JP5684425B1 - Wire harness, connection method of terminal and coated conductor, wire harness structure - Google Patents

Wire harness, connection method of terminal and coated conductor, wire harness structure Download PDF

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JP5684425B1
JP5684425B1 JP2014193852A JP2014193852A JP5684425B1 JP 5684425 B1 JP5684425 B1 JP 5684425B1 JP 2014193852 A JP2014193852 A JP 2014193852A JP 2014193852 A JP2014193852 A JP 2014193852A JP 5684425 B1 JP5684425 B1 JP 5684425B1
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crimping
coated
terminal
longitudinal
covering
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JP2015100258A (en
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博 折戸
博 折戸
泰 木原
泰 木原
幸大 川村
幸大 川村
翔 外池
翔 外池
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古河電気工業株式会社
古河As株式会社
古河As株式会社
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-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
    • H01R4/10Electrically-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
    • H01R4/18Electrically-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
    • H01R4/20Electrically-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 using a crimping sleeve
    • H01R4/203Electrically-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 using a crimping sleeve having an uneven wire-receiving surface to improve the contact
    • H01R4/206Electrically-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 using a crimping sleeve having an uneven wire-receiving surface to improve the contact with transversal grooves or threads
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/2806Protection against damage caused by corrosion
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048Crimping apparatus or processes
    • H01R43/0488Crimping apparatus or processes with crimp height adjusting means
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02Contact members
    • H01R13/10Sockets for co-operation with pins or blades
    • H01R13/11Resilient sockets
    • H01R13/113Resilient sockets co-operating with pins or blades having a rectangular transverse section
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-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
    • H01R4/58Electrically-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
    • H01R4/62Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/005Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/14Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

Abstract

【課題】 樹脂材を用いずに電線との接触部分への水分の付着を予防可能であり、かつ、製造工程の簡略化を図ることが可能なワイヤハーネス等を提供する【解決手段】 ワイヤハーネス1は、電線10と圧着端子20とを含む。電線10は、導線が絶縁体で被覆された絶縁被覆部12と、絶縁被覆部12の先端から導線の一部が露出した導線露出部11を有する。圧着端子20は、前端部20Aに位置するボックス部21と、後端部20Bに位置するとともに電線10を挿入可能な圧着部22とを有する。圧着部22は、後端部20Bに開口し、絶縁被覆部12に圧着される被覆圧着部24と、導線露出部11に圧着される導線圧着部23とを含む。被覆圧着部24には、径方向内側に突出する凸条部25が設けられる。【選択図】図3PROBLEM TO BE SOLVED: To provide a wire harness capable of preventing moisture from adhering to a contact portion with an electric wire without using a resin material and capable of simplifying a manufacturing process. 1 includes an electric wire 10 and a crimp terminal 20. The electric wire 10 includes an insulating covering portion 12 in which a conducting wire is covered with an insulator, and a conducting wire exposed portion 11 in which a part of the conducting wire is exposed from the tip of the insulating covering portion 12. The crimp terminal 20 includes a box portion 21 located at the front end portion 20A and a crimp portion 22 located at the rear end portion 20B and into which the electric wire 10 can be inserted. The crimping portion 22 includes a cover crimping portion 24 that opens to the rear end portion 20 </ b> B and is crimped to the insulating coating portion 12, and a conductor crimping portion 23 that is crimped to the conductor exposed portion 11. The covering crimping portion 24 is provided with a protruding strip portion 25 that protrudes radially inward. [Selection] Figure 3

Description

本発明は自動車等に用いられるワイヤハーネス等に関するものである。   The present invention relates to a wire harness or the like used for an automobile or the like.
従来、自動車用ワイヤ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合が一般的である。しかし、このようなワイヤハーネスでは、電線と端子の接続部分に水分等が付着してしまうと、電線に用いられる金属表面の酸化が進み、接合部における抵抗が増加してしまう。また電線と端子に用いられる金属が異なる場合、異種金属間腐食が進んでしまう。当該接続部分における金属材料の腐食の進行は、接続部分の割れや接触不良の原因となり、製品寿命への影響を免れない。特に近年では、電線をアルミニウム合金とし、端子を銅合金とするワイヤハーネスが実用化されつつあり、接合部の腐食の課題が顕著になってきている。   Conventionally, the connection between an electric wire and a terminal in an automotive wire harness is generally a crimp bonding in which the electric wire is crimped by a terminal called an open barrel type. However, in such a wire harness, when moisture or the like adheres to the connection portion between the electric wire and the terminal, the oxidation of the metal surface used for the electric wire proceeds, and the resistance at the joint increases. Moreover, when the metal used for an electric wire and a terminal differs, the corrosion between different metals will advance. The progress of the corrosion of the metal material in the connection portion causes cracks in the connection portion and contact failure, and thus cannot be affected by the product life. Particularly in recent years, wire harnesses in which the electric wires are made of an aluminum alloy and the terminals are made of a copper alloy are being put into practical use, and the problem of corrosion at the joints has become prominent.
ここで、例えばアルミニウムと銅のような異種金属の接触部分に水分が付着すると、腐食電位の違いから、いわゆる電食が発生する恐れがある。特に、アルミニウムと銅との電位差は大きいから、電気的に卑であるアルミニウム側の腐食が進行する。このため、導線と圧着端子との接続状態が不安定となり、接触抵抗の増加や線径の減少による電気抵抗の増大、さらには断線が生じて電装部品の誤動作、機能停止に至る恐れがある。   Here, if moisture adheres to a contact portion of different metals such as aluminum and copper, so-called galvanic corrosion may occur due to a difference in corrosion potential. In particular, since the potential difference between aluminum and copper is large, corrosion on the aluminum side, which is electrically base, proceeds. For this reason, the connection state between the conducting wire and the crimp terminal becomes unstable, and there is a possibility that the electrical resistance increases due to an increase in contact resistance or a decrease in the wire diameter, and further, disconnection occurs, leading to malfunction of the electrical component or a malfunction.
このような異種金属が接触するワイヤハーネスにおいて、電線と圧着端子との接続部を覆うように樹脂材を充填したものがある(特許文献1)。樹脂材を充填することによって、電線と圧着端子との接触部分に水分が付着するのを防止する。   Among such wire harnesses in contact with different types of metals, there is one in which a resin material is filled so as to cover a connection portion between an electric wire and a crimp terminal (Patent Document 1). By filling the resin material, moisture is prevented from adhering to the contact portion between the electric wire and the crimp terminal.
特開2004−111058号公報JP 2004-111058 A
しかし、特許文献1の方法では、樹脂材を別途充填しなければならないので、製造工程が複雑になり、その分、製造工程における管理も複雑化するという問題が生じる。また、工程が複雑になった分、ワイヤハーネス全体のコストも上がってしまう。従って、樹脂材を用いない止水方法が望まれている。   However, in the method of Patent Document 1, since the resin material must be separately filled, the manufacturing process becomes complicated, and accordingly, the management in the manufacturing process becomes complicated. In addition, the cost of the entire wire harness increases due to the complexity of the process. Therefore, a water stop method that does not use a resin material is desired.
本発明は、このような問題に鑑みてなされたもので、樹脂材を用いずに電線との接触部分への水分の付着を予防可能であり、かつ、製造工程の簡略化を図ることが可能なワイヤハーネス等を提供することを目的とする。   The present invention has been made in view of such a problem, and can prevent moisture from adhering to a contact portion with an electric wire without using a resin material, and can simplify the manufacturing process. An object is to provide a wire harness and the like.
前述した目的を達するために第1の発明は、被覆導線と端子とが接続されるワイヤハーネスであって、前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、前記被覆圧着部の長手方向の長さは、2mm以上であり、前記被覆圧着部の内面に突出する周方向に環状の凸条部が形成され、前記凸条部は、高さが前記端子の板厚以下であり、前記被覆圧着部の長手方向に離間して複数個設けられ、隣接する前記凸条部間の離間距離の少なくとも一つが前記被覆部の厚さの5倍以下であり、前記凸条部における前記被覆圧着部の圧縮率が45%〜90%であり、前記凸条部に対応する前記被覆圧着部の外面の凹部の深さは、圧着前の前記被覆導線の絶縁体の厚みに対し、少なくとも一部が14%〜75%であり、前記凸条部に対応する前記被覆圧着部の外面の凹部の長手方向の長さは、0.20mm〜0.90mmであることを特徴とするワイヤハーネスである。
In order to achieve the above-described object, the first invention is a wire harness in which a coated conductor and a terminal are connected, and the terminal includes a crimping portion to which the coated conductor is crimped, and a terminal body, The crimping part has a coated crimping part that crimps the covering part and a conductive wire crimping part that crimps the conductive wire exposed from the covering part, and other parts are sealed except the part where the coated conductive wire is inserted. is is, the longitudinal length of said insulation crimp portion is, it is 2mm or more, the convex portion of the annular circumferential direction to protrude to the inner surface of the insulation crimp portion is formed, the convex portion has a height Is equal to or less than the plate thickness of the terminal, and a plurality of gaps are provided apart from each other in the longitudinal direction of the covering crimping portion, and at least one of the separation distances between the adjacent ridges is not more than five times the thickness of the covering portion. And the compression ratio of the coated crimping portion in the ridge portion is 45% to 90%. And the depth of the concave portion on the outer surface of the coated crimping portion corresponding to the convex strip portion is at least partly 14% to 75% with respect to the thickness of the insulator of the coated conducting wire before crimping, and the convexity longitudinal length of the recess in the outer surface of the insulation crimp portion corresponding to the ridges are wire harness, wherein 0.20mm~0.90mm der Rukoto.
前記凸条部に対応する前記被覆圧着部の外面の凹部の後端から前記被覆圧着部の端部までの直線部の距離が0.5mm以上であることが望ましい。   It is desirable that the distance of the straight line portion from the rear end of the concave portion on the outer surface of the coated crimping portion corresponding to the convex strip portion to the end of the coated crimped portion is 0.5 mm or more.
前記被覆圧着部の内面には、圧着時における金型の合わせ部に窪みが形成され、前記凸条部の径方向の寸法は、前記窪みの寸法以上であってもよい。   On the inner surface of the coated crimping portion, a recess is formed in the mating portion of the mold at the time of crimping, and the radial dimension of the ridge may be greater than or equal to the dimension of the recess.
複数の前記凸条部の長手方向のピッチは、前記端子の板厚の1.5倍以上であることが望ましい。複数の前記凸条部の長手方向のピッチは、0.5mm〜2.0mmであることが望ましい。前記凸条部に対応する前記被覆圧着部の外面の凹部の長手方向の長さ×前記凸条部の個数が、前記被覆圧着部の長手方向の長さの1/2以下であることが望ましい。   The pitch in the longitudinal direction of the plurality of ridges is preferably 1.5 times or more the plate thickness of the terminals. The pitch in the longitudinal direction of the plurality of ridges is preferably 0.5 mm to 2.0 mm. Desirably, the length in the longitudinal direction of the concave portion on the outer surface of the coated crimping portion corresponding to the convex strip portion × the number of the convex strip portions is ½ or less of the length in the longitudinal direction of the coated crimped portion. .
前記導線はアルミニウム系材料で構成され、前記導線圧着部が銅系材料で構成されてもよい。   The conducting wire may be made of an aluminum-based material, and the conducting wire crimping portion may be made of a copper-based material.
第1の発明によれば、圧着端子の導線圧着部が電線の導線露出部に圧着され、被覆圧着部が絶縁被覆部に圧着され、さらに、被覆圧着部に凸条部を設けるから、樹脂材を用いずに、水分の侵入を防止することができ、電線と圧着端子との接触部分に水分が付着するのを予防することができる。また、その分製造工程の簡略化を図ることができ、さらにその分のコスト上昇を抑えられる。   According to the first invention, the lead wire crimping portion of the crimp terminal is crimped to the conductor exposed portion of the electric wire, the coated crimp portion is crimped to the insulating coating portion, and the protruding crimp portion is further provided on the coated crimp portion. Intrusion of moisture can be prevented without using and moisture can be prevented from adhering to the contact portion between the electric wire and the crimp terminal. Further, the manufacturing process can be simplified correspondingly, and the cost increase correspondingly can be suppressed.
また、凸条部は、絶縁被覆部の周方向に環状に設けられるので、その周方向全域において、水密に維持することができる。   Moreover, since the protruding portion is provided in a ring shape in the circumferential direction of the insulating coating portion, it can be kept watertight in the entire circumferential direction.
また、凸条部における被覆圧着部の圧縮率を45%〜90%とすることで、確実に止水性を確保することができる。   Moreover, a water stoppage can be ensured reliably by making the compression rate of the coating | compression-bonding crimping part in a protruding item | line part into 45 to 90%.
また、凸条部の高さが端子の板厚以下とすることで、凸条部において被覆圧着部が薄肉化することを抑制することができる。また、凸条部に対応する被覆圧着部の外面の凹部の深さは、圧着前の被覆導線の非圧着部の絶縁体の厚みに対して、75%以下とすることで、凸条部の効果を確実に得るとともに、絶縁体の破れを抑制することができる。   Moreover, it can suppress that a coating crimping | compression-bonding part thins in a protruding item | line part because the height of a protruding item | line part shall be below the board thickness of a terminal. In addition, the depth of the concave portion on the outer surface of the coated crimping portion corresponding to the convex strip portion is 75% or less with respect to the thickness of the insulator of the non-crimped portion of the coated conductor before crimping, While obtaining an effect reliably, the tearing of an insulator can be suppressed.
また、凸条部に対応する被覆圧着部の外面の凹部の長手方向の長さを0.20mm〜0.90mmとすることで、金型の破損を防ぐとともに、端子が必要以上に長くなることを抑制することができる。   In addition, by making the length in the longitudinal direction of the concave portion of the outer surface of the coated crimping portion corresponding to the ridge portion from 0.20 mm to 0.90 mm, damage to the mold is prevented and the terminal becomes longer than necessary. Can be suppressed.
また、被覆圧着部の長手方向の長さを2mm以上とすることで、確実に被覆部を保持することができる。なお、被覆圧着部の長手方向の長さを3mm以下とすれば、端子が必要以上に長くなることを抑制することができる。   Moreover, a coating | coated part can be reliably hold | maintained because the length of the longitudinal direction of a coating | coated crimping | compression-bonding part shall be 2 mm or more. In addition, if the length in the longitudinal direction of the coated crimping portion is 3 mm or less, it is possible to prevent the terminals from becoming longer than necessary.
また、凸条部に対応する被覆圧着部の外面の凹部の後端から被覆圧着部の端部までの直線部の距離を0.5mm以上とすることで、被覆圧着部の端部をラッパ状にした際に端子の溶接部の割れを防止することができる。すなわち止水性を確保することができる。   In addition, by setting the distance of the straight portion from the rear end of the concave portion on the outer surface of the coated crimping portion corresponding to the ridge to the end of the coated crimped portion is 0.5 mm or more, the end of the coated crimped portion is a trumpet shape. It is possible to prevent the welded portion of the terminal from being cracked. That is, it is possible to ensure water stopping.
また、凸条部の径方向の寸法(高さ)は、絶縁被覆部の内面に形成された窪みの寸法以上であるので、圧着時に窪みが形成された場合であっても、窪み形成による圧着力の低下を予防することができる。   Further, since the radial dimension (height) of the ridge portion is equal to or greater than the size of the recess formed on the inner surface of the insulating coating portion, even when the recess is formed during crimping, the crimping by the recess formation is performed. It is possible to prevent a decrease in power.
また、凸条部は、長手方向に複数設けることとしたので、より一層水密性を確保することができる。   In addition, since a plurality of ridges are provided in the longitudinal direction, water tightness can be further ensured.
また、複数の凸条部の長手方向のピッチを0.5mm〜2.0mmとすることで、凸条部同士がつながらずに確実に凸条部を複数個形成することができるとともに、端子が必要以上に長くなることを抑制することができる。   In addition, by setting the pitch in the longitudinal direction of the plurality of ridges to be 0.5 mm to 2.0 mm, it is possible to reliably form a plurality of ridges without connecting the ridges, and the terminals are It can suppress becoming longer than necessary.
また、第2の発明は、端子と被覆導線との接続する方法であって、前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、前記被覆圧着部の長手方向の長さは、2mm以上であり、前記圧着部に前記被覆導線を挿入し、金型で前記圧着部を圧着する際に前記被覆圧着部の内面に突出するように、高さが前記端子の板厚以下であり、周方向に環状の凸条部を、前記被覆圧着部の長手方向に離間して複数個形成し、隣接する前記凸条部間の離間距離の少なくとも一つを前記被覆部の厚さの5倍以下とし、前記凸条部に対応する前記被覆圧着部の外面の凹部の深さは、圧着前の前記被覆導線の絶縁体の厚みに対し、少なくとも一部を14%〜75%とし、前記凸条部に対応する前記被覆圧着部の外面の凹部の長手方向の長さを、0.20mm〜0.90mmとし、前記凸条部における前記被覆圧着部の圧縮率が45%〜90%となるように、前記被覆圧着部で前記被覆導線を圧着することを特徴とする端子と被覆導線の接続方法である。
The second invention is a method of connecting a terminal and a coated conductor, wherein the terminal has a crimping part to which the coated conductor is crimped, and a terminal body, and the crimping part is a covering part. and insulation crimp portion for crimping, and a wire crimping portion for crimping the conductor exposed from the covering section, except for the portion where the coated conductive wire is inserted, the other parts have been sealed, the insulation crimp The length in the longitudinal direction of the part is 2 mm or more, and the height is such that when the coated conductor is inserted into the crimping part and the crimping part is crimped with a mold, it protrudes to the inner surface of the coated crimping part. Is not more than the plate thickness of the terminal, and a plurality of annular ridges in the circumferential direction are formed apart from each other in the longitudinal direction of the coated crimping portion, and at least one of the separation distances between the adjacent ridges Is not more than 5 times the thickness of the covering portion, and the outer surface of the covering crimping portion corresponding to the ridge portion is The depth of the portion is at least a portion of 14% to 75% with respect to the thickness of the insulator of the coated conductor before crimping, and is in the longitudinal direction of the concave portion on the outer surface of the coated crimped portion corresponding to the protruding strip portion. The length is 0.20 mm to 0.90 mm, and the coated conductor is crimped by the coated crimped portion so that the compression rate of the coated crimped portion in the convex strip is 45% to 90%. It is a connection method of a terminal and a covered lead.
第2の発明によれば、被覆導線の圧着時に被覆圧着部に凸条部が形成されるため、確実に被覆部を圧着して、内部への水の浸入を防ぐことができる。この際、凸条部の圧着率が、45%〜90%であるため、被覆部が破損することなく、確実に、被覆部を圧着することができる。   According to the second aspect of the invention, since the protruding strip portion is formed in the coated crimping portion when the coated conductor is crimped, the coated portion can be reliably crimped to prevent water from entering the inside. Under the present circumstances, since the crimping | compression-bonding rate of a protruding item | line part is 45%-90%, a coating | coated part can be crimped | bonded reliably, without a coating | covering part being damaged.
第3の発明は、複数本のワイヤハーネスが束ねられたワイヤハーネス構造体であって、前記ワイヤハーネスは、被覆導線と端子とが接続されており、前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、前記被覆圧着部の長手方向の長さは、2mm以上であり、前記被覆圧着部の内面に突出する周方向に環状の凸条部が形成され、前記凸条部は、高さが前記端子の板厚以下であり、前記被覆圧着部の長手方向に離間して複数個設けられ、隣接する前記凸条部間の離間距離の少なくとも一つが前記被覆部の厚さの5倍以下であり、前記凸条部における前記被覆圧着部の圧縮率が45%〜90%であり、前記凸条部に対応する前記被覆圧着部の外面の凹部の深さは、圧着前の前記被覆導線の絶縁体の厚みに対し、少なくとも一部が14%〜75%であり、前記凸条部に対応する前記被覆圧着部の外面の凹部の長手方向の長さは、0.20mm〜0.90mmであることを特徴とするワイヤハーネス構造体である。 A third invention is a wire harness structure in which a plurality of wire harnesses are bundled, wherein the wire harness is connected to a covered conductor and a terminal, and the terminal is crimped to the covered conductor. A crimping portion and a terminal body, and the crimping portion includes a covering crimping portion that crimps the covering portion and a conductor crimping portion that crimps a conductor exposed from the covering portion, and the covering conductor is inserted into the crimping portion. Other portions are sealed, the length in the longitudinal direction of the coated crimping portion is 2 mm or more, and an annular ridge is formed in the circumferential direction protruding on the inner surface of the coated crimping portion. The protrusions are formed, the height is equal to or less than the plate thickness of the terminal, and a plurality of protrusions are provided apart from each other in the longitudinal direction of the coated crimping part. At least one of the separation distances between the adjacent protrusions is provided. Is not more than 5 times the thickness of the covering portion, The compression ratio of the coated crimped portion is 45% to 90%, and the depth of the concave portion on the outer surface of the coated crimped portion corresponding to the protruding strip portion is relative to the thickness of the insulator of the coated conductor before crimping. , at least a portion of 14% to 75%, the longitudinal length of the recess in the outer surface of the insulation crimp portion corresponding to the convex portions, and wherein 0.20mm~0.90mm der Rukoto A wire harness structure.
本発明では、複数本のワイヤハーネスを束ねて用いることもできる。   In the present invention, a plurality of wire harnesses can be bundled and used.
本発明によれば、樹脂材を用いずに電線との接触部分への水分の付着を予防可能であり、かつ、製造工程の簡略化を図ることが可能なワイヤハーネス等を提供することができる。   According to the present invention, it is possible to provide a wire harness or the like that can prevent moisture from adhering to a contact portion with an electric wire without using a resin material and can simplify the manufacturing process. .
第1の実施形態のワイヤハーネスを示す分解斜視図。The disassembled perspective view which shows the wire harness of 1st Embodiment. 図1のII−II線断面図。II-II sectional view taken on the line of FIG. 圧着後のワイヤハーネスの斜視図。The perspective view of the wire harness after crimping | compression-bonding. 図3のIV−IV線断面図。IV-IV sectional view taken on the line of FIG. ワイヤハーネスの圧着方法の説明図。Explanatory drawing of the crimping method of a wire harness. 圧着刃型を大径部で切断したときの断面図。Sectional drawing when a crimping blade type | mold is cut | disconnected by the large diameter part. 図6のVIIで囲った部分の拡大図であって、ワイヤハーネスの圧着時を示す説明図。It is an enlarged view of the part enclosed with VII of FIG. 6, Comprising: Explanatory drawing which shows the time of crimping | bonding of a wire harness. ワイヤハーネスの部分拡大図であって、被覆圧着部で切断したときの断面図。It is the elements on larger scale of a wire harness, Comprising: Sectional drawing when it cut | disconnects by a covering crimping part. 図4の被覆圧着部近傍の部分拡大図であって、電線の絶縁体も切断したときの断面図。FIG. 5 is a partially enlarged view in the vicinity of the coated crimping portion in FIG. 4, and is a cross-sectional view when an electric wire insulator is also cut. 第2の実施形態のワイヤハーネスの斜視図。The perspective view of the wire harness of 2nd Embodiment. 図10のXI−XI線断面図。XI-XI sectional view taken on the line of FIG. 図11の被覆圧着部近傍の部分拡大図であって、電線の絶縁体も切断したときの断面図。FIG. 12 is a partially enlarged view of the vicinity of the cover crimping portion in FIG. 11, and is a cross-sectional view when the electric wire insulator is also cut. 圧着工具30aを用いて、端子と被覆導線とを接続する方法を示す断面図。Sectional drawing which shows the method of connecting a terminal and a covered conducting wire using the crimping tool 30a. 圧着工具30aを用いて、端子と被覆導線とを接続した状態を示す断面図。Sectional drawing which shows the state which connected the terminal and the covering conducting wire using the crimping tool 30a. (a)は、図13における被覆圧着部の断面図、(b)は、図14における被覆圧着部の断面図。(A) is sectional drawing of the covering crimping part in FIG. 13, (b) is sectional drawing of the covering crimping part in FIG. 被覆圧着部の部分断面拡大図であり、図14におけるA部拡大図。FIG. 15 is a partial cross-sectional enlarged view of a coated crimping portion, and is an enlarged view of a portion A in FIG. 実験方法の概要説明図。Outline explanatory drawing of an experimental method. 他の圧着端子の形態を示す斜視図。The perspective view which shows the form of another crimp terminal.
<第1の実施形態>
図1はワイヤハーネス1の分解斜視図であって、加締め前の状態を示し、図2は図1のII−II線断面図である。ワイヤハーネス1は、長手方向Xおよびこれに直交する幅方向Yを有し、電線10と圧着端子20とを含む。電線10(被覆導線)は、導電性を有する導線16が絶縁体15で被覆された絶縁被覆部12と、絶縁被覆部12の長手方向X先端から導線16の一部が露出した導線露出部11を有する。導線16は、アルミニウムやアルミニウム合金等のアルミニウム系材料で構成され、より詳細には、複数のアルミニウム合金線等を撚って形成する。
<First Embodiment>
1 is an exploded perspective view of the wire harness 1 and shows a state before caulking, and FIG. 2 is a cross-sectional view taken along line II-II in FIG. The wire harness 1 has a longitudinal direction X and a width direction Y orthogonal to the longitudinal direction X, and includes an electric wire 10 and a crimp terminal 20. The electric wire 10 (covered conductive wire) includes an insulating coating portion 12 in which a conductive wire 16 is covered with an insulator 15 and a conductive wire exposed portion 11 in which a part of the conductive wire 16 is exposed from the distal end in the longitudinal direction X of the insulating coating portion 12. Have The conducting wire 16 is made of an aluminum-based material such as aluminum or aluminum alloy, and more specifically, is formed by twisting a plurality of aluminum alloy wires or the like.
圧着端子20は、長手方向Xに延びるとともに、長手方向Xの前端部20Aに位置する図示しない雄型コネクタを挿入可能なボックス部21と、後端部20Bに位置する電線10を挿入可能な圧着部22とを有する。ボックス部21には、雄型コネクタの挿入タブに接触する弾性接触片21Aを備える。   The crimp terminal 20 extends in the longitudinal direction X, and is a crimp that allows insertion of a male connector (not shown) located at the front end 20A in the longitudinal direction X and a wire 10 located at the rear end 20B. Part 22. The box portion 21 includes an elastic contact piece 21A that comes into contact with the insertion tab of the male connector.
圧着部22は、導線圧着部23と、被覆圧着部24とを含む。導線圧着部23は、被覆圧着部24とボックス部21との間に位置する。被覆圧着部24は、後端部20Bに開口するとともに、電線10が後端部20Bから挿入可能なように、長手方向Xへ延びる断面中空形状を有する。圧着端子20は、表面が錫メッキされた黄銅等の銅合金条を平面展開した端子形状に打ち抜いた後(図示せず)、中空四角柱体のボックス部21と中空円柱体の圧着部22とから構成される立体的な端子形状に曲げ加工されて形成される。さらに、ボックス部21と圧着部22との間には、中空形状の内面を互いに水密に接触させた封止部26が設けられる。封止部26は、圧着部22の内面を互いに接触させ、水密に接合されることによって形成される。好ましくは、封止部26は、上下の金属同士が重なり合った部位(図2参照)の一部を接合する。例えば、上下の金属同士を、端子の長手方向の所定の長さだけ面接触させ、長手方向の略中央を接合する。すなわち、重なり部の端部以外を接合する。このような接合の方法として、例えば圧着やレーザ溶接を用いることができる。   The crimp part 22 includes a conductor crimp part 23 and a covering crimp part 24. The conducting wire crimping portion 23 is located between the covering crimping portion 24 and the box portion 21. The cover crimping part 24 has a hollow cross section extending in the longitudinal direction X so that the electric wire 10 can be inserted from the rear end part 20B while opening to the rear end part 20B. The crimping terminal 20 is formed by punching a copper alloy strip such as brass whose surface is tin-plated into a flattened terminal shape (not shown), and then forming a box portion 21 of a hollow quadrangular prism body and a crimping portion 22 of a hollow cylindrical body. It is formed by bending into a three-dimensional terminal shape composed of Furthermore, between the box part 21 and the crimping | compression-bonding part 22, the sealing part 26 which made the hollow inner surface contact mutually watertight is provided. The sealing portion 26 is formed by bringing the inner surfaces of the crimping portion 22 into contact with each other and being joined in a watertight manner. Preferably, the sealing part 26 joins a part of site | part (refer FIG. 2) where the upper and lower metals overlapped. For example, the upper and lower metals are brought into surface contact by a predetermined length in the longitudinal direction of the terminal, and the approximate center in the longitudinal direction is joined. That is, the portions other than the end portion of the overlapping portion are joined. As such a joining method, for example, pressure bonding or laser welding can be used.
圧着部22は、長手方向Xへ延びる接合部29によって水密に接合される。詳細には、端子形状に打ち抜いた銅合金条の端部を中空形状になるように互いに突合せ、突合せた部分をレーザ溶接等の溶接によって接合部29を形成することができる。   The crimping part 22 is joined in a watertight manner by a joining part 29 extending in the longitudinal direction X. Specifically, the end portions of the copper alloy strip punched into the terminal shape can be butted together so as to form a hollow shape, and the joined portion 29 can be formed by welding such as laser welding.
上記のような圧着部22において、被覆圧着部24には、径方向内側へ突出する凸条部25が形成される。凸条部25は、被覆圧着部24の周方向において環状に形成される。なお、凸条部25はプレス工程で端子を作る際に設けて、その後レーザ溶接を行っても良いし、電線10と圧着端子20の圧着工程の際に設けても良い。但し、プレス工程であらかじめ凸条部25を設けると、圧着端子20に電線10を挿入する際に邪魔になる恐れがある。また、レーザ溶接した際に凸条部25がなだらかになってしまう恐れもある。このため、以下の図面においては、圧着前の圧着端子に、すでに凸条部が形成されている例を示すが、後述する電線10との圧着時に、圧着と同時に金型によって凸条部25を設けることが望ましい。   In the pressure-bonding part 22 as described above, the covering pressure-bonding part 24 is formed with a ridge part 25 protruding inward in the radial direction. The ridge portion 25 is formed in an annular shape in the circumferential direction of the covering crimp portion 24. The protrusion 25 may be provided when a terminal is formed in the pressing process, and laser welding may be performed thereafter, or may be provided during the crimping process of the electric wire 10 and the crimp terminal 20. However, if the ridges 25 are provided in advance in the pressing process, there is a risk that the wire 10 may be disturbed when inserted into the crimp terminal 20. In addition, there is a risk that the ridges 25 become smooth when laser welding is performed. For this reason, in the following drawings, an example is shown in which a protrusion is already formed on a crimping terminal before crimping. It is desirable to provide it.
図3は、圧着端子20に電線10を挿入後、導線圧着部23および被覆圧着部24を径方向内側へ加締めたものであり、図4は、図3のIV−IV線断面図である。導線圧着部23には電線10の導線露出部11が位置し、被覆圧着部24には絶縁被覆部12が位置するように、電線10が挿入される。圧着部22の長手方向Xにおける寸法は、導線露出部11の長手方向Xにおける寸法よりも大きい。したがって、電線10を圧着部22に挿入すると、導線露出部11と絶縁被覆部12とが圧着部22の内周に対向して位置する。   FIG. 3 shows the crimping terminal 20 and the crimped crimping part 24 crimped radially inward after inserting the electric wire 10 into the crimping terminal 20, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3. . The electric wire 10 is inserted so that the conductive wire exposed portion 11 of the electric wire 10 is located in the conductive wire crimping portion 23 and the insulating coating portion 12 is located in the covering crimping portion 24. The dimension in the longitudinal direction X of the crimping part 22 is larger than the dimension in the longitudinal direction X of the conductor exposed part 11. Therefore, when the electric wire 10 is inserted into the crimping part 22, the conductive wire exposed part 11 and the insulating coating part 12 are positioned facing the inner periphery of the crimping part 22.
圧着部22に導線露出部11および絶縁被覆部12を挿入した状態で圧着部22を加締めることによって、導線圧着部23と導線露出部11の導線16とが圧着され、被覆圧着部24と絶縁被覆部12の絶縁体15とが圧着される。   By crimping the crimping part 22 with the conductor exposed part 11 and the insulation coating part 12 inserted into the crimping part 22, the conductor crimping part 23 and the conductor 16 of the conductor exposing part 11 are crimped and insulated from the coating crimping part 24. The insulator 15 of the covering portion 12 is pressure bonded.
被覆圧着部24には、凸条部25が設けられるから、圧着部22を加締めると、凸条部25によって絶縁被覆部12の一部が他の部分よりも強い力で圧着され、絶縁被覆部12の絶縁体15には高圧着部13が形成される。   Since the protruding crimp portion 24 is provided in the covering crimping portion 24, when the crimping portion 22 is caulked, a part of the insulating coating portion 12 is crimped by the protruding stripe portion 25 with a stronger force than the other portions, and the insulating coating is formed. A high pressure bonding portion 13 is formed on the insulator 15 of the portion 12.
図5は、ワイヤハーネス1の圧着方法の説明図である。図示したように、導線圧着部23および被覆圧着部24の圧着は、圧着工具30によって一体的におこなうことができる。圧着工具30は、上刃型31と下刃型32とによって構成される。上刃型31は、長手方向Xに延びる半円柱状の空洞を有し、被覆圧着部24に対応するとともに被覆圧着部24の半径よりも僅かに小さい半径を有する大径部34と、導線圧着部23に対応するとともに大径部34よりも小さい半径を有する小径部33とを備える。下刃型32は、長手方向Xに延びる半円柱状の空洞を有し、導線圧着部23および被覆圧着部24に対応するいずれの部分もその半径は同じである。   FIG. 5 is an explanatory diagram of a method for crimping the wire harness 1. As shown in the drawing, the crimping of the conductor crimping part 23 and the covering crimping part 24 can be performed integrally by the crimping tool 30. The crimping tool 30 includes an upper blade mold 31 and a lower blade mold 32. The upper blade mold 31 has a semi-cylindrical cavity extending in the longitudinal direction X, corresponds to the coating crimping portion 24, and has a large-diameter portion 34 having a radius slightly smaller than the radius of the coating crimping portion 24, and lead crimping A small-diameter portion 33 corresponding to the portion 23 and having a smaller radius than the large-diameter portion 34. The lower blade mold 32 has a semi-cylindrical cavity extending in the longitudinal direction X, and the radius of any part corresponding to the conductor crimping part 23 and the covering crimping part 24 is the same.
図6は、圧着工具30の大径部34における断面図である。上刃型31に噛み合った状態の下刃型32を仮想線で示す。図示したように、上刃型31の大径部34の半径よりも、下刃型32の半径のほうが僅かに小さく、これら圧着工具30でワイヤハーネス1を圧着処理する場合には、上刃型31の内側に下刃型32が噛み合う。このように噛み合った状態において、上刃型31の内面と下刃型32の内面とで、ほぼ円形となる。この時の直径は、加締め前の被覆圧着部24よりも小さいから、加締め処理によって被覆圧着部24の直径を小さくするように押圧し、電線10の絶縁被覆部12と被覆圧着部24とを圧着することができる。   FIG. 6 is a cross-sectional view of the large diameter portion 34 of the crimping tool 30. The lower blade mold 32 in a state of being engaged with the upper blade mold 31 is indicated by a virtual line. As shown in the drawing, the radius of the lower blade mold 32 is slightly smaller than the radius of the large diameter portion 34 of the upper blade mold 31, and when the wire harness 1 is crimped with the crimping tool 30, the upper blade mold is used. The lower blade mold 32 meshes with the inner side of 31. In this engaged state, the inner surface of the upper blade mold 31 and the inner surface of the lower blade mold 32 are substantially circular. Since the diameter at this time is smaller than the cover crimping part 24 before caulking, it is pressed so as to reduce the diameter of the cover crimping part 24 by caulking, Can be crimped.
なお、図示しないが圧着工具30の上刃型31の小径部33の内面と、下刃型32の内面とで構成される空間の直径は、導線圧着部23の直径よりも小さく、かつ、加締め後の被覆圧着部24の直径よりも小さい。したがって、導線圧着部23は、被覆圧着部24よりも強圧着となる。   Although not shown, the diameter of the space formed by the inner surface of the small diameter portion 33 of the upper blade die 31 of the crimping tool 30 and the inner surface of the lower blade die 32 is smaller than the diameter of the conductor crimping portion 23 and is added. It is smaller than the diameter of the coated crimping part 24 after tightening. Therefore, the conducting wire crimping portion 23 is stronger than the covering crimping portion 24.
圧着工具30の上刃型31および下刃型32を噛み合わせたとき、小径部33によって長手方向Xへ延びる中空円筒形が形成されるが、この形状に限定するものではない。圧着端子20と電線10の導線露出部11とが圧着される限りにおいて、さまざまな形状のものを採用することができる。例えば、扁平なものでもよいし、その断面形状が凸状になるようなものであってもよい。   When the upper blade mold 31 and the lower blade mold 32 of the crimping tool 30 are engaged with each other, a hollow cylindrical shape extending in the longitudinal direction X is formed by the small diameter portion 33, but the shape is not limited to this. As long as the crimp terminal 20 and the conductor exposed portion 11 of the electric wire 10 are crimped, various shapes can be employed. For example, a flat thing may be sufficient and the cross-sectional shape may become convex shape.
図7は、図6の圧着工具30のVIIで囲った部分の拡大図に、さらに電線10および圧着端子20を追記したものである。図示したように、上刃型31と下刃型32との噛み合い部分において、上刃型31の内面と、下刃型32の外面との間に僅かな隙間35が形成される。この隙間35に向かって、被覆圧着部24の押圧力が逃げるように移動し、被覆圧着部24には段部36が形成される可能性がある。このように段部36が形成されると、被覆圧着部24の内面には、径方向外側に窪み14が形成される可能性があり、この部分における圧着力が低下し、しいては、止水性が低下することが懸念される。   FIG. 7 is a diagram in which the electric wire 10 and the crimp terminal 20 are added to the enlarged view of the portion surrounded by VII of the crimp tool 30 of FIG. As shown in the figure, a slight gap 35 is formed between the inner surface of the upper blade mold 31 and the outer surface of the lower blade mold 32 at the meshing portion of the upper blade mold 31 and the lower blade mold 32. There is a possibility that a stepped portion 36 may be formed in the cover crimping portion 24, moving toward the gap 35 so that the pressing force of the cover crimping portion 24 escapes. When the stepped portion 36 is formed in this way, the inner surface of the cover crimping portion 24 may be formed with a depression 14 on the radially outer side, and the crimping force at this portion is reduced, and the There is a concern that the aqueousity will decrease.
図8は、ワイヤハーネス1の被覆圧着部24近傍を拡大したときの斜視図である。上述したように、圧着工具30を用いることによって、ワイヤハーネス1には、長手方向Xに延びる段部36および窪み14が形成される可能性があるが、凸条部25を設けることによって段部36および窪み14の少なくとも一部を径方向内側へと押圧することができる。したがって、少なくとも凸条部25を設けた位置においては、圧着力の低下を予防することができ、水分が圧着端子20の後端部20Bから侵入するのを確実に防止することができる。   FIG. 8 is a perspective view when the vicinity of the cover crimping portion 24 of the wire harness 1 is enlarged. As described above, by using the crimping tool 30, the wire harness 1 may be formed with the step portion 36 and the recess 14 extending in the longitudinal direction X. 36 and at least a part of the recess 14 can be pressed radially inward. Therefore, at least at the position where the ridge portion 25 is provided, a decrease in the crimping force can be prevented, and moisture can be reliably prevented from entering from the rear end portion 20B of the crimp terminal 20.
図9は、凸条部25を拡大した断面図である。この実施形態において、凸条部25の長手方向Xの寸法L1は、圧着部22での押圧の作用を受けていない部分における電線10の絶縁体15の厚さ寸法L2以下であって、好ましくは押圧の作用を受けている部分における絶縁体15の厚さ寸法以下である。圧着部22での押圧の作用を受けていない部分における絶縁体15の厚さ寸法L2とは、圧着部22に挿入されていない、露出された部分における絶縁体15の厚さ寸法である。換言すれば、圧着前の絶縁体15の厚さ寸法である。また、圧着部22の押圧力の作用を受けている部分における絶縁体15の厚さ寸法とは、圧着部22に挿入された部分であって、圧着後における絶縁体15の厚さ寸法である。絶縁体15は、圧着部22が圧着されることによって、圧着前よりもその厚さ寸法が小さくなる。   FIG. 9 is an enlarged cross-sectional view of the ridge portion 25. In this embodiment, the dimension L1 in the longitudinal direction X of the ridge portion 25 is equal to or less than the thickness dimension L2 of the insulator 15 of the electric wire 10 in the portion not subjected to the pressing action at the crimping portion 22, and preferably It is below the thickness dimension of the insulator 15 in the part which has received the effect | action of a press. The thickness dimension L2 of the insulator 15 in the portion not subjected to the pressing action at the crimping portion 22 is the thickness dimension of the insulator 15 in the exposed portion that is not inserted into the crimping portion 22. In other words, it is the thickness dimension of the insulator 15 before crimping. Moreover, the thickness dimension of the insulator 15 in the part which is receiving the action of the pressing force of the crimping part 22 is a part inserted into the crimping part 22 and is the thickness dimension of the insulator 15 after the crimping. . The insulator 15 has a thickness dimension smaller than that before press-bonding by press-bonding the press-bonding portion 22.
凸条部25を上記のような寸法にすることによって、被覆圧着部24の絶縁体15には周方向において環状に高い圧着力が作用する高圧着部13を設けることができる。特に、凸条部25の長手方向Xにおける寸法が小さいと、絶縁体15に略直交するように凸条部25が突出し、弾性を有する絶縁体15が急激に屈曲する。従って、急激な屈曲により絶縁体15と凸条部25との密着力が上がるので、後端部20Bからの水分の侵入を予防することができる。また、絶縁体15が長手方向Xに移動しにくくなるので、電線10が後端部20Bからの抜け方向に引っ張られたときも、抜けにくくなる。なお、絶縁体15の材質によっても異なるが、凸条部25の寸法L1が小さすぎると、経年劣化によって圧着力の低下が生じる可能性があるので、その寸法は適宜変更することが望ましい。   By making the ridges 25 have the dimensions as described above, the insulator 15 of the covering crimping portion 24 can be provided with the high crimping portion 13 in which a high crimping force acts in a ring shape in the circumferential direction. In particular, when the dimension in the longitudinal direction X of the ridge portion 25 is small, the ridge portion 25 protrudes so as to be substantially orthogonal to the insulator 15, and the insulator 15 having elasticity is bent sharply. Therefore, since the adhesive force between the insulator 15 and the ridge portion 25 is increased by the rapid bending, it is possible to prevent moisture from entering from the rear end portion 20B. In addition, since the insulator 15 is less likely to move in the longitudinal direction X, it is difficult for the electric wire 10 to be pulled out even when the electric wire 10 is pulled in the pulling direction from the rear end portion 20B. In addition, although it changes with the materials of the insulator 15, since the crimping | compression-bonding force may fall by aged deterioration if the dimension L1 of the protruding item | line part 25 is too small, it is desirable to change the dimension suitably.
凸条部25の径方向の寸法L3は、絶縁被覆部12に形成された窪み14の寸法L4以上である。窪み14の寸法L4とは、窪み14が形成されない理想の絶縁体15の外面である理想外面17と、窪み14が形成された場合に理想外面17からの距離が最も大きくなる最大点までの径方向における寸法である(図7参照)。したがって、凸条部25によって、窪み14が部分的に完全に押圧され、窪み14によって圧着力が低下するのを予防することができる。なお、凸条部25のより詳細な適切な形状については、後述する。   The radial dimension L3 of the ridge 25 is equal to or greater than the dimension L4 of the recess 14 formed in the insulating coating 12. The dimension L4 of the recess 14 is the diameter from the ideal outer surface 17 that is the outer surface of the ideal insulator 15 where the recess 14 is not formed, to the maximum point where the distance from the ideal outer surface 17 is the largest when the recess 14 is formed. It is the dimension in a direction (refer FIG. 7). Therefore, it is possible to prevent the depression 14 from being partially pressed completely by the ridges 25 and the crimping force from being lowered by the depression 14. In addition, the more detailed appropriate shape of the protruding item | line part 25 is mentioned later.
絶縁被覆部12において、導線16を覆う絶縁体15として、弾性を有するポリ塩化ビニル(PVC)、ポリエチレン等、この技術の分野において通常用いられるものを選択することができる。なお、通常、導体断面積が0.75sq(約0.75mm)の電線は、絶縁被覆部の厚みが0.2mmであり、導体断面積が2.5sqの電線は、絶縁被覆部の厚みが0.35mmであり、導体断面積が8sqの電線は、絶縁被覆部の厚みが0.8mmである。 In the insulation coating portion 12, as the insulator 15 covering the conductive wire 16, a material usually used in the field of this technology such as elastic polyvinyl chloride (PVC) or polyethylene can be selected. In general, an electric wire having a conductor cross-sectional area of 0.75 sq (about 0.75 mm 2 ) has an insulating coating portion thickness of 0.2 mm, and an electric wire having a conductor cross-sectional area of 2.5 sq is an insulating coating portion thickness. Is 0.35 mm, and the conductor cross-sectional area of the electric wire with 8 sq has an insulation coating portion thickness of 0.8 mm.
上記のようなワイヤハーネス1において、電線10の導線16はアルミニウム系材料で構成され、圧着端子20の導線圧着部23は銅系材料で構成されているから、導線圧着部23では、異種金属が接触する。異種金属が接触した部分では、水分が付着することによって電食の可能性があるが、この実施形態では、圧着部22への水分の侵入を防止することができるので、電食を予防することができる。また、この実施形態によれば、絶縁体15の材料として通常用いられる材料を用いても、確実に圧着部22への水分の侵入を防止することができる。   In the wire harness 1 as described above, the conducting wire 16 of the electric wire 10 is made of an aluminum-based material, and the conducting wire crimping portion 23 of the crimp terminal 20 is made of a copper-based material. Contact. There is a possibility of electrolytic corrosion due to moisture adhering at the part where the different metal contacts, but in this embodiment, it is possible to prevent the penetration of moisture into the crimping part 22 and thus prevent electrolytic corrosion. Can do. Further, according to this embodiment, even if a material normally used as the material of the insulator 15 is used, it is possible to reliably prevent moisture from entering the crimping portion 22.
この実施形態において、凸条部25の断面形状は半円状にしているが(図9参照)、この形状に限定するものではない。その断面形状が、矩形、三角形などの多角形等を有するものであってもよい。また、凸条部25の断面形状が、長手方向Xに平行延びる軸線に対して傾斜するようにしてもよい。すなわち、前端部20A側から後端部20B側に向かって、凸条部25先端における被覆圧着部の径が大きくなるように傾斜していてもよい。このように傾斜することによって、後端部20B側から電線10を挿入したときには比較的挿入しやすいが、その逆方向には移動しにくく、挿入した電線10を抜けにくくすることができる。このように、凸条部25の断面形状は、長手方向に対する中心線に対して対称に形成されなくてもよく、長手方向のいずれかの方向に対して斜め方向(長手方向に対する中心線に対して非対称)に形成されてもよい。   In this embodiment, the cross-sectional shape of the ridge portion 25 is semicircular (see FIG. 9), but is not limited to this shape. The cross-sectional shape may be a polygon such as a rectangle or a triangle. Further, the cross-sectional shape of the ridge portion 25 may be inclined with respect to an axis extending in parallel with the longitudinal direction X. That is, you may incline so that the diameter of the covering crimping | compression-bonding part in the front-end | tip part of the protruding item | line part 25 may become large toward the rear-end part 20B side from the front-end part 20A side. By inclining in this way, when the electric wire 10 is inserted from the rear end 20B side, it is relatively easy to insert, but it is difficult to move in the opposite direction, and the inserted electric wire 10 can be made difficult to come off. Thus, the cross-sectional shape of the ridge portion 25 does not have to be formed symmetrically with respect to the center line with respect to the longitudinal direction, and is oblique with respect to any direction in the longitudinal direction (with respect to the center line with respect to the longitudinal direction). Asymmetric).
圧着工具30は上刃型31と下刃型32との二つの刃型によって圧着端子20の周囲から圧着するようにしているが、三つ以上の刃型を有するものであってもよい。例えば、三つの刃型を有する圧着工具30を用いた場合には、絶縁被覆部12の絶縁体15には三条の窪み14が形成される可能性がある。しかし、凸条部25を環状にすることによって、いずれの窪み14においても圧着力の低下を抑制することができる。   The crimping tool 30 is crimped from the periphery of the crimp terminal 20 by two blade molds of the upper blade mold 31 and the lower blade mold 32, but may have three or more blade molds. For example, when the crimping tool 30 having three blade types is used, there is a possibility that the three recesses 14 are formed in the insulator 15 of the insulating coating portion 12. However, it is possible to suppress a decrease in the pressure-bonding force in any of the recesses 14 by making the ridge portion 25 annular.
<第2の実施形態>
第2の実施形態において、第1の実施形態と同様の構成要件については、第1の実施形態と同じ符号を用い、その構成要件については詳細な説明を省略する。この実施形態では、凸条部を長手方向Xに二つ設けたことを特徴とする。
<Second Embodiment>
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed descriptions thereof are omitted. This embodiment is characterized in that two ridges are provided in the longitudinal direction X.
図10は第2の実施形態のワイヤハーネス1の斜視図であって、加締め後の状態を示し、図11は図10のXI−XI線断面図である。被覆圧着部24には、凸条部25A,25Bが設けられる。凸条部25A,25Bは、圧着部22の周方向において連続した環状に形成される。凸条部25Aと凸条部25Bとは、長手方向Xに離間して設けられる。   FIG. 10 is a perspective view of the wire harness 1 of the second embodiment, showing a state after crimping, and FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. The covering crimping portion 24 is provided with protruding strip portions 25A and 25B. The ridge portions 25 </ b> A and 25 </ b> B are formed in a continuous annular shape in the circumferential direction of the crimping portion 22. The ridge portions 25A and the ridge portions 25B are provided to be separated in the longitudinal direction X.
図12は、凸条部25A,25Bを拡大した斜視図である。凸条部25Aと凸条部25Bとの離間寸法D1は、電線10の絶縁体15の厚さの寸法D2の6倍以下である。離間寸法D1は、対向する凸条部25Aおよび凸条部25Bの内端の間を測定する。また、絶縁体15の厚さ寸法D2とは、圧着部22での押圧の作用を受けていない部分における寸法をいう。具体的には、圧着部22に挿入されていない、露出された部分における絶縁体15の厚さ寸法である。換言すれば、圧着前の絶縁体15の厚さ寸法である。   FIG. 12 is an enlarged perspective view of the ridges 25A and 25B. The spacing dimension D1 between the protruding line part 25A and the protruding line part 25B is not more than 6 times the dimension D2 of the thickness of the insulator 15 of the electric wire 10. The separation dimension D <b> 1 is measured between the inner ends of the protruding ridge portions 25 </ b> A and the protruding ridge portions 25 </ b> B. In addition, the thickness dimension D2 of the insulator 15 refers to a dimension at a portion not subjected to the pressing action at the crimping portion 22. Specifically, it is the thickness dimension of the insulator 15 in the exposed portion that is not inserted into the crimping portion 22. In other words, it is the thickness dimension of the insulator 15 before crimping.
<第3の実施形態>
次に、さらに他の実施の形態について説明する。図13は、圧着工具30aを用いて、電線10と圧着端子20とを接続する方法を示す図である。圧着工具30aは、圧着工具30とは異なり、凸条部25A、25Bを形成するための凸部37を有する。すなわち、図13に示す方法は、前述したように、予め凸条部25(25A、25B)が形成された圧着端子20を圧着するのではなく、圧着時に、凸条部25(25A、25B)を同時に形成するものである。なお、以下の説明では、電線10として、例えば外径が0.9mm〜6.9mm程度のものを想定し、また、圧着端子20の板厚は0.15〜0.60mm程度のものを想定する。
<Third Embodiment>
Next, another embodiment will be described. FIG. 13 is a diagram illustrating a method of connecting the electric wire 10 and the crimp terminal 20 using the crimp tool 30a. Unlike the crimping tool 30, the crimping tool 30 a has a convex portion 37 for forming the convex strip portions 25 </ b> A and 25 </ b> B. That is, as described above, the method shown in FIG. 13 does not crimp the crimp terminal 20 on which the projections 25 (25A, 25B) are formed in advance, but at the time of crimping, the projections 25 (25A, 25B). Are formed at the same time. In the following description, the electric wire 10 is assumed to have, for example, an outer diameter of about 0.9 mm to 6.9 mm, and the plate thickness of the crimp terminal 20 is assumed to be about 0.15 to 0.60 mm. To do.
圧着工具30aは、圧着工具30と同様に、上刃型31と下刃型32とによって構成される。被覆圧着部24に対応する位置であって、上刃型31と、下刃型32の互いに対向する位置には、凸部37が形成される。なお、図示した例では、凸部37が長手方向に2か所形成される例を示すが、凸部37は1か所であってもよく、3か所以上の複数個所に形成されてもよい。   Similar to the crimping tool 30, the crimping tool 30 a includes an upper blade mold 31 and a lower blade mold 32. A convex portion 37 is formed at a position corresponding to the cover crimping portion 24 and at a position where the upper blade mold 31 and the lower blade mold 32 face each other. In the illustrated example, an example in which the convex portion 37 is formed at two locations in the longitudinal direction is shown, but the convex portion 37 may be formed at one location, or may be formed at a plurality of three or more locations. Good.
図13に示すように、圧着部22に電線10の先端(導線露出部11および絶縁被覆部12の一部)を挿入した状態で、上刃型31と下刃型32とを閉じることで、電線10と圧着端子20とが接続される。   As shown in FIG. 13, by closing the upper blade mold 31 and the lower blade mold 32 in a state where the tip of the electric wire 10 (a part of the conductive wire exposed portion 11 and the insulating coating portion 12) is inserted into the crimping portion 22, The electric wire 10 and the crimp terminal 20 are connected.
図14は、電線10と圧着端子20とが圧着によって接続された状態を示す図である。圧着端子20は、導線圧着部23によって導線露出部11を圧着し、被覆圧着部24によって絶縁被覆部12を圧着する。この際、被覆圧着部24には、凸部37に対応する位置に凸条部25A、25Bが形成される。すなわち、凸部37によって、被覆圧着部24が他の部位よりも強く圧縮されて、被覆圧着部24の内面側に突出する凸条部25A、25Bが形成される。   FIG. 14 is a diagram illustrating a state where the electric wire 10 and the crimp terminal 20 are connected by crimping. The crimp terminal 20 crimps the conductor exposed portion 11 by the conductor crimp portion 23 and crimps the insulating coating portion 12 by the coating crimp portion 24. At this time, the protruding strip portions 25 </ b> A and 25 </ b> B are formed in the covering crimping portion 24 at positions corresponding to the protruding portions 37. That is, the convex portion 37 compresses the coated crimping portion 24 more strongly than the other portions, thereby forming the protruding strip portions 25 </ b> A and 25 </ b> B that protrude to the inner surface side of the coated crimped portion 24.
ここで、被覆圧着部24の長さ(被覆圧着部に挿入されている絶縁被覆部12の長さであって、図中Bで示す長さ)は、2mm以上であることが望ましく、さらに望ましくは2.5〜5.0mmである。被覆圧着長さが短すぎると、絶縁被覆部12の圧着が不十分となり、水密が保てなくなる恐れがある。また、被覆圧着長さが長すぎると、端子自体が必要以上に長くなる。   Here, the length of the coated crimping portion 24 (the length of the insulating coating portion 12 inserted in the coated crimped portion and indicated by B in the figure) is desirably 2 mm or more, and more desirably. Is 2.5 to 5.0 mm. If the coating crimping length is too short, the insulation coating 12 may not be crimped sufficiently and watertightness may not be maintained. On the other hand, if the covering crimping length is too long, the terminal itself becomes longer than necessary.
また、凸条部25A(25B)における被覆圧着部の圧縮率は、45%〜90%であることが望ましい。図15(a)は、圧縮前の凸条部25A(25B)に対応する部位の被覆圧着部24における断面図である。また、図15(b)は、圧縮後の凸条部25A(25B)に対応する部位の被覆圧着部24における断面図である。   Moreover, as for the compression rate of the covering crimping | compression-bonding part in 25 A of ridge parts (25B), it is desirable that it is 45%-90%. FIG. 15A is a cross-sectional view of the cover crimping portion 24 at a portion corresponding to the ridge portion 25A (25B) before compression. Moreover, FIG.15 (b) is sectional drawing in the coating | bonding crimping | compression-bonding part 24 of the site | part corresponding to the convex strip part 25A (25B) after compression.
被覆圧着部の圧縮率は、以下のようにして求められる。まず、圧縮前の被覆圧着部24の外周面によって形成される円の断面積をA0とする。また、圧縮後における凸条部25A(25B)の先端部における被覆圧着部24の外周面によって形成される略円形状の断面積をA1とする。この場合、圧縮率は、A1/A0で算出される。すなわち、圧縮率が100%とは、被覆圧着部24が圧縮されていないことを指し、圧縮率50%とは、圧縮前の被覆圧着部24の外径から算出される断面積が半分になるまで、被覆圧着部24が圧縮されたことを意味する。   The compression rate of the coated crimping part is obtained as follows. First, let A0 be the cross-sectional area of a circle formed by the outer peripheral surface of the coated crimping part 24 before compression. Moreover, let A1 be a substantially circular cross-sectional area formed by the outer peripheral surface of the cover crimping portion 24 at the tip end portion of the protruding strip portion 25A (25B) after compression. In this case, the compression rate is calculated as A1 / A0. That is, a compression rate of 100% means that the coated crimping part 24 is not compressed, and a compression rate of 50% means that the cross-sectional area calculated from the outer diameter of the coated crimped part 24 before compression is halved. This means that the cover crimping portion 24 has been compressed.
圧縮率が45%を下回ると、圧縮が強すぎるため、絶縁体15が破ける恐れがある。また、圧縮率が90%を超えると、圧縮量が少なすぎるため、十分に止水性を確保することが困難となる。   When the compression rate is less than 45%, the insulator 15 may be broken because the compression is too strong. On the other hand, if the compression ratio exceeds 90%, the amount of compression is too small, and it becomes difficult to ensure sufficient water stopping properties.
図16は、圧着後の被覆圧着部24の部分拡大断面図であり、図14のA部拡大図である。前述したように、被覆圧着部24には、圧着工具30aに形成された凸部37に対応した凸条部25A、25Bが形成される。なお、図では、圧着工具30aの一部を示すが、以下の説明では、圧着工具30aから圧着端子20を取り出した後のスプリングバック等を加味した寸法について説明する。また、凸条部25A、25Bの形状は、いずれも同様とし、図示した例とは凸条部の数が異なる場合でも、以下の説明は適用可能とする。   FIG. 16 is a partial enlarged cross-sectional view of the coated crimping part 24 after crimping, and is an enlarged view of part A in FIG. As described above, the coated crimping portion 24 is formed with the convex strip portions 25A and 25B corresponding to the convex portion 37 formed on the crimping tool 30a. In the figure, a part of the crimping tool 30a is shown, but in the following description, dimensions including the spring back after the crimping terminal 20 is taken out from the crimping tool 30a will be described. Further, the shape of the ridge portions 25A and 25B is the same, and the following description is applicable even when the number of ridge portions is different from the illustrated example.
凸条部25A、25Bの高さ(図中Dであって、凸条部25A、25B以外の部位の被覆圧着部24の最大内径の内面に対する、凸条部25A、25B先端の高さ)は、圧着端子20(被覆圧着部24)の肉厚(図中Cであって、凸条部25A、25B以外の部位の最大内径である部位の肉厚)以下であることが望ましい。凸条部25A、25Bの高さが高すぎると、被覆圧着部24(凸条部25A、25B)の板厚が薄くなりすぎるため望ましくない。   The height of the ridges 25A and 25B (D in the figure, the height of the tips of the ridges 25A and 25B with respect to the inner surface of the maximum inner diameter of the coated crimping part 24 at a portion other than the ridges 25A and 25B) The thickness of the crimp terminal 20 (the coated crimp part 24) is preferably equal to or less than the thickness (C in the figure, which is the thickness of a part that is the maximum inner diameter of the part other than the protruding strips 25A and 25B). If the height of the ridges 25A and 25B is too high, the plate thickness of the coated crimping part 24 (projection ridges 25A and 25B) becomes too thin, which is not desirable.
一方、凸条部25A、25Bの高さが低すぎると、凸条部25A、25Bの効果が十分に得られない。このため、凸条部25A、25Bの高さは、圧着端子20(被覆圧着部24)の肉厚の0.5倍以上であることが望ましい。例えば、板厚が0.25mmの場合には、凸条部25A、25Bの高さは、0.125mm〜0.25mmとすればよく、特に望ましくは、0.125〜0.15mmである。   On the other hand, if the height of the ridges 25A and 25B is too low, the effects of the ridges 25A and 25B cannot be obtained sufficiently. For this reason, it is desirable that the height of the protrusions 25A and 25B is 0.5 times or more the wall thickness of the crimp terminal 20 (cover crimp part 24). For example, when the plate thickness is 0.25 mm, the height of the ridge portions 25A and 25B may be 0.125 mm to 0.25 mm, and particularly preferably 0.125 to 0.15 mm.
また、凸条部25A、25Bの幅(長手方向の長さ)は以下のように定義する。凸条部25A、25Bの先端部は、必ずしも明確な凸形状を有さず、凸条部25A、25Bとそれ以外の部位との境界が不明瞭となる恐れがある。このため、本発明では、凸条部25A、25Bの幅(長手方向の長さ)を、これに対応する被覆圧着部24の外周面側の凹部の幅で定義する。   Moreover, the width | variety (length of a longitudinal direction) of convex part 25A, 25B is defined as follows. The tips of the ridges 25A and 25B do not necessarily have a clear convex shape, and the boundaries between the ridges 25A and 25B and other parts may become unclear. For this reason, in this invention, the width | variety (length of a longitudinal direction) of convex part 25A, 25B is defined by the width | variety of the recessed part by the side of the outer peripheral surface of the covering crimping | compression-bonding part 24 corresponding to this.
ここで、圧着工具30aの凸部37の基部の幅(図中F)に対して、凸条部25A、25Bに対応する被覆圧着部24の外周面側の凹部の幅(図中E)は、わずかに大きくなる。そこで、本発明では、凹部以外の部位の外周面における直線部と、凹部の内壁面における直線部との交点を凸条部25A、25Bの幅の起点とする。すなわち、凹部の幅は、概ね、凸部37の幅と一致する。   Here, with respect to the width of the base portion of the convex portion 37 of the crimping tool 30a (F in the drawing), the width of the concave portion (E in the drawing) on the outer peripheral surface side of the coated crimping portion 24 corresponding to the convex strip portions 25A and 25B is Slightly bigger. Therefore, in the present invention, the intersection of the straight line portion on the outer peripheral surface of the portion other than the concave portion and the straight line portion on the inner wall surface of the concave portion is set as the starting point of the width of the convex portions 25A and 25B. That is, the width of the concave portion substantially matches the width of the convex portion 37.
このようにして定義される凸条部25A、25Bの幅は、0.20mm〜0.90mmであることが望ましい。凸条部25A、25Bの幅が狭すぎると、圧着工具における凸部37の幅が小さくなるため、凸部37の破損の恐れがある。一方、凸条部25A、25Bの幅が広すぎると、必要以上に端子全体の長さが長くなるためである。この際、被覆圧着部の外面の凹部の長手方向長さは、被覆圧着部の長さの10%以上とすることが望ましい。このようにすると圧着部における防食をより確実に確保することができる。なお、凸条部の個数×幅が、被覆圧着部の長さの1/2以下とすることが望ましい。例えば、凸条部25A、25Bを二つ形成するためには、凸条部の幅は、被覆圧着部の長さの1/4以下とすることが望ましい。このようにすることで、刃型凹凸形状の端子圧着凹凸形状への転写が優れる。例えば、被覆圧着部長さを3mmとした場合には、凸条部25A、25Bの幅は、0.75mm以下とすることが望ましい。   The width of the ridges 25A and 25B defined in this way is preferably 0.20 mm to 0.90 mm. If the widths of the protrusions 25A and 25B are too narrow, the width of the protrusions 37 in the crimping tool becomes small, and the protrusions 37 may be damaged. On the other hand, if the widths of the protrusions 25A and 25B are too wide, the length of the entire terminal becomes longer than necessary. At this time, the length in the longitudinal direction of the concave portion on the outer surface of the coated crimping portion is desirably 10% or more of the length of the coated crimped portion. If it does in this way, corrosion prevention in a crimping | compression-bonding part can be ensured more reliably. In addition, it is desirable that the number of projections × width is ½ or less of the length of the coated crimping portion. For example, in order to form two ridges 25A and 25B, it is desirable that the width of the ridges be ¼ or less of the length of the coated crimping part. By doing in this way, the transcription | transfer to the terminal crimping uneven | corrugated shape of a blade-shaped uneven | corrugated shape is excellent. For example, when the length of the coated crimping portion is 3 mm, it is desirable that the widths of the protruding strip portions 25A and 25B be 0.75 mm or less.
なお、凸部37の形状は、図示したように、先端の幅が狭くなるような台形型や、先端の幅が狭くなるような円弧状とすることが望ましい。このようにすることで、圧着工具の強度を保ちつつ、必要な高さの凸条部を形成することが容易である。例えば、0.15mm程度の高さの図示したような台形の凸部37に対しては、凸部37の基部の幅が0.20mm〜0.90mmに対して、先端部の幅を0.10mm〜0.80mm程度にすればよい。   As shown in the figure, the shape of the convex portion 37 is preferably a trapezoidal shape in which the width of the tip is narrowed or an arc shape in which the width of the tip is narrowed. By doing in this way, it is easy to form the protruding item | line part of required height, maintaining the intensity | strength of a crimping | compression-bonding tool. For example, for a trapezoidal convex portion 37 as shown in the drawing having a height of about 0.15 mm, the width of the tip portion is set to 0.2 mm to 0.90 mm with respect to the width of the base portion of the convex portion 37. What is necessary is just to be about 10 mm-0.80 mm.
また、複数の凸条部25A、25Bを形成する場合において、凸条部25A、25Bのピッチ(図中Gであって、例えば凸条部中心同士の間隔とすることができる。なお、エッジがなくても、半円状であればその中心同士の間隔としてもよい。)は、0.5〜2.0mmとすることが望ましく、さらに望ましくは、0.8〜1.4mmである。ピッチが狭すぎると、圧着工具30aの凸部37間の溝幅(図中I)が狭くなるため、圧着工具30aの製造性が悪く、また、凸条部同士が接近しすぎるため、凸条部を複数形成する効果が薄れる。したがって、凸条部25A、25Bのピッチは、端子板厚の1.5倍以上とすることが望ましい。また、ピッチが広すぎると必要以上に端子全体の長さが長くなり、小型化の妨げとなる。さらに、凸状部同士の間に挟まれた絶縁被覆部の応力が低下し、止水性が低下する恐れがある。   Further, in the case of forming the plurality of ridges 25A and 25B, the pitch of the ridges 25A and 25B (G in the figure, for example, the interval between the centers of the ridges can be used. If it is not semicircular, the distance between the centers may be 0.5 to 2.0 mm, more preferably 0.8 to 1.4 mm. If the pitch is too narrow, the groove width (I in the figure) between the convex portions 37 of the crimping tool 30a becomes narrow, so that the manufacturability of the crimping tool 30a is poor, and the convex strip portions are too close to each other. The effect of forming a plurality of parts is reduced. Therefore, it is desirable that the pitch of the ridge portions 25A and 25B is 1.5 times or more the terminal board thickness. On the other hand, if the pitch is too wide, the length of the entire terminal becomes longer than necessary, which hinders downsizing. Furthermore, the stress of the insulation coating part pinched | interposed between convex-shaped parts may fall, and there exists a possibility that a water stop may fall.
また、被覆圧着部24の外面側において、凸条部25Bに対応する凹部の基部の後端側から、被覆圧着部24の後端までの略直線部の長さ(図中H)は、0.5mm以上とすることが望ましい。この長さが短すぎると、圧着時に、被覆圧着部24の後端部がラッパ状に開いてしまい、破損や止水性に対して不利となるためである。   Further, on the outer surface side of the coated crimping portion 24, the length (H in the drawing) of the substantially linear portion from the rear end side of the base portion of the concave portion corresponding to the ridge portion 25B to the rear end of the coated crimped portion 24 is 0. .5 mm or more is desirable. This is because if the length is too short, the rear end portion of the coated crimping portion 24 opens in a trumpet shape during crimping, which is disadvantageous for breakage and waterstop.
また、被覆圧着部24の押し込み深さ(図中J)は、圧着対象の絶縁被覆部12の圧着前の絶縁体15の厚みTに対して、周方向の少なくとも一部が75%以下であることが望ましい。すなわち、J/Tが0.75以下であることが望ましい。被覆圧着部24の押し込み深さが、絶縁体15の厚みに対して小さすぎると、凸条部25A、5Bの効果が十分得られない。また、被覆圧着部24の押し込み深さが、絶縁体15の厚みに対して大きすぎると、絶縁体15が破ける恐れがあるためである。なお、絶縁被覆の厚みが0.2〜0.35mmであれば、J/Tの割合は、13%以上であることが望ましい。   Further, the indentation depth (J in the figure) of the cover crimping portion 24 is 75% or less at least in the circumferential direction with respect to the thickness T of the insulator 15 before crimping of the insulation coating portion 12 to be crimped. It is desirable. That is, it is desirable that J / T is 0.75 or less. If the indentation depth of the cover crimping portion 24 is too small with respect to the thickness of the insulator 15, the effects of the ridge portions 25 </ b> A and 5 </ b> B cannot be obtained sufficiently. Moreover, it is because there exists a possibility that the insulator 15 may be torn if the indentation depth of the covering crimping part 24 is too large with respect to the thickness of the insulator 15. If the thickness of the insulation coating is 0.2 to 0.35 mm, the ratio of J / T is desirably 13% or more.
なお、上述した凸条部等の各形態は、実施例1、2に対しても適用可能である。   In addition, each form, such as a protruding item | line part mentioned above, is applicable also to Example 1,2.
<実験例1>
上記のようなワイヤハーネス1において、電線10の絶縁被覆部12から圧着端子20に向かって空気を送り、後端部20Bから空気が漏れるか否かについて実験した。図17には、実験方法の概要を示す。実験は、水を入れた水槽41中に電線10を圧着した圧着端子20を入れ、電線10の端部から圧着端子20に向かってレギュレータ42によって加圧空気を送った。加圧空気は、50kpaで30秒間吐出した。
<Experimental example 1>
In the wire harness 1 as described above, air was sent from the insulation coating portion 12 of the electric wire 10 toward the crimp terminal 20, and an experiment was conducted as to whether air leaks from the rear end portion 20B. FIG. 17 shows an outline of the experimental method. In the experiment, the crimp terminal 20 that crimped the electric wire 10 was put in a water tank 41 containing water, and pressurized air was sent from the end of the electric wire 10 toward the crimp terminal 20 by the regulator 42. Pressurized air was discharged at 50 kpa for 30 seconds.
ワイヤハーネス1として、対照サンプルおよびサンプル1〜4を準備し、それぞれのサンプル数をn=10とした。対照サンプルは、被覆圧着部24に凸条部を設けない圧着端子20を用いたワイヤハーネスである。サンプル1は、二つの凸条部25A,25Bの離間寸法D1が絶縁体15の厚さ寸法D2の8倍である圧着端子20を用いたワイヤハーネスである。サンプル2は、離間寸法D1が、絶縁体15の厚さ寸法D2の6倍である圧着端子20を用いたワイヤハーネスである。サンプル3は、離間寸法D1が、絶縁体15の厚さ寸法D2の5倍である圧着端子20を用いたワイヤハーネスである。サンプル4は、離間寸法D1が、絶縁体15の厚さ寸法D2の4倍である圧着端子20を用いたワイヤハーネスである。サンプル3およびサンプル4はこの実施形態にかかるワイヤハーネスである。また、対照サンプルについては、120℃で24時間加熱したワイヤハーネスおよびそのような加熱をしないワイヤハーネスを準備した。サンプル1〜4では、120℃で24時間、および120時間加熱したワイヤハーネスおよびそのような加熱をしないワイヤハーネスを準備した。ワイヤハーネス1は、高温環境下において使用されることもあり、特にこのように高温環境下で使用された場合には、絶縁体15の弾性が低下し、圧着部22と絶縁被覆部12との間の圧着力が低下する傾向にある。この実験では、高温環境下におけるワイヤハーネス1の使用の耐久性を確認することができる。   As the wire harness 1, a control sample and samples 1 to 4 were prepared, and the number of each sample was set to n = 10. The control sample is a wire harness using the crimp terminal 20 in which the protruding crimp part is not provided in the coated crimp part 24. Sample 1 is a wire harness using a crimp terminal 20 in which the distance D1 between the two ridges 25A and 25B is eight times the thickness D2 of the insulator 15. Sample 2 is a wire harness using a crimp terminal 20 having a separation dimension D1 that is six times the thickness dimension D2 of the insulator 15. Sample 3 is a wire harness using a crimp terminal 20 having a separation dimension D1 that is five times the thickness dimension D2 of the insulator 15. Sample 4 is a wire harness using a crimp terminal 20 in which the separation dimension D1 is four times the thickness dimension D2 of the insulator 15. Sample 3 and sample 4 are wire harnesses according to this embodiment. Moreover, about the control sample, the wire harness heated at 120 degreeC for 24 hours and the wire harness which does not perform such a heating were prepared. In Samples 1 to 4, a wire harness heated at 120 ° C. for 24 hours and 120 hours and a wire harness without such heating were prepared. The wire harness 1 may be used in a high-temperature environment, and particularly when used in such a high-temperature environment, the elasticity of the insulator 15 is reduced, and the crimping portion 22 and the insulating coating portion 12 are separated. There exists a tendency for the crimping force between to fall. In this experiment, it is possible to confirm the durability of the use of the wire harness 1 in a high temperature environment.
表1に示したように、圧着端子20の後端部20Bからの空気の漏れがなかったものについては、「N」を記入し、漏れがあった場合には、漏れたときの圧力を記入している。空気の漏れは、気泡を目視で確認することによりおこなった。   As shown in Table 1, enter “N” for those where there was no air leakage from the rear end 20B of the crimp terminal 20, and if there was a leak, enter the pressure at the time of leakage. doing. Air leakage was performed by visually checking the bubbles.
凸条部25を設けない対照サンプルにおいて、加熱処理をしない場合には、空気の漏れはいずれも確認されなかったが、24時間の加熱処理では、いずれも1KPa以下で空気の漏れが確認された。サンプル1〜4においても、加熱処理をしない場合には、空気の漏れはいずれも確認されなかった。   In the control sample not provided with the ridges 25, when no heat treatment was performed, no air leakage was confirmed, but in the 24-hour heat treatment, air leakage was confirmed at 1 KPa or less. . In Samples 1 to 4, no air leakage was confirmed when no heat treatment was performed.
サンプル1において、24時間の加熱処理では、7つのサンプルで空気の漏れは確認されなかったが、1つが30KPa、2つが20KPaの圧力で空気の漏れが確認された。120時間の加熱処理では、いずれも1〜3KPaの圧力で空気の漏れが確認された。   In sample 1, in the heat treatment for 24 hours, no air leakage was confirmed in 7 samples, but air leakage was confirmed at a pressure of 30 KPa for one and two for 20 KPa. In the heat treatment for 120 hours, air leakage was confirmed at a pressure of 1 to 3 KPa in all cases.
サンプル2において、24時間の加熱処理では、8つのサンプルで空気の漏れは確認されなかったが、1つが40KPa、1つが50KPaの圧力で空気の漏れが確認された。120時間の加熱処理では、5つのサンプルで空気の漏れは確認されなかったが、残りの5つのサンプルで5〜30KPaの圧力で空気の漏れが確認された。   In sample 2, in the heat treatment for 24 hours, no air leakage was confirmed in eight samples, but one was confirmed to be air leakage at a pressure of 40 KPa and one was 50 KPa. In the heat treatment for 120 hours, no air leakage was confirmed in the five samples, but air leakage was confirmed in the remaining five samples at a pressure of 5 to 30 KPa.
サンプル3およびサンプル4では、24時間の加熱処理、120時間の加熱処理のいずれにおいても空気の漏れは確認されなかった。したがって、凸条部25の離間寸法D1は、絶縁体15の厚さ寸法D2の5倍以下であることによって、高温環境下でワイヤハーネス1を使用した場合であっても、圧着端子20内部、特に導線圧着部23内を水密に保持することができることが証明された。離間寸法D1を絶縁体15の厚さ寸法D2の5倍以下にすることによって、凸条部25Aおよび凸条部25Bの長手方向Xにおける離間部に絶縁体15が食い込むように入ることができるので、水密性が向上するものと推察される。   In Sample 3 and Sample 4, no air leakage was observed in either the 24-hour heat treatment or the 120-hour heat treatment. Therefore, even when the wire harness 1 is used in a high-temperature environment, the separation dimension D1 of the ridge portion 25 is not more than five times the thickness dimension D2 of the insulator 15, In particular, it was proved that the inside of the lead wire crimping portion 23 can be kept watertight. By setting the separation dimension D1 to be not more than 5 times the thickness dimension D2 of the insulator 15, the insulator 15 can penetrate into the separation portions in the longitudinal direction X of the protruding strip portion 25A and the protruding strip portion 25B. It is assumed that water tightness is improved.
上記のとおり、凸条部25A,25Bの離間寸法D1を絶縁体15の厚さ寸法D2の5倍以下にすることによって、後端部20Bからボックス部21側へ水分が浸入するのを確実に防止することができる。すなわち、導線圧着部23を水密に保持することができる。したがって、導線16と圧着端子20との接触による電食を確実に防止することができる。   As described above, by making the separation dimension D1 of the protrusions 25A and 25B 5 times or less the thickness dimension D2 of the insulator 15, it is ensured that moisture enters from the rear end portion 20B to the box portion 21 side. Can be prevented. That is, the lead wire crimping part 23 can be kept watertight. Therefore, electrolytic corrosion due to contact between the conductive wire 16 and the crimp terminal 20 can be reliably prevented.
第2の実施形態において、二つの凸条部25A,25Bの径方向の寸法は同程度としている。しかし、これらを互いに異なる寸法にしてもよい。ボックス部21側に位置する凸条部25Aを後端部20B側に位置する凸条部25Bよりも大きくすることによって電線10が挿入しやすくなる。また、凸条部25Bを凸条部25Aよりも大きくすることによって、導線露出部11の屈曲性を維持し、導線圧着部23に対して圧着した状態を保つことができる。   In 2nd Embodiment, the dimension of the radial direction of the two protruding item | line parts 25A and 25B is made comparable. However, they may have different dimensions. The electric wire 10 can be easily inserted by making the ridge portion 25A located on the box portion 21 side larger than the ridge portion 25B located on the rear end portion 20B side. Further, by making the ridge portion 25B larger than the ridge portion 25A, the bendability of the conductor exposed portion 11 can be maintained and the crimped state to the conductor crimp portion 23 can be maintained.
凸条部25A,25Bの断面形状は略矩形にしているが、この形状に限られるものではない。例えば、その断面形状が円形、三角形などの多角形であってもよい。また、凸条部25Aと凸条部25Bとでその断面形状が異なるものであってもよい。   Although the cross-sectional shape of the ridge portions 25A and 25B is substantially rectangular, it is not limited to this shape. For example, the cross-sectional shape may be a polygon such as a circle or a triangle. Moreover, the cross-sectional shape may differ by 25 A of protruding item | line parts, and the protruding item | line part 25B.
<実験例2>
同様にして、凸条部の本数を変えて、加熱前の水密性を評価した。結果を表2に示す。
<Experimental example 2>
Similarly, the watertightness before heating was evaluated by changing the number of ridges. The results are shown in Table 2.
サンプル5は、凸条部を設けないもの、サンプル6は、凸条部を一列周方向に形成したもの、サンプル7は、凸条部を2列周方向に形成したものである。また、サンプル5の圧縮率は、凸条部のない部位での圧縮率であり、サンプル6、7は、凸条部における圧縮率である。なお、サンプル6、7において、凸条部以外の部位の圧縮率は、それぞれ、約60%、約80%である。なお、表中の200kPaは、200kPaでも漏れが確認されなかったことを示す。   Sample 5 has no protrusions, sample 6 has protrusions formed in one circumferential direction, and sample 7 has protrusions formed in two circumferential directions. Moreover, the compression rate of the sample 5 is a compression rate in a site | part without a protruding item | line part, and the samples 6 and 7 are the compression rates in a protruding item | line part. In Samples 6 and 7, the compression ratios of portions other than the ridges are about 60% and about 80%, respectively. In addition, 200 kPa in a table | surface shows that the leak was not confirmed even at 200 kPa.
結果より、凸条部を有さないサンプル5では、n=5の一つにおいて、90kPaで漏れが見られた。すなわち、最低漏れ圧力は90kPaであった。これに対し、サンプル6は、n=5の一つにおいて漏れが確認され、最低漏れ圧力が140kPaであったが、サンプル5よりも良好な結果となった。また、凸条部が2列以上設けられるサンプル7、8では、n=5の全てが200kPaでも漏れが見られなかった。このように、凸条部を設けることで、水密性を高めることができ、2列以上形成した方が、その効果が大きいことが分かった。押込みを複数設けることにより、押込み部、さらに押込みの間で、電線の高い反力で締め付けることができ、止水性能が向上する。   From the results, in sample 5 having no ridges, leakage was observed at 90 kPa in one of n = 5. That is, the minimum leakage pressure was 90 kPa. On the other hand, in Sample 6, leakage was confirmed at one of n = 5, and the minimum leakage pressure was 140 kPa, but the result was better than that of Sample 5. In Samples 7 and 8 in which two or more rows of ridges were provided, no leakage was observed even when all of n = 5 were 200 kPa. Thus, it was found that the watertightness can be improved by providing the ridges, and the effect is greater when two or more rows are formed. By providing a plurality of indentations, it is possible to tighten with a high reaction force of the electric wire between the indentation part and the indentation, and the water stop performance is improved.
<実験例3>
同様にして、凸条部における圧縮率を変えて、加熱前後の水密性を評価した。結果を表3に示す。なお、以下の実験例において、「excellent」は、50kPaでエアリークが見られなかったもの(エアリークする圧力が50kPa以上であるもの)を示し、「good」は、30kPa以上50kPa未満でエアリークしたものを示し、「bad」は、30kPa未満でエアリークが見られたものである。電線サイズは0.75sq、端子被覆圧着部の内径は1.6mmとした。なお、いずれも端子の板厚は0.25mmとした。
<Experimental example 3>
Similarly, the water tightness before and after heating was evaluated by changing the compression ratio in the ridges. The results are shown in Table 3. In the following experimental examples, “excellent” indicates that no air leak was observed at 50 kPa (the pressure at which air leaks is 50 kPa or higher), and “good” indicates that air leaked at 30 kPa or higher and lower than 50 kPa. “Bad” indicates that an air leak was observed at less than 30 kPa. The wire size was 0.75 sq, and the inner diameter of the terminal covering crimping part was 1.6 mm. In all cases, the terminal thickness was 0.25 mm.
結果より、圧縮率が95%〜40%のサンプル9〜18において、加熱なしでは、全て良好な結果であった。特に、サンプル10〜17において、エアリーク圧力が50kPa以上となった。また、サンプル12〜15においては、加熱後におけるエアリーク圧力が50kPa以上となった。   From the results, Samples 9 to 18 having a compression rate of 95% to 40% were all good without heating. In particular, in samples 10 to 17, the air leak pressure was 50 kPa or more. Moreover, in samples 12-15, the air leak pressure after a heating became 50 kPa or more.
<実験例4>
同様にして、凸条部の押込み量を変えて、加熱前後の水密性を評価した。ここで、凸条部の押込み量とは、図16におけるJ寸法を指す。絶縁被覆厚みが0.2mmの場合の結果を表4に示し、絶縁被覆厚みが0.35mmの結果を表5に示した。なお、いずれも端子の板厚は0.25mmとした。
<Experimental example 4>
In the same manner, the watertightness before and after heating was evaluated by changing the pushing amount of the ridges. Here, the pushing amount of the protruding portion indicates the dimension J in FIG. The results when the insulating coating thickness is 0.2 mm are shown in Table 4, and the results when the insulating coating thickness is 0.35 mm are shown in Table 5. In all cases, the terminal thickness was 0.25 mm.
表4より、被覆厚みが0.2mmの場合、押込み量/被覆厚みが75%以下のサンプル19〜22は、良好な結果を得ることができた。押込み量/被覆厚みが、100%でのサンプル23は、押込み量が大きすぎるため、被覆部が切れてしまった。このため、リーク試験を行うことができなかった。また、被覆厚みが0.2mmの場合、押込み量/被覆厚みが、少なくとも13%以上であれば、良好な結果を得ることができた。   From Table 4, when the coating thickness was 0.2 mm, Samples 19 to 22 having an indentation amount / coating thickness of 75% or less were able to obtain good results. Sample 23 with an indentation amount / coating thickness of 100% had a too large indentation amount, so that the covering portion was cut. For this reason, the leak test could not be performed. When the coating thickness was 0.2 mm, good results could be obtained if the indentation amount / the coating thickness was at least 13% or more.
また、表5より、被覆厚みが0.35mmの場合、押込み量/被覆厚みが、71%以下のサンプル24〜29は、の場合に良好な結果を得ることができた。なお、表4と同様に、押込み量/被覆厚みが、100%のサンプル31では、押込み量が大きすぎるため、被覆部が切れてしまった。このため、リーク試験を行うことができなかった。また、被覆厚みが0.35mmの場合、押込み量/被覆厚みが、少なくとも14%以上であれば、良好な結果を得ることができた。このように、本発明では、押込み量/被覆厚みは75%以下であることが望ましい。   Also, from Table 5, when the coating thickness was 0.35 mm, samples 24 to 29 having an indentation amount / coating thickness of 71% or less were able to obtain good results. As in Table 4, in the sample 31 having an indentation amount / covering thickness of 100%, the indentation amount was too large and the covering portion was cut. For this reason, the leak test could not be performed. Moreover, when the coating thickness was 0.35 mm, good results could be obtained if the indentation amount / coating thickness was at least 14%. Thus, in the present invention, the indentation amount / covering thickness is desirably 75% or less.
<実験例5>
同様にして、凸条部の形状を変えて、加熱前後の水密性を評価した。ここで、凸条部の押込み幅とは、図16におけるF寸法を指す。また、先端部の幅とは、寸法Fから、先端(押し込み方向)に向かって縮幅した先端部における幅を指す。結果を表6に示した。なお、端子の板厚は0.25mmで押込み量は板厚以下とした。また、電線サイズは2.5sq、端子被覆圧着部の内径は3.0mm、被覆圧着部の長さは3.0mmとした。
<Experimental example 5>
Similarly, the watertightness before and after heating was evaluated by changing the shape of the ridges. Here, the pushing width of the ridge portion indicates the F dimension in FIG. Moreover, the width | variety of a front-end | tip part refers to the width | variety in the front-end | tip part shrunk | reduced from the dimension F toward the front-end | tip (pressing direction). The results are shown in Table 6. The terminal plate thickness was 0.25 mm, and the push-in amount was less than the plate thickness. The wire size was 2.5 sq, the inner diameter of the terminal covering crimping part was 3.0 mm, and the length of the covering crimping part was 3.0 mm.
表6より、押込み幅が0.2〜0.9のサンプル32〜42において良好な結果を得ることができ、特に、サンプル33〜39はさらに良好な結果を得ることができた。押込み幅と先端の幅はこれに限定されることはない。つまり、先端の幅は押込み幅より小さければよい。例えば押込み幅0.7mmの場合、先端の幅は0.6mm〜0.2mmの間で組み合わせることも勿論可能である。   From Table 6, good results could be obtained for samples 32-42 having an indentation width of 0.2-0.9, and particularly good results were obtained for samples 33-39. The pushing width and the tip width are not limited to this. That is, the width of the tip only needs to be smaller than the pushing width. For example, when the indentation width is 0.7 mm, it is of course possible to combine the width of the tip between 0.6 mm and 0.2 mm.
<実験例6>
同様にして、被覆圧着部の圧縮率及び長さを変えて、加熱前後の水密性を評価した。ここで、長さとは、図14におけるB寸法を指す。なお、端子の板厚は0.25mmとした。また、電線サイズ0.75Sq。端子被覆圧着部の内径1.6mm。結果を表7に示した。
<Experimental example 6>
Similarly, the water tightness before and after heating was evaluated by changing the compression rate and length of the coated crimped part. Here, the length refers to the dimension B in FIG. The terminal plate thickness was 0.25 mm. The wire size is 0.75Sq. The inner diameter of the terminal cover crimping part is 1.6 mm. The results are shown in Table 7.
表7より、被覆圧着部長さが1.9mmのサンプル43、46、49、52、55は、被覆圧着部長さが十分ではなく、水密性が十分ではなかった。被覆圧着部長さが2.0mm以上のサンプル44、45、47、48、50、51、53、54、56、57であれば、十分な水密性を得ることができ、特に、サンプル45、47、48、50、51、53、54、57は、さらに良好な結果を得ることができた。   From Table 7, the samples 43, 46, 49, 52, and 55 with the coated crimped portion length of 1.9 mm were not sufficient in the coated crimped portion length, and the watertightness was not sufficient. Samples 44, 45, 47, 48, 50, 51, 53, 54, 56, and 57 having a coated crimping portion length of 2.0 mm or more can provide sufficient water-tightness. 48, 50, 51, 53, 54, and 57 were able to obtain even better results.
<実験例7>
同様にして、凸条部のピッチを変えて、加熱前後の水密性を評価した。ここで、長さとは、図16におけるG寸法を指す。なお、端子の板厚は0.25mmとした。また、電線サイズは2.5Sq、端子被覆圧着部の内径は3.0mm、被覆圧着部の長さは3.0mm、押込み幅は0.7mmとした。結果を表8に示した。
<Experimental example 7>
Similarly, the watertightness before and after heating was evaluated by changing the pitch of the ridges. Here, the length refers to the G dimension in FIG. The terminal plate thickness was 0.25 mm. The wire size was 2.5 Sq, the inner diameter of the terminal covering crimping part was 3.0 mm, the length of the covering crimping part was 3.0 mm, and the indentation width was 0.7 mm. The results are shown in Table 8.
表8より、凸条部ピッチが0.5〜2.0mmのサンプル59〜70は、十分な水密性を得ることができ、特に、凸条部ピッチが1.0〜1.5mmのサンプル62〜65は、さらに良好な結果を得ることができた。   From Table 8, samples 59 to 70 having a ridge pitch of 0.5 to 2.0 mm can obtain sufficient water-tightness, and in particular, sample 62 having a ridge pitch of 1.0 to 1.5 mm. ~ 65 was able to obtain even better results.
なお、上記実験に用いた、被覆圧着部の内径は代表的なものである。例えば、導体断面積が約1.22mm〜2.65mmのときは内径を約2.2mm〜3.0mm、導体断面積が約0.72mm〜1.37mmのときは内径を約1.5mm〜2.0mm程度にしてよい。 The inner diameter of the coated crimping part used in the above experiment is representative. For example, when the conductor sectional area is about 1.22 mm 2 to 2.65 mm 2 , the inner diameter is about 2.2 mm to 3.0 mm, and when the conductor sectional area is about 0.72 mm 2 to 1.37 mm 2 , the inner diameter is about It may be about 1.5 mm to 2.0 mm.
以上、添付図を参照しながら、本発明の実施の形態を説明したが、本発明の技術的範囲は、前述した実施の形態に左右されない。当業者であれば、特許請求の範囲に記載された技術的思想の範疇内において各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs.
例えば、上述の説明では、圧着端子20の圧着部22を、アルミニウムやアルミニウム合金等の卑な金属からなる電線10に圧着接続する例を説明したが、本発明にはこれに限られない。卑な金属以外に、例えば、銅や銅合金等の貴な金属からなる電線導体と圧着部5とを圧着接続してもよい。この場合でも前記実施形態と略同等の作用及び効果を奏することができる。より詳細には、上述の構成の圧着部22は、圧着状態において、水の浸入を防止できるため、例えば、これまで線間止水のためにシールなどが必要であった銅や銅合金等の芯線で構成する電線導体を接続してもよい。   For example, in the above description, the example in which the crimp portion 22 of the crimp terminal 20 is crimped and connected to the electric wire 10 made of a base metal such as aluminum or aluminum alloy has been described, but the present invention is not limited thereto. In addition to the base metal, for example, a wire conductor made of a noble metal such as copper or a copper alloy and the crimping portion 5 may be crimped and connected. Even in this case, substantially the same operations and effects as the above embodiment can be achieved. In more detail, since the crimping | compression-bonding part 22 of the above-mentioned structure can prevent permeation of water in a crimping | compression-bonding state, for example, copper, a copper alloy, etc. which were required to seal for line water stop until now You may connect the electric wire conductor comprised with a core wire.
また、圧着前の圧着端子20の圧着部22は、導線圧着部23と被覆圧着部24の内径を同一としたが(図1)、本発明はこれに限られない。例えば、図18に示すように、圧着部22の、導線圧着部23と被覆圧着部24の内径(外径)を変えて、段差を形成してもよい。このようにすることで、導線圧着部の肉あまりを少なくすることができ、圧着した端子が導線中心方向へ内倒れすることを防止できる。このため、止水性と導通性の両者を向上させることができる。   Moreover, although the crimping | compression-bonding part 22 of the crimp terminal 20 before crimping made the internal diameter of the conducting wire crimping part 23 and the covering crimping part 24 the same (FIG. 1), this invention is not limited to this. For example, as shown in FIG. 18, a step may be formed by changing the inner diameters (outer diameters) of the conductor crimping part 23 and the covering crimping part 24 of the crimping part 22. By doing in this way, the thickness of the lead wire crimping portion can be reduced, and the crimped terminal can be prevented from falling inward toward the lead wire center. For this reason, both water stop and electrical conductivity can be improved.
また、本発明にかかるワイヤハーネスを複数本束ねて使用することもできる。本発明では、このように複数本のワイヤハーネスが束ねられた構造体を、ワイヤハーネス構造体と称する。   Further, a plurality of wire harnesses according to the present invention can be bundled and used. In the present invention, a structure in which a plurality of wire harnesses are bundled in this way is referred to as a wire harness structure.
1…ワイヤハーネス
10…電線
11…導線露出部
12…絶縁被覆部
13…高圧着部
14…窪み
15…絶縁体
16…導線
17…理想外面
20…圧着端子
20A…前端部
20B…後端部
21…ボックス部
21A…弾性接触片
22…圧着部
23…導線圧着部
24…被覆圧着部
25…凸条部
25A…凸条部
25B…凸条部
26…封止部
29…接合部
30、30a…圧着工具
31…上刃型
32…下刃型
33…小径部
34…大径部
35…隙間
36…段部
37…凸部
41…水槽
42…レギュレータ
X…長手方向
Y…幅方向
DESCRIPTION OF SYMBOLS 1 ... Wire harness 10 ... Electric wire 11 ... Conductor exposed part 12 ... Insulation coating | cover part 13 ... High pressure bonding part 14 ... Indentation 15 ... Insulator 16 ... Conductor 17 ... Ideal outer surface 20 ... Crimp terminal 20A ... Front end part 20B ... Rear end part 21 ... Box part 21A ... Elastic contact piece 22 ... Crimp part 23 ... Conductor crimp part 24 ... Cover crimp part 25 ... Convex line part 25A ... Convex line part 25B ... Convex line part 26 ... Sealing part 29 ... Joining part 30, 30a ... Crimping tool 31 ... Upper blade mold 32 ... Lower blade mold 33 ... Small diameter part 34 ... Large diameter part 35 ... Gap 36 ... Step part 37 ... Convex part 41 ... Water tank 42 ... Regulator X ... Longitudinal direction Y ... Width direction

Claims (9)

  1. 被覆導線と端子とが接続されるワイヤハーネスであって、
    前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、
    前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、
    前記被覆圧着部の長手方向の長さは、2mm以上であり、
    前記被覆圧着部の内面に突出する周方向に環状の凸条部が形成され
    前記凸条部は、高さが前記端子の板厚以下であり、前記被覆圧着部の長手方向に離間して複数個設けられ、
    隣接する前記凸条部間の離間距離の少なくとも一つが前記被覆部の厚さの5倍以下であり、
    前記凸条部における前記被覆圧着部の圧縮率が45%〜90%であり、
    前記凸条部に対応する前記被覆圧着部の外面の凹部の深さは、圧着前の前記被覆導線の絶縁体の厚みに対し、少なくとも一部が14%〜75%であり、
    前記凸条部に対応する前記被覆圧着部の外面の凹部の長手方向の長さは、0.20mm〜0.90mmであることを特徴とするワイヤハーネス。
    A wire harness in which a coated conductor and a terminal are connected,
    The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
    The crimping part has a coated crimping part that crimps the covering part and a conductive wire crimping part that crimps the conductive wire exposed from the covering part, and other parts are sealed except the part where the coated conductive wire is inserted. Has been
    The length in the longitudinal direction of the coated crimping part is 2 mm or more,
    An annular ridge is formed in the circumferential direction protruding on the inner surface of the coated crimping portion ,
    The protrusions have a height that is equal to or less than the plate thickness of the terminal, and are provided in a plurality spaced apart in the longitudinal direction of the coated crimping part,
    At least one of the separation distances between the adjacent ridges is not more than 5 times the thickness of the covering,
    The compression rate of the covering crimping portion in the ridge is 45% to 90%,
    The depth of the concave portion on the outer surface of the coated crimping portion corresponding to the protruding strip portion is at least partially 14% to 75% with respect to the thickness of the insulator of the coated conductor before crimping,
    The longitudinal length of the recess in the outer surface of the insulation crimp portion, the wire harness, wherein 0.20mm~0.90mm der Rukoto corresponding to the convex portions.
  2. 前記凸条部に対応する前記被覆圧着部の外面の凹部の後端から前記被覆圧着部の端部までの直線部の距離が0.5mm以上であることを特徴とする請求項1記載のワイヤハーネス。   2. The wire according to claim 1, wherein a distance of a straight portion from a rear end of a concave portion on an outer surface of the coated crimping portion corresponding to the protruding strip portion to an end portion of the coated crimped portion is 0.5 mm or more. Harness.
  3. 前記被覆圧着部の内面には、圧着時における金型の合わせ部に窪みが形成され、
    前記凸条部の径方向の寸法は、前記窪みの寸法以上であることを特徴とする請求項1記載のワイヤハーネス。
    On the inner surface of the coated crimping portion, a depression is formed in the mating portion of the mold during crimping,
    The wire harness according to claim 1, wherein a dimension in a radial direction of the ridge is equal to or greater than a dimension of the recess.
  4. 複数の前記凸条部の長手方向のピッチは、前記端子の板厚の1.5倍以上であることを特徴とする請求項記載のワイヤハーネス。 Longitudinal pitch of the plurality of the convex portions, according to claim 1, wherein the wire harness, wherein said at terminals of plate thickness 1.5 times or more.
  5. 前記凸条部に対応する前記被覆圧着部の外面の凹部の長手方向の長さ×前記凸条部の個数が、前記被覆圧着部の長手方向の長さの1/2以下であることを特徴とする請求項記載のワイヤハーネス。 The length in the longitudinal direction of the concave portion on the outer surface of the coated crimping portion corresponding to the convex strip portion × the number of the convex strip portions is ½ or less of the length in the longitudinal direction of the coated crimped portion. The wire harness according to claim 1 .
  6. 複数の前記凸条部の長手方向のピッチは、0.5mm〜2.0mmであることを特徴とする請求項から請求項のいずれかに記載のワイヤハーネス。 Longitudinal pitch of the plurality of the convex portions, the wire harness according to any one of claims 1 to 5, characterized in that a 0.5 mm to 2.0 mm.
  7. 前記導線はアルミニウム系材料で構成され、前記導線圧着部が銅系材料で構成されることを特徴とする請求項1記載のワイヤハーネス。   The wire harness according to claim 1, wherein the conductive wire is made of an aluminum-based material, and the conductive wire crimping portion is made of a copper-based material.
  8. 端子と被覆導線との接続する方法であって、
    前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、
    前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、
    前記被覆圧着部の長手方向の長さは、2mm以上であり、
    前記圧着部に前記被覆導線を挿入し、金型で前記圧着部を圧着する際に
    前記被覆圧着部の内面に突出するように、高さが前記端子の板厚以下であり、周方向に環状の凸条部を、前記被覆圧着部の長手方向に離間して複数個形成し、
    隣接する前記凸条部間の離間距離の少なくとも一つを前記被覆部の厚さの5倍以下とし、
    前記凸条部に対応する前記被覆圧着部の外面の凹部の深さは、圧着前の前記被覆導線の絶縁体の厚みに対し、少なくとも一部を14%〜75%とし、
    前記凸条部に対応する前記被覆圧着部の外面の凹部の長手方向の長さを、0.20mm〜0.90mmとし、
    前記凸条部における前記被覆圧着部の圧縮率が45%〜90%となるように、前記被覆圧着部で前記被覆導線を圧着することを特徴とする端子と被覆導線の接続方法。
    A method of connecting a terminal and a coated conductor,
    The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
    The crimping part has a coated crimping part that crimps the covering part and a conductive wire crimping part that crimps the conductive wire exposed from the covering part, and other parts are sealed except the part where the coated conductive wire is inserted. Has been
    The length in the longitudinal direction of the coated crimping part is 2 mm or more,
    When the coated conductor is inserted into the crimping part and the crimping part is crimped with a mold , the height is equal to or less than the plate thickness of the terminal so as to protrude from the inner surface of the coated crimping part, and annular in the circumferential direction. Forming a plurality of protruding strips spaced apart in the longitudinal direction of the coated crimping part ,
    At least one of the separation distances between the adjacent ridges is not more than 5 times the thickness of the covering part,
    The depth of the concave portion of the outer surface of the coated crimping portion corresponding to the protruding strip portion is at least partly 14% to 75% with respect to the thickness of the insulator of the coated conductor before crimping,
    The length in the longitudinal direction of the concave portion of the outer surface of the coated crimping portion corresponding to the convex strip portion is 0.20 mm to 0.90 mm,
    A method of connecting a terminal and a coated conductor, wherein the coated conductor is crimped by the coated crimp portion so that a compression ratio of the coated crimp portion in the convex portion is 45% to 90%.
  9. 複数本のワイヤハーネスが束ねられたワイヤハーネス構造体であって、
    前記ワイヤハーネスは、被覆導線と端子とが接続されており、
    前記端子は、前記被覆導線が圧着される圧着部と、端子本体とを有し、
    前記圧着部は、被覆部を圧着する被覆圧着部と、前記被覆部から露出する導線を圧着する導線圧着部とを有し、前記被覆導線が挿入される部位を除き、他の部位が封止されており、
    前記被覆圧着部の長手方向の長さは、2mm以上であり、
    前記被覆圧着部の内面に突出する周方向に環状の凸条部が形成され
    前記凸条部は、高さが前記端子の板厚以下であり、前記被覆圧着部の長手方向に離間して複数個設けられ、
    隣接する前記凸条部間の離間距離の少なくとも一つが前記被覆部の厚さの5倍以下であり、
    前記凸条部における前記被覆圧着部の圧縮率が45%〜90%であり、
    前記凸条部に対応する前記被覆圧着部の外面の凹部の深さは、圧着前の前記被覆導線の絶縁体の厚みに対し、少なくとも一部が14%〜75%であり、
    前記凸条部に対応する前記被覆圧着部の外面の凹部の長手方向の長さは、0.20mm〜0.90mmであることを特徴とするワイヤハーネス構造体。
    A wire harness structure in which a plurality of wire harnesses are bundled,
    The wire harness is connected to a coated conductor and a terminal,
    The terminal has a crimping portion to which the coated conductor is crimped, and a terminal body,
    The crimping part has a coated crimping part that crimps the covering part and a conductive wire crimping part that crimps the conductive wire exposed from the covering part, and other parts are sealed except the part where the coated conductive wire is inserted. Has been
    The length in the longitudinal direction of the coated crimping part is 2 mm or more,
    An annular ridge is formed in the circumferential direction protruding on the inner surface of the coated crimping portion ,
    The protrusions have a height that is equal to or less than the plate thickness of the terminal, and are provided in a plurality spaced apart in the longitudinal direction of the coated crimping part,
    At least one of the separation distances between the adjacent ridges is not more than 5 times the thickness of the covering,
    The compression rate of the covering crimping portion in the ridge is 45% to 90%,
    The depth of the concave portion on the outer surface of the coated crimping portion corresponding to the protruding strip portion is at least partially 14% to 75% with respect to the thickness of the insulator of the coated conductor before crimping,
    Longitudinal length, the wire harness structure characterized 0.20mm~0.90mm der Rukoto recess of the outer surface of the insulation crimp portion corresponding to the convex portions.
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