子平面への直接の接触を阻止する。このため、ボルトの締結時にその締め付け力で端子が変形し、そのせいで対象物との接触抵抗値が変化するのを防ぐことができる。 In addition, the boss on the other plane that does not contact the mounting surface of the object is a bolt head inserted into the through hole of the terminal, a nut used in combination with the bolt, or a washer inserted between them and the terminal. And prevent direct contact with their terminal planes. For this reason, it can prevent that a terminal deform | transforms with the clamping force at the time of fastening of a volt | bolt, and, thereby, changes a contact resistance value with a target object.
　端子は両平面を貫通する貫通孔を備え、端子は貫通孔に挿通したボルトの締結により対象物に取付固定され、接点部は端子の両平面の少なくとも一方に同心円上に等間隔で立設された３つ以上の接点を備えて構成されてもよい。 The terminal has a through-hole penetrating both planes, the terminal is fixedly attached to the object by fastening bolts inserted through the through-holes, and the contact portion is erected at equal intervals on at least one of both planes of the terminal. Alternatively, it may be configured with three or more contacts.
　本発明の態様にによれば、加熱圧縮による成形で端子を芯線の端部に一体形成した端子化電線において、対象物との接触抵抗値を安定化させることができる。 According to the aspect of the present invention, in the terminalized electric wire in which the terminal is integrally formed at the end portion of the core wire by molding by heat compression, the contact resistance value with the object can be stabilized.
図１は、第１実施形態に係る端子化電線の側面図である。FIG. 1 is a side view of a terminalized electric wire according to the first embodiment. 図２は、図１の端子化電線を上方から見た斜視図である。FIG. 2 is a perspective view of the terminalized wire of FIG. 1 as viewed from above. 図３は、図１の端子化電線の成形工程の説明図である。FIG. 3 is an explanatory diagram of a forming process of the terminalized electric wire of FIG. 図４は、図３の成形工程における抵抗溶接中における電極、治具、芯線の状態を示す断面図である。4 is a cross-sectional view showing a state of electrodes, jigs, and core wires during resistance welding in the forming step of FIG. 図５は、第２実施形態に係る端子化電線の斜視図である。FIG. 5 is a perspective view of the terminalized electric wire according to the second embodiment.
　以下、本発明の実施形態について図面を参照して説明する。なお、説明に用いる各図面の寸法や寸法比は、実際のものとは異なる場合がある。以下の図面で示すのは、あくまで本発明の実施形態の概念である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the dimension and dimension ratio of each drawing used for description may differ from an actual thing. What is shown in the following drawings is only a concept of the embodiment of the present invention.
　図１―４を参照して、第１実施形態に係る端子化電線について説明する。 The terminalized electric wire according to the first embodiment will be described with reference to FIGS.
　図１に示すように、第１実施形態に係る端子化電線１は、芯線３の先端部分に扁平な丸型端子５を端子として一体に形成したもので、丸型端子５は、図２に示すように、表裏両面（両平面）を貫通する貫通孔５ａを中心に有している。また、丸型端子５の表裏両面には、図１に示すように、貫通孔５ａと同心円状に形成されたボス５ｂが接点部として立設されている。 As shown in FIG. 1, the terminalized electric wire 1 according to the first embodiment is formed by integrally forming a flat round terminal 5 at a tip portion of a core wire 3 as a terminal, and the round terminal 5 is shown in FIG. 2. As shown, it has a through-hole 5a that penetrates both front and back surfaces (both planes). Moreover, as shown in FIG. 1, the boss | hub 5b formed concentrically with the through-hole 5a is standingly arranged by the contact part as shown in FIG.
　丸型端子５は、端子化電線１の絶縁被覆７を除去して露出させた芯線３の先端部分を環状に折り返して、加熱圧縮により成形することで形成される。環状に折り返した芯線３の先端部分の加熱圧縮による成形は、例えば、抵抗溶接によって行うことができる。 The round terminal 5 is formed by removing the insulating coating 7 of the terminalized electric wire 1 and bending the exposed end portion of the core wire 3 into a ring shape and molding it by heat compression. Molding by heating and compression of the tip portion of the core wire 3 folded in an annular shape can be performed, for example, by resistance welding.
　図３に示すように、丸型端子５を形成するための抵抗溶接では、端子化電線１の先端部分の絶縁被覆７を除去して、露出させた芯線３の先端部分を環状に折り返す。そして、芯線３の折り返し部分３ａに、丸型端子５の貫通孔５ａの内径に対応する外径の孔形成治具１５ａを挿通し、さらに、芯線３の折り返し部分を、丸型端子５の外形に対応する電線押さえ治具１５ｂの凹部１５ｃに配置する。この状態で、上電極１５ｄと下電極１５ｅを芯線３の折り返し部分に上下から圧接させる。 As shown in FIG. 3, in resistance welding for forming the round terminal 5, the insulating coating 7 on the tip portion of the terminalized electric wire 1 is removed, and the exposed tip portion of the core wire 3 is folded back in an annular shape. Then, a hole forming jig 15 a having an outer diameter corresponding to the inner diameter of the through hole 5 a of the round terminal 5 is inserted into the folded portion 3 a of the core wire 3, and the folded portion of the core wire 3 is inserted into the outer shape of the round terminal 5. It arrange | positions to the recessed part 15c of the electric wire holding | suppressing jig 15b corresponding to. In this state, the upper electrode 15d and the lower electrode 15e are pressed against the folded portion of the core wire 3 from above and below.
　芯線３の折り返し部分に上電極１５ｄと下電極１５ｅを圧接させた状態が、図４の断面図に示す状態である。この状態では、芯線３の折り返し部分３ａから突出する孔形成治具１５ａの上端を上電極１５ｄの逃がし穴１５ｆに、下端を下電極１５ｅの逃がし穴１５ｇにそれぞれ挿入させている。図３に示すように、下電極１５ｅの逃がし穴１５ｇの周囲には、逃がし穴１５ｇと同心円状の環状凹部１５ｈが形成されている。上電極１５ｄの逃がし孔１５ｆの周囲にも、環状凹部１５ｈと同径の環状凹部１５ｉが形成されている。 The state in which the upper electrode 15d and the lower electrode 15e are pressed into contact with the folded portion of the core wire 3 is the state shown in the sectional view of FIG. In this state, the upper end of the hole forming jig 15a protruding from the folded portion 3a of the core wire 3 is inserted into the escape hole 15f of the upper electrode 15d, and the lower end is inserted into the escape hole 15g of the lower electrode 15e. As shown in FIG. 3, an annular recess 15h concentric with the escape hole 15g is formed around the escape hole 15g of the lower electrode 15e. An annular recess 15i having the same diameter as the annular recess 15h is also formed around the escape hole 15f of the upper electrode 15d.
　そして、電源（不図示）により上電極１５ｄと下電極１５ｅとの間を通電させると、芯線３の折り返し部分３ａがジュール熱で軟化し、孔形成治具１５ａ、電線押さえ治具１５ｂの凹部１５ｃ、上電極１５ｄ、下電極１５ｅで画成される空間の外形に成形される。この空間は、丸型端子５の外形に対応する形状を有しており、成形後には、図１、２に示す形状の丸型端子５が芯線３の先端部分に一体形成される。 When the upper electrode 15d and the lower electrode 15e are energized by a power source (not shown), the folded portion 3a of the core wire 3 is softened by Joule heat, and the hole forming jig 15a and the concave portion 15c of the wire holding jig 15b. The outer shape of the space defined by the upper electrode 15d and the lower electrode 15e is formed. This space has a shape corresponding to the outer shape of the round terminal 5, and after molding, the round terminal 5 having the shape shown in FIGS.
　即ち、丸型端子５の形成には、孔形成治具１５ａ、電線押さえ治具１５ｂ、上電極１５ｄ、下電極１５ｅで構成される成形型が用いられる。なお、孔形成治具１５ａや電線押さえ治具１５ｂには、芯線３よりも溶融温度が高い絶縁又は高抵抗材料を使用する。 That is, for forming the round terminal 5, a molding die including a hole forming jig 15 a, an electric wire pressing jig 15 b, an upper electrode 15 d, and a lower electrode 15 e is used. Note that an insulating or high resistance material having a melting temperature higher than that of the core wire 3 is used for the hole forming jig 15a and the wire pressing jig 15b.
　上述した成形の際には、軟化した芯線３の材料が、例えば、下電極１５ｅの逃がし穴１５ｇと孔形成治具１５ａとのわずかな隙間に回り込む可能性がある。この隙間に回り込んだ材料は、成形後の丸型端子５の裏面に、貫通孔５ａの周縁部に沿ったバリとなって残り、成形後にバリの有無の検査や、バリ取り作業を行って除去する必要が生じてしまう。 In the above-described molding, the softened material of the core wire 3 may wrap around a slight gap between the escape hole 15g of the lower electrode 15e and the hole forming jig 15a, for example. The material that has entered the gap remains as burrs along the peripheral edge of the through-hole 5a on the back surface of the round terminal 5 after molding. After molding, the presence of burrs and deburring work are performed. It will be necessary to remove.
　そこで、第１実施形態の丸型端子５では、下電極１５ｅに形成した環状凹部１５ｈを、バリが形成される場合の寸法よりも大きい深さで形成し、丸型端子５の裏面に、バリよりも高いボス５ｂが膨出形成されるようにする。なお、図３では図示を省略しているが、第１実施形態では、図４に示すように、上電極１５ｄの環状凹部１５ｉも同じ深さで形成している。 Therefore, in the round terminal 5 of the first embodiment, the annular recess 15h formed in the lower electrode 15e is formed with a depth larger than the dimension when a burr is formed, and the back surface of the round terminal 5 is The higher boss 5b is formed to bulge. Although not shown in FIG. 3, in the first embodiment, as shown in FIG. 4, the annular recess 15i of the upper electrode 15d is also formed with the same depth.
　このようにして、芯線３の先端部分に丸型端子５を一体形成した端子化電線１は、図１に示すように、取付孔９ａを取付面９ｂに形成した対象物９に取付固定される。対象物９の取付孔９ａは雌ねじ（不図示）を有している。取付孔９ａの雌ねじには、丸型端子５の貫通孔５ａに挿通したボルト１１の雄ねじ部１１ａが螺着される。 In this way, the terminalized electric wire 1 in which the round terminal 5 is integrally formed at the distal end portion of the core wire 3 is attached and fixed to the object 9 in which the attachment hole 9a is formed in the attachment surface 9b as shown in FIG. . The attachment hole 9a of the object 9 has a female screw (not shown). The male screw portion 11a of the bolt 11 inserted through the through hole 5a of the round terminal 5 is screwed into the female screw of the mounting hole 9a.
　ボルト１１の頭部１１ｂは、座金１３を介して、丸型端子５の表面のボス５ｂに当接する。この状態でボルト１１を締結することで、丸型端子５を対象物９に取付固定することができる。このとき、対象物９の取付面９ｂには、丸型端子５の裏面のボス５ｂが当接する。そして、丸型端子５の成形時に、貫通孔５ａの周縁部に沿って丸型端子５の裏面にバリが形成されても、バリよりも高い丸型端子５の裏面のボス５ｂが対象物９の取付面９ｂに当接するので、バリが取付面９ｂに当接することはない。 The head 11 b of the bolt 11 abuts against the boss 5 b on the surface of the round terminal 5 via the washer 13. By fastening the bolt 11 in this state, the round terminal 5 can be attached and fixed to the object 9. At this time, the boss 5 b on the back surface of the round terminal 5 abuts on the mounting surface 9 b of the object 9. When the round terminal 5 is molded, even if a burr is formed on the back surface of the round terminal 5 along the peripheral edge of the through hole 5a, the boss 5b on the back surface of the round terminal 5 higher than the burr is the object 9. Therefore, the burr does not come into contact with the mounting surface 9b.
　また、例えば、上電極１５ｄと下電極１５ｅの端面の表面粗さにより、丸型端子５の表面や裏面が設計値と異なる面粗度となっても、丸型端子５の表面や裏面が対象物９の取付面９ｂに直接接触することはない。 Further, for example, even if the surface roughness and the back surface of the round terminal 5 have different surface roughness from the design values due to the surface roughness of the end surfaces of the upper electrode 15d and the lower electrode 15e, the surface and the back surface of the round terminal 5 are targeted. There is no direct contact with the mounting surface 9b of the object 9.
　このため、対象物９の取付面９ｂに対する丸型端子５の接触面積が、ボス５ｂの先端部分の面積で一定化し、丸型端子５の成形時にバリが発生したり丸型端子５の表面や裏面の面粗度が設計値とは異なっても、そのせいで対象物９との接触抵抗値が変化することがない。 For this reason, the contact area of the round terminal 5 with respect to the mounting surface 9b of the object 9 is made constant by the area of the tip portion of the boss 5b, and burrs are generated when the round terminal 5 is molded, and the surface of the round terminal 5 Even if the surface roughness of the back surface is different from the design value, the contact resistance value with the object 9 does not change.
　よって、抵抗溶接による成形で丸型端子５を芯線３の先端部分に一体形成し端子化電線１とするのに当たり、対象物９との接触抵抗値を安定化させることができる。 Therefore, the contact resistance value with the object 9 can be stabilized when the round terminal 5 is integrally formed at the distal end portion of the core wire 3 by molding by resistance welding to form the terminalized electric wire 1.
　なお、丸型端子５の表面や裏面のうち、成形時にバリが発生する箇所にボス５ｂが膨出形成されるようにすれば、バリがボス５ｂに吸収される。このため、ボス５ｂとは別にバリが対象物９の取付面９ｂに接触して対象物９との接触抵抗値が変化するのを、防止することができる。 In addition, if the boss 5b is formed so as to bulge out at the portion where burrs are generated during molding on the front and back surfaces of the round terminal 5, the burrs are absorbed by the boss 5b. For this reason, it is possible to prevent the burr from contacting the mounting surface 9b of the object 9 and changing the contact resistance value with the object 9 separately from the boss 5b.
　また、ボス５ｂは丸型端子５の少なくとも裏面に立設されていればよく、表面のボス５ｂは省略してもよい。しかし、丸型端子５の表面と裏面に両方ともボス５ｂを立設すれば、対象物９の取付面９ｂに丸型端子５をどちら向きで取付固定しても、どちらかのボス５ｂを必ず取付面９ｂに当接させて、対象物９との接触抵抗値を安定させることができる。 Further, the boss 5b may be provided upright on at least the back surface of the round terminal 5, and the boss 5b on the front surface may be omitted. However, if the bosses 5b are erected on both the front and back surfaces of the round terminal 5, no matter which direction the boss 5b is attached to the mounting surface 9b of the target object 9 The contact resistance value with the object 9 can be stabilized by contacting the mounting surface 9b.
　さらに、ボス５ｂに代えて、図５に示す第２実施形態の丸型端子５Ａのように、３つの接点部５ｃを丸型端子５Ａの表面や裏面に、貫通孔５ａと同心円状に等間隔で設けてもよい。この接点部５ｃも、ボス５ｂを設ける場合と同様に、各接点部５ｃに対応する半球状の３つの凹部（不図示）を上電極１５ｄや下電極１５ｅに形成することで、芯線３の折り返し部分の成形により丸型端子５を形成する際に、同時に膨出形成することができる。 Further, instead of the boss 5b, three contact portions 5c are equidistantly arranged concentrically with the through-hole 5a on the front and back surfaces of the round terminal 5A as in the round terminal 5A of the second embodiment shown in FIG. May be provided. Similarly to the case where the boss 5b is provided, the contact portion 5c also has three hemispherical recesses (not shown) corresponding to the contact portions 5c formed in the upper electrode 15d and the lower electrode 15e, whereby the core wire 3 is folded back. When the round terminal 5 is formed by forming a portion, it can be bulged at the same time.
　丸型端子５Ａに接点部５ｃを設ける場合にも、丸型端子５Ａを対象物９に取付固定した状態で、第１実施形態の丸型端子５のボス５ｂと同様に、接点部５ｃのみが取付面９ｂに当接するので、バリの有無や丸型端子５Ａの裏面の面粗度に関係なく、対象物９との接触抵抗値を安定させることができる。 Even when the contact portion 5c is provided on the round terminal 5A, only the contact portion 5c is provided in the state in which the round terminal 5A is attached and fixed to the object 9, similarly to the boss 5b of the round terminal 5 of the first embodiment. Since it contacts the mounting surface 9b, the contact resistance value with the object 9 can be stabilized regardless of the presence or absence of burrs and the surface roughness of the back surface of the round terminal 5A.
　なお、接点部５ｃを４つ以上等間隔で設けてもよく、丸型端子５Ａの裏面だけでなく表面にも接点部５ｃを設けてもよい。 Note that four or more contact portions 5c may be provided at equal intervals, and the contact portions 5c may be provided not only on the back surface but also on the front surface of the round terminal 5A.
　また、ボス５ｂや接点部５ｃを設ける位置は、丸型端子５，５Ａの外周面寄りでもよく、貫通孔５ａ寄りでもよい。さらに、第１実施形態の丸型端子５の表面や裏面、あるいは、どちらか一方の面に、ボス５ｂと共に第２実施形態の接点部５ｃをさらに設けてもよい。その場合は、ボス５ｂと接点部５ｃとの位置が重ならないように、ボス５ｂの径と接点部５ｃを配置する貫通孔５ａの同心円の径とを異ならせるのが好ましい。 Further, the position where the boss 5b and the contact portion 5c are provided may be close to the outer peripheral surface of the round terminals 5 and 5A, or close to the through hole 5a. Furthermore, you may further provide the contact part 5c of 2nd Embodiment with the boss | hub 5b in the surface of the round terminal 5 of 1st Embodiment, the back surface, or any one surface. In that case, it is preferable that the diameter of the boss 5b and the diameter of the concentric circle of the through hole 5a in which the contact portion 5c is arranged are different so that the positions of the boss 5b and the contact portion 5c do not overlap.
　また、上述した実施形態では、ボルト１１を用いた締結によって丸型端子５，５Ａを取付固定する対象物９について説明した。しかし、例えば車両のバッテリポストのように、アダプタを介して丸型端子を取付固定する対象物の場合にも、本発明を適用した端子化電線を用いることができる。 Further, in the above-described embodiment, the object 9 for mounting and fixing the round terminals 5 and 5 </ b> A by fastening using the bolts 11 has been described. However, for example, a terminalized electric wire to which the present invention is applied can also be used in the case of an object to which a round terminal is attached and fixed via an adapter, such as a battery post of a vehicle.
　また、各実施形態では、加熱圧縮による成形で芯線の端部に一体形成される端子について、丸型端子を例にして説明したが、端子の形状は丸型に限定されず、例えば四角形状など、応用の用途に従い任意の形状を選択することができる。 Moreover, in each embodiment, although the terminal integrally formed in the edge part of a core wire by shaping | molding by heat compression was demonstrated taking the case of the round terminal, the shape of a terminal is not limited to a round shape, For example, square shape etc. Any shape can be selected according to the application purpose.
　本発明は、加熱圧縮による成形で扁平な端子を芯線の端部に一体形成した端子化電線に適用して極めて有用である。 The present invention is extremely useful when applied to a terminalized electric wire in which a flat terminal is integrally formed at the end of a core wire by molding by heat compression.

Claims (3)

  1. 　端子化電線であって、
    　加熱圧縮による成形で芯線の端部に一体形成した扁平な端子と、
    　前記端子の両平面の少なくとも一方に膨出形成され、前記端子を対象物に取付固定した状態で前記対象物の取付面に当接する接点部と
    を備えることを特徴とする端子化電線。     A terminalized wire,
    A flat terminal integrally formed at the end of the core wire by molding by heating and compression;
    A terminalized electric wire comprising: a contact portion that bulges on at least one of both flat surfaces of the terminal and contacts the mounting surface of the object in a state where the terminal is mounted and fixed to the object.
  2. 　請求項１記載の端子化電線であって、
    　前記端子は、前記両平面を貫通する貫通孔を備え、
    　前記端子は、前記貫通孔に挿通したボルトの締結により、前記対象物に取付固定され、
    　前記接点部は、前記貫通孔と同心円状に前記端子の前記両平面にそれぞれ立設された筒状のボスを備えて構成されている
    ことを特徴とする端子化電線。     The terminalized electric wire according to claim 1,
    The terminal includes a through hole penetrating the both planes,
    The terminal is fixedly attached to the object by fastening a bolt inserted through the through hole,
    The said contact part is provided with the cylindrical boss | hub provided by standing on the both said planes of the said terminal concentrically with the said through-hole, respectively, The terminal-ized electric wire characterized by the above-mentioned.
  3. 　請求項１又は２記載の端子化電線であって、
    　前記端子は、前記両平面を貫通する貫通孔を備え、
    　前記端子は、前記貫通孔に挿通したボルトの締結により、前記対象物に取付固定され、
    　前記接点部は、前記端子の前記両平面の少なくと一方に同心円上に等間隔で立設された３つ以上の接点を備えて構成されている
    ことを特徴とする端子化電線。     The terminalized electric wire according to claim 1 or 2,
    The terminal includes a through hole penetrating the both planes,
    The terminal is fixedly attached to the object by fastening a bolt inserted through the through hole,
    The terminal-connected electric wire is characterized in that the contact portion is configured to include three or more contacts erected at equal intervals on a concentric circle on at least one of the two planes of the terminal.
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