JP5902414B2 - Manufacturing method of terminal crimped wire - Google Patents

Manufacturing method of terminal crimped wire Download PDF

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JP5902414B2
JP5902414B2 JP2011173014A JP2011173014A JP5902414B2 JP 5902414 B2 JP5902414 B2 JP 5902414B2 JP 2011173014 A JP2011173014 A JP 2011173014A JP 2011173014 A JP2011173014 A JP 2011173014A JP 5902414 B2 JP5902414 B2 JP 5902414B2
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terminal
crimped
core wire
crimping
electric wire
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JP2013037886A (en
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文恵 日野
文恵 日野
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Yazaki Corp
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Yazaki Corp
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Priority to PCT/JP2012/004946 priority patent/WO2013021602A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H01R4/184—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
    • 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

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Description

本発明は、端子圧着電線に関する。   The present invention relates to a terminal crimped electric wire.

従来、端子圧着電線としては、複数本の導体からなる芯線部と、この芯線部の外周を覆う被覆部とを備え、被覆部から露出する芯線部に端子の加締め部としてのワイヤーバレルが加締められて導通されるものが知られている（例えば、特許文献１参照）。   2. Description of the Related Art Conventionally, a terminal crimped electric wire has a core wire portion composed of a plurality of conductors and a covering portion covering the outer periphery of the core wire portion, and a wire barrel as a terminal crimping portion is added to the core wire portion exposed from the covering portion. What is fastened and made conductive is known (see, for example, Patent Document 1).

この端子圧着電線では、複数本の導体からなる芯線部を一対の治具で挟んで超音波振動を与え、表面が粗化された粗化領域を形成させている。そして、粗化領域にワイヤーバレルを加締めることによって、酸化膜などの被膜が剥がされ、芯線部の新生面同士が互いに接触し、電線と端子との間の電気抵抗を低下させている。   In this terminal crimped electric wire, a core wire portion made up of a plurality of conductors is sandwiched between a pair of jigs, and ultrasonic vibration is applied to form a roughened region with a roughened surface. Then, by caulking the wire barrel in the roughened region, the coating such as an oxide film is peeled off, the new surfaces of the core wire portion are in contact with each other, and the electrical resistance between the electric wire and the terminal is reduced.

特開２０１１−８２１２７号公報JP 2011-82127 A

ところで、上記のような端子圧着電線では、芯線部が複数本の導体からなり、この芯線部に端子の加締め部を加締めている。このように芯線部が複数本の導体からなる場合には、導体１本１本の間に隙間があるので、芯線部が加締め部によって加締められるときに加締め部に掛かる接触圧力が緩和される。   By the way, in the terminal crimping electric wire as described above, the core wire portion is composed of a plurality of conductors, and the crimped portion of the terminal is crimped to the core wire portion. In this way, when the core wire portion is composed of a plurality of conductors, there is a gap between each conductor, so that the contact pressure applied to the caulking portion is reduced when the core wire portion is caulked by the caulking portion. Is done.

しかしながら、芯線部が１本の導体からなる場合には、加締め部による芯線部の加締めの際に、加締め部に掛かる荷重が分散し難くなっている。このため、端子の加締め部において、接触圧力の高い部分と低い部分との差があり、高温や低温などの環境変化によって、特に接触圧力の高い部分でクリープが発生して接触圧力が低下するなど、加締め部で十分な接触圧力を確保することが困難であった。   However, when the core wire portion is made of one conductor, the load applied to the caulking portion is difficult to disperse when the core wire portion is caulked by the caulking portion. For this reason, there is a difference between the high contact pressure portion and the low contact portion in the crimped portion of the terminal, and due to environmental changes such as high temperature and low temperature, creep occurs particularly in the high contact pressure portion and the contact pressure decreases. For example, it has been difficult to secure a sufficient contact pressure at the caulking portion.

そこで、この発明は、１本の導体からなる芯線部におけるクリープの発生を抑制することができる端子圧着電線の提供を目的としている。   Then, this invention aims at provision of the terminal crimping electric wire which can suppress generation | occurrence | production of the creep in the core part which consists of one conductor.

請求項１記載の発明は、１本の導体からなる芯線部と、この芯線部の外周を覆う被覆部とを備え、前記被覆部から露出する前記芯線部に端子の加締め部が加締められて導通される端子圧着電線の製造方法であって、前記芯線部は、前記端子の加締め部に加締められる前の状態で、外周形状が前記加締め部を加締めた状態の内周形状と略同一形状に形成され、前記加締め部は、互いの端部を当接して前記芯線部を挟み込む一対の狭持部を有し、前記芯線部には、前記一対の狭持部の端部を配置させる凹部が設けられることを特徴とする。 The invention according to claim 1 includes a core wire portion made of one conductor and a covering portion that covers an outer periphery of the core wire portion, and a crimp portion of a terminal is crimped to the core wire portion exposed from the covering portion. a method of manufacturing a terminal crimping electric wires to be conductive Te, the core part, the state before being crimped crimping portion of the terminal, the inner peripheral shape of the state where the outer peripheral shape caulked the crimp portion The caulking portion has a pair of holding portions that abut against each other and sandwich the core portion, and the core portion includes ends of the pair of holding portions. and wherein the recess for arranging the parts are al provided.

この端子圧着電線では、端子の加締め部に加締められる前の状態で、芯線部の外周形状が加締め部を加締めた状態の内周形状と略同一形状に形成されているので、加締め部を芯線部に加締めるときに加締め部における接触圧力が均等化され、芯線部におけるクリープの発生を抑制して接触圧力が低下する部分を減少させることができる。   In this terminal crimped electric wire, the outer peripheral shape of the core wire portion is formed in substantially the same shape as the inner peripheral shape of the crimped portion in a state before being crimped to the crimped portion of the terminal. When the fastening portion is crimped to the core wire portion, the contact pressure in the crimping portion is equalized, and the occurrence of creep in the core wire portion can be suppressed to reduce the portion where the contact pressure decreases.

従って、このような端子圧着電線では、１本の導体からなる芯線部におけるクリープの発生を抑制することができ、接触抵抗の増加を抑制することができる。
また、この端子圧着電線では、芯線部に一対の狭持部の端部を配置させる凹部が設けられているので、加締め部において一番接触圧力が高くなる一対の狭持部の端部が位置する部分の接触圧力の上昇を緩和することができ、加締め部における接触圧力をより均等化することができる。 Therefore, in such a terminal crimped electric wire, it is possible to suppress the occurrence of creep in the core portion made of one conductor, and to suppress an increase in contact resistance.
Moreover, in this terminal crimped electric wire, since the recessed part which arrange | positions the edge part of a pair of clamping part in the core wire part is provided, the edge part of a pair of clamping part in which a contact pressure becomes the highest in a crimping part is provided. It is possible to mitigate an increase in the contact pressure at the position where the contact portion is located, and it is possible to further equalize the contact pressure at the caulking portion.

請求項２記載の発明は、請求項１記載の端子圧着電線の製造方法であって、前記芯線部は、前記端子の加締め部に加締められる前の状態で、外周径が前記加締め部を加締めた状態の内周径より大きく設定されることを特徴とする。
Invention of Claim 2 is a manufacturing method of the terminal crimping electric wire of Claim 1, Comprising: The said core wire part is a state before crimping to the crimping part of the said terminal, and an outer periphery diameter is the said crimping part. It is set to be larger than the inner peripheral diameter in the state where the staking is crimped.

この端子圧着電線では、端子の加締め部に加締められる前の状態で、芯線部の外周径が加締め部を加締めた状態の内周径より大きく設定されているので、芯線部と加締め部との接触を加締め部の全域で確実に行うことができ、芯線部におけるクリープの発生を抑制して加締め部における接触抵抗の増加を抑制することができる。   In this terminal crimped electric wire, the outer peripheral diameter of the core wire portion is set larger than the inner peripheral diameter of the crimped portion in a state before being crimped to the crimped portion of the terminal. The contact with the tightening portion can be reliably performed in the entire area of the crimping portion, and the occurrence of creep in the core wire portion can be suppressed to prevent an increase in contact resistance at the crimping portion.

本発明によれば、１本の導体からなる芯線部におけるクリープの発生を抑制することができる端子圧着電線を提供することができるという効果を奏する。   According to the present invention, there is an effect that it is possible to provide a terminal crimped electric wire that can suppress the occurrence of creep in the core portion made of one conductor.

本発明の実施の形態に係る端子圧着電線の端子を加締める前の断面図である。It is sectional drawing before crimping the terminal of the terminal crimping electric wire which concerns on embodiment of this invention. 本発明の実施の形態に係る端子圧着電線の端子を加締めたときの断面図である。It is sectional drawing when the terminal of the terminal crimping electric wire which concerns on embodiment of this invention is crimped. （ａ）は本発明の実施の形態に係る端子圧着電線の端子を加締める前の斜視図である。（ｂ）は本発明の実施の形態に係る端子圧着電線の端子を加締めたときの斜視図である(A) is a perspective view before crimping the terminal of the terminal crimping electric wire which concerns on embodiment of this invention. (B) is a perspective view when crimping the terminal of the terminal crimping electric wire which concerns on embodiment of this invention. 本発明の実施の形態に係る端子圧着電線の加工前の斜視図である。It is a perspective view before the process of the terminal crimping electric wire which concerns on embodiment of this invention. 本発明の実施の形態に係る端子圧着電線の加工時の斜視図である。It is a perspective view at the time of the process of the terminal crimping electric wire which concerns on embodiment of this invention. （ａ），（ｂ）は本発明の実施の形態に係る端子圧着電線の凹部の他例を示す側面図である。(A), (b) is a side view which shows the other example of the recessed part of the terminal crimping electric wire which concerns on embodiment of this invention.

図１〜図６を用いて本発明の実施の形態に係る端子圧着電線について説明する。   A terminal crimped electric wire according to an embodiment of the present invention will be described with reference to FIGS.

本実施の形態に係る端子圧着電線１は、１本の導体からなる芯線部３と、この芯線部３の外周を覆う被覆部５とを備え、被覆部５から露出する芯線部３に端子７の加締め部９が加締められて導通される。   The terminal crimped electric wire 1 according to the present embodiment includes a core wire portion 3 made of one conductor and a covering portion 5 that covers the outer periphery of the core wire portion 3, and the terminal 7 is connected to the core wire portion 3 exposed from the covering portion 5. The caulking portion 9 is caulked and conducted.

そして、芯線部３は、端子７の加締め部９に加締められる前の状態で、外周形状が加締め部９を加締めた状態の内周形状と略同一形状に形成されている。   The core wire portion 3 is formed in substantially the same shape as the inner peripheral shape in a state in which the caulking portion 9 is caulked before the caulking portion 9 of the terminal 7 is caulked.

また、芯線部３は、端子７の加締め部９に加締められる前の状態で、外周径が加締め部９を加締めた状態の内周径より大きく設定されている。   Further, the core wire portion 3 is set to have an outer peripheral diameter larger than an inner peripheral diameter of the crimped portion 9 in a state before being crimped to the crimped portion 9 of the terminal 7.

さらに、加締め部９は、互いの端部を当接して芯線部３を挟み込む一対の狭持部１１，１３を有し、芯線部３には、一対の狭持部１１，１３の端部を配置させる凹部１５が設けられている。   Furthermore, the crimping portion 9 has a pair of holding portions 11 and 13 that abut each other's ends and sandwich the core wire portion 3, and the core wire portion 3 includes the end portions of the pair of holding portions 11 and 13. A recess 15 is provided for disposing the.

図３に示すように、端子圧着電線１に導通される端子７は、接触部１７と加締め部９とを備えている。接触部１７は、筒状に形成された雌型からなり、相手端子である雄型端子（不図示）のタブが挿入されて相手端子と端子７とが電気的に接続される。この接触部１７には、加締め部９が一体に設けられている。   As shown in FIG. 3, the terminal 7 that is conducted to the terminal crimping electric wire 1 includes a contact portion 17 and a caulking portion 9. The contact portion 17 is formed of a female shape formed in a cylindrical shape, and a tab of a male terminal (not shown) which is a mating terminal is inserted to electrically connect the mating terminal and the terminal 7. The contact portion 17 is integrally provided with a caulking portion 9.

加締め部９は、底壁１９と一対の狭持部１１，１３とからなる。底壁１９は、接触部１７と連続する一部材で形成され、端子７の長手方向に延設されている。この底壁１９は、端子圧着電線１の芯線部３の下面側に配置され、幅方向の両側には一対の狭持部１１，１３が設けられている。   The caulking portion 9 includes a bottom wall 19 and a pair of holding portions 11 and 13. The bottom wall 19 is formed as one member continuous with the contact portion 17 and extends in the longitudinal direction of the terminal 7. The bottom wall 19 is disposed on the lower surface side of the core wire portion 3 of the terminal crimping electric wire 1, and a pair of sandwiching portions 11 and 13 are provided on both sides in the width direction.

一対の狭持部１１，１３は、それぞれ底壁１９の幅方向の両側に底壁１９及び接触部１７と連続する一部材で形成されている。この一対の狭持部１１，１３は、上型と下型とからなる治具（不図示）などによって被覆部５が剥ぎ取られて芯線部３が露出した端子圧着電線１の端末に加締められ、端子７と端子圧着電線１とが電気的に接続される。   The pair of sandwiching portions 11 and 13 are formed of one member that is continuous with the bottom wall 19 and the contact portion 17 on both sides of the bottom wall 19 in the width direction. The pair of holding portions 11 and 13 are crimped to the terminal of the terminal crimping electric wire 1 where the covering portion 5 is peeled off by a jig (not shown) composed of an upper die and a lower die and the core wire portion 3 is exposed. The terminal 7 and the terminal crimping electric wire 1 are electrically connected.

図１〜図６に示すように、端子圧着電線１は、芯線部３と被覆部５とを備えている。芯線部３は、アルミニウムやアルミニウム合金などの導電性材料の１本の導体からなる。この芯線部３の外周には、被覆部５が一体に設けられている。   As shown in FIGS. 1 to 6, the terminal crimped electric wire 1 includes a core wire portion 3 and a covering portion 5. The core wire part 3 consists of one conductor of conductive materials, such as aluminum and aluminum alloy. A covering portion 5 is integrally provided on the outer periphery of the core wire portion 3.

被覆部５は、合成樹脂などの絶縁材料からなり、芯線部３の外周を覆うように芯線部３と一体に設けられている。この被覆部５を剥がすことにより、芯線部３が露出し、この露出した芯線部３に端子７の加締め部９が加締められる。   The covering portion 5 is made of an insulating material such as synthetic resin, and is provided integrally with the core wire portion 3 so as to cover the outer periphery of the core wire portion 3. By peeling off the covering portion 5, the core wire portion 3 is exposed, and the crimped portion 9 of the terminal 7 is crimped to the exposed core wire portion 3.

このような加締め部９に加締められる芯線部３は、加締め部９に加締められる前の状態で、図５に示すように、一対のフォーミング用金型２１，２３によって挟み込まれて外周形状が形成される。   As shown in FIG. 5, the core wire portion 3 to be crimped to the crimping portion 9 is sandwiched between a pair of forming dies 21 and 23 before being crimped to the crimping portion 9. A shape is formed.

このように形成された図１に示す芯線部３の外周形状は、図２に示すように、芯線部３に加締め部９を加締めたときの加締め部９の内周形状と略同一形状となっている。また、図１の芯線部３の点線は、芯線部３に加締め部９を加締めたときの加締め部９の内周径となっており、芯線部３の外周径は、加締め部９の内周径より大きく設定されている。この大きく設定された芯線部３の外周径は、加締め部９を加締めたときの加工代となっている。さらに、芯線部３の加締め部９を加締めたときの一対の狭持部１１，１３の端部が位置する部分は、凹部１５となっている。   The outer peripheral shape of the core wire portion 3 shown in FIG. 1 formed in this way is substantially the same as the inner peripheral shape of the crimped portion 9 when the crimped portion 9 is crimped to the core wire portion 3 as shown in FIG. It has a shape. Moreover, the dotted line of the core wire part 3 of FIG. 1 becomes the inner peripheral diameter of the crimping part 9 when the crimping part 9 is crimped to the core wire part 3, and the outer peripheral diameter of the core wire part 3 is the crimped part. 9 is set larger than the inner peripheral diameter. The outer peripheral diameter of the core wire portion 3 set to be large is a machining allowance when the caulking portion 9 is caulked. Furthermore, the part where the edge part of a pair of clamping parts 11 and 13 when the crimping part 9 of the core wire part 3 is crimped is the recessed part 15. FIG.

ここで、通常の何も加工が施されていない芯線部３に加締め部９を加締める際には、図２に示すように、一対の狭持部１１，１３の端部が当接する部分Ａ、底壁１９の部分Ａと対向する部分Ｂ、一対の狭持部１１，１３のそれぞれの側部である部分Ｃの順で接触圧力が低くなる。このような接触圧力の差により、芯線部３を加締める加締め部９にクリープが起こると、特に接触圧力の高い部分Ａや部分Ｂで接触圧力が低下し、加締め部９で十分な接触圧力を確保することができず、端子７と端子圧着電線１の接触抵抗が増加していた。   Here, when the caulking portion 9 is caulked to the core wire portion 3 that is not subjected to any normal processing, as shown in FIG. 2, the end portions of the pair of holding portions 11 and 13 are in contact with each other. The contact pressure decreases in the order of A, part B of the bottom wall 19 facing the part A, and part C which is the side of each of the pair of sandwiching parts 11 and 13. When creep occurs in the caulking portion 9 that caulks the core wire portion 3 due to such a difference in contact pressure, the contact pressure decreases particularly in the portion A and the portion B where the contact pressure is high, and the caulking portion 9 is sufficient in contact. The pressure could not be secured, and the contact resistance between the terminal 7 and the terminal crimping electric wire 1 was increased.

そこで、芯線部３の外周形状を加締め部９を加締めたときの加締め部９の内周形状と略同一形状とすることにより、芯線部３に加締め部９を加締める際の荷重が芯線部３の中心に掛かるようになって、加締め部９における接触圧力が均等化される。また、芯線部３に凹部１５を設けることにより、接触圧力が最も高くなる部分Ａの接触圧力の上昇を緩和することができる。従って、加締め部９における接触圧力が均等化されるので、芯線部３を加締める加締め部９におけるクリープの発生を抑制して接触圧力が低下する部分が減少され、接触抵抗の増加を抑制することができる。   Therefore, the load when the caulking portion 9 is caulked to the core wire portion 3 by making the outer peripheral shape of the core wire portion 3 substantially the same as the inner circumferential shape of the caulking portion 9 when the caulking portion 9 is caulked. Is applied to the center of the core part 3, and the contact pressure in the caulking part 9 is equalized. Moreover, by providing the recessed part 15 in the core part 3, the raise of the contact pressure of the part A where contact pressure becomes the highest can be relieved. Accordingly, since the contact pressure in the crimping portion 9 is equalized, the occurrence of creep in the crimping portion 9 that crimps the core wire portion 3 is suppressed, the portion where the contact pressure is reduced is reduced, and the increase in contact resistance is suppressed. can do.

なお、凹部１５の形状は、図１などに示す形状に限らず、例えば、図６に示すような凹部１５ａや凹部１５ｂなどの形状であってもよく、一対の狭持部１１，１３の端部を配置させ、接触圧力の上昇を緩和できる形状であればどのような形状であってもよい。   The shape of the recess 15 is not limited to the shape shown in FIG. 1 or the like, and may be, for example, the shape of the recess 15a or the recess 15b as shown in FIG. Any shape may be used as long as the portion can be arranged and the increase in contact pressure can be mitigated.

このように構成された端子圧着電線１は、まず、所定位置の被覆部５を剥がして芯線部３を露出させる。次に、露出させた芯線部３に対して、一対のフォーミング用金型２１，２３で挟んで、芯線部３の外周形状を加締め部９で加締めたときの外周形状と略同一形状に形成すると共に、芯線部３の外周径を加締め部９で加締めたときの外周径より大きく形成させる。そして、この加工された芯線部３に対して、治具などによって芯線部３を外周側から中心側に向けて圧縮するように一対の狭持部１１，１３を加締め、端子７と端子圧着電線１とを導通させる。   The terminal crimped electric wire 1 configured as described above first peels off the covering portion 5 at a predetermined position to expose the core wire portion 3. Next, the exposed core wire part 3 is sandwiched between a pair of forming dies 21 and 23 so that the outer peripheral shape of the core wire part 3 is substantially the same as the outer peripheral shape when the crimped part 9 is crimped. While forming, the outer periphery diameter of the core part 3 is made larger than the outer periphery diameter when crimped by the crimping part 9. Then, the pair of holding portions 11 and 13 are crimped to the processed core wire portion 3 so as to compress the core wire portion 3 from the outer peripheral side toward the center side with a jig or the like, and the terminal 7 and the terminal crimping are performed. Conduction with the electric wire 1 is conducted.

このような端子圧着電線１では、端子７の加締め部９に加締められる前の状態で、芯線部３の外周形状が加締め部９を加締めた状態の内周形状と略同一形状に形成されているので、加締め部９を芯線部３に加締めるときに加締め部９における接触圧力が均等化され、芯線部３におけるクリープの発生を抑制して接触圧力が低下する部分を減少させることができる。   In such a terminal crimped electric wire 1, the outer peripheral shape of the core wire portion 3 is substantially the same as the inner peripheral shape of the crimped portion 9 before being crimped to the crimped portion 9 of the terminal 7. Since it is formed, when the caulking part 9 is caulked to the core wire part 3, the contact pressure in the caulking part 9 is equalized, and the occurrence of creep in the core wire part 3 is suppressed and the portion where the contact pressure is reduced is reduced. Can be made.

従って、このような端子圧着電線１では、１本の導体からなる芯線部３におけるクリープの発生を抑制することができ、接触抵抗の増加を抑制することができる。   Therefore, in such a terminal crimped electric wire 1, the occurrence of creep in the core wire portion 3 made of one conductor can be suppressed, and an increase in contact resistance can be suppressed.

また、芯線部３の外周径は、端子７の加締め部９に加締められる前の状態で、加締め部９を加締めた状態の内周径より大きく設定されているので、芯線部３と加締め部９との接触を加締め部９の全域で確実に行うことができ、芯線部３におけるクリープの発生を抑制して加締め部９における接触抵抗の増加を抑制することができる。   Further, the outer peripheral diameter of the core wire portion 3 is set larger than the inner peripheral diameter of the crimped portion 9 in a state before being crimped to the crimped portion 9 of the terminal 7. It is possible to reliably make contact with the crimping portion 9 over the entire area of the crimping portion 9, suppress the occurrence of creep in the core wire portion 3, and suppress an increase in contact resistance in the crimping portion 9.

さらに、芯線部３には、一対の狭持部１１，１３の端部を配置させる凹部１５が設けられているので、加締め部９において一番接触圧力が高くなる一対の狭持部１１，１３の端部が位置する部分の接触圧力の上昇を緩和することができ、加締め部９における接触圧力をより均等化することができる。   Furthermore, since the core wire part 3 is provided with the recessed part 15 which arrange | positions the edge part of a pair of clamping parts 11 and 13, a pair of clamping parts 11 and the highest contact pressure in the crimping part 9 are provided. The increase in contact pressure at the portion where the end portion of 13 is located can be mitigated, and the contact pressure at the caulking portion 9 can be more equalized.

なお、本発明の実施の形態に係る端子圧着電線では、圧着される端子が、接触部が筒状に形成された雌型端子となっているが、接触部をタブなどに形成した雄型端子であってもよい。   In the terminal crimped electric wire according to the embodiment of the present invention, the terminal to be crimped is a female terminal in which the contact portion is formed in a cylindrical shape, but the male terminal in which the contact portion is formed in a tab or the like. It may be.

また、端子には、芯線部に加締められる加締め部のみが設けられているが、これに限らず、加締め部に加えて、被覆部を加締めて端子と端子圧着電線との固定を安定化させる被覆加締め部を設けてもよい。   In addition, the terminal is provided with only a crimping portion that is crimped to the core wire portion. However, the present invention is not limited to this, and in addition to the crimping portion, the covering portion is crimped to fix the terminal and the terminal crimping electric wire. You may provide the covering crimp part to stabilize.

１…端子圧着電線
３…芯線部
５…被覆部
７…端子
９…加締め部
１１，１３…一対の狭持部
１５，１５ａ，１５ｂ…凹部 DESCRIPTION OF SYMBOLS 1 ... Terminal crimping electric wire 3 ... Core wire part 5 ... Covering part 7 ... Terminal 9 ... Clamping part 11, 13 ... A pair of clamping part 15, 15a, 15b ... Recessed part

Claims (2)

１本の導体からなる芯線部と、この芯線部の外周を覆う被覆部とを備え、前記被覆部から露出する前記芯線部に端子の加締め部が加締められて導通される端子圧着電線の製造方法であって、
前記芯線部は、前記端子の加締め部に加締められる前の状態で、外周形状が前記加締め部を加締めた状態の内周形状と略同一形状に形成され、
前記加締め部は、互いの端部を当接して前記芯線部を挟み込む一対の狭持部を有し、前記芯線部には、前記一対の狭持部の端部を配置させる凹部が設けられることを特徴とする端子圧着電線の製造方法。 A terminal crimped electric wire comprising: a core wire portion made of a single conductor; and a covering portion covering an outer periphery of the core wire portion, wherein a crimping portion of a terminal is crimped to the core wire portion exposed from the covering portion to be conducted . A manufacturing method comprising :
The core wire portion is formed in substantially the same shape as the inner peripheral shape of the state in which the outer peripheral shape is crimped to the crimped portion in a state before being crimped to the crimped portion of the terminal,
The caulking portion has a pair of holding portions that abut each other's ends and sandwich the core wire portion, and the core wire portion is provided with a recess for arranging the end portions of the pair of holding portions. A method for producing a terminal crimped electric wire, characterized in that : 請求項１記載の端子圧着電線の製造方法であって、
前記芯線部は、前記端子の加締め部に加締められる前の状態で、外周径が前記加締め部を加締めた状態の内周径より大きく設定されることを特徴とする端子圧着電線の製造方法。 It is a manufacturing method of the terminal crimping electric wire according to claim 1,
The core wire portion, in a state before being crimped crimping portion of the terminal, the terminal crimping electric wires, characterized in that the outside diameter is set larger than the inner circumference of the state where the swaged said crimp portion Manufacturing method .
JP2011173014A 2011-08-08 2011-08-08 Manufacturing method of terminal crimped wire Active JP5902414B2 (en)

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