JP7504336B1 - Conductor crimping structure with connection terminal - Google Patents

Conductor crimping structure with connection terminal Download PDF

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JP7504336B1
JP7504336B1 JP2023199184A JP2023199184A JP7504336B1 JP 7504336 B1 JP7504336 B1 JP 7504336B1 JP 2023199184 A JP2023199184 A JP 2023199184A JP 2023199184 A JP2023199184 A JP 2023199184A JP 7504336 B1 JP7504336 B1 JP 7504336B1
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conductor
crimping
layer plate
inner layer
connection terminal
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健一 三田村
次雄 安保
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Union Machinery Co Ltd
Delta Plus Co Ltd
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Delta Plus Co Ltd
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Abstract

【課題】 電線の導体を導体圧着部により強固に圧着固定し、電気的接続の信頼性を確保する。【解決手段】 導体圧着部３には、予め内層板３ｂと外層板３ａとの二層構造による第１、第２圧着片３ｅ、３ｆがＵ字状に立ち上げられている。また、各圧着片３ｅ、３ｆの折り返し部の外層板３ａと内層板３ｂとの間に空隙部３ｃ、３ｄが形成されている。圧着片３ｅ、３ｆ間に単体から成る導体６を配置し、導体圧着装置のプレス上型Ｐｕ、プレス下型Ｐｄにより、外層板３ａと内層板３ｂ、特に第１、第２圧着片３ｅ、３ｆを押し潰すことにより、導体６を周囲から加締めて固定する。この加締めにおいて、下方から導体６の中心に向う押圧力、及び斜め上方から導体６の中心に向う２方向の押圧力を加えて、導体６に接するこれらの押圧部３ｋ、３ｌ、３ｍ同士の間の内層板３ｂと導体６の間に非押圧部３ｎ、３ｏ、３ｐを設ける。【選択図】図１０[Problem] To firmly crimp and fix a conductor of an electric wire by a conductor crimping part, and to ensure the reliability of an electrical connection. [Solution] In the conductor crimping part 3, first and second crimping pieces 3e, 3f having a two-layer structure of an inner layer plate 3b and an outer layer plate 3a are raised in a U-shape in advance. Also, gaps 3c, 3d are formed between the outer layer plate 3a and the inner layer plate 3b at the folded-back portions of each crimping piece 3e, 3f. A conductor 6 made of a single unit is placed between the crimping pieces 3e, 3f, and the outer layer plate 3a and the inner layer plate 3b, particularly the first and second crimping pieces 3e, 3f, are crushed by an upper press die Pu and a lower press die Pd of a conductor crimping device, thereby crimping and fixing the conductor 6 from the periphery. In this crimping, a pressing force is applied from below toward the center of the conductor 6, and a pressing force is applied from diagonally above toward the center of the conductor 6, to provide non-pressed portions 3n, 3o, and 3p between the inner layer plate 3b and the conductor 6 between the pressed portions 3k, 3l, and 3m that contact the conductor 6. [Selected Figure]

Description

本発明は、例えばコネクタハウジングに内装し、相手側コネクタの接続端子と嵌合する小型の接続端子による導体圧着構造に関するものである。 The present invention relates to a conductor crimping structure using small connection terminals that are fitted inside a connector housing and engage with the connection terminals of a mating connector.

電気関係部品の小型化、軽量化、集積化に伴い、回路の接続に使用される接続端子には、より小型のものが常に要求されている。このことから、細線化された電線の導体に対応して、特許文献１に係る圧着接続端子が開示されている。 As electrical components become smaller, lighter, and more integrated, there is a constant demand for smaller connection terminals used to connect circuits. For this reason, the crimp connection terminal in Patent Document 1 is disclosed to accommodate thinner electric wire conductors.

この特許文献１に係る圧着接続端子は、圧着片を二層構造とし、この二層構造の圧着片間に空隙部を形成し、細径の導体に対して加締め力を過大に加えて過度の変形等を与えることなく、この空隙部を維持する適度の弾発性を有する加締め力による加締めて固定することにより、撚線から成る細径の導体を確実に圧着接続することを可能としている。 The crimp connection terminal according to Patent Document 1 has a two-layered crimp piece, a gap is formed between the two-layered crimp pieces, and the crimping force has a moderate elasticity to maintain the gap without excessively applying a crimping force to the thin conductor, causing excessive deformation, etc., making it possible to reliably crimp and connect thin conductors made of twisted wires.

従来においては、使用する導体は複数本の芯線を撚り合わせている場合が殆どであって、導体自体に或る程度の柔軟性、可塑性がある。従って、特許文献１の空隙部を設けた圧着接続端子を用いて、適度の弾発性を有する加締め力により導体を圧着すれば、導体が細線であっても不自然に変形することがなく、また導電性等の電気的特性や引き抜き等の機械的特性を悪化させることはない。 Conventionally, the conductors used are almost always made of multiple twisted core wires, and the conductors themselves have a certain degree of flexibility and plasticity. Therefore, if the conductor is crimped with a crimping force that has an appropriate degree of elasticity using the crimp connection terminal with a gap as described in Patent Document 1, the conductor will not unnaturally deform even if it is a thin wire, and there will be no deterioration in electrical properties such as conductivity or mechanical properties such as pull-out.

特開２０２０－７１９２０号公報JP 2020-71920 A

しかし、近年においては、主に経済性の観点から、接続端子に接続する信号電線には、導体として単体の銅合金等の金属線の使用が試みられ、その直径も０．２５～０．６ｍｍ程度の超細線とされている。 However, in recent years, mainly from the perspective of economy, attempts have been made to use metal wires such as simple copper alloys as conductors for the signal wires that connect to the connection terminals, with the diameter being made into ultra-fine wires of around 0.25 to 0.6 mm.

このような単体から成る細線導体を従来の端子圧着片により接続する場合は、一般的には断面が図１２に示すような圧着構造になる。しかし、芯線を撚り合わせた導体とは異なり、単体の導体ａは柔軟性、可塑性に乏しく剛体に近く、特に細線の導体ａにあっては、圧着片ｂにより固定しても、圧着片ｂが導体ａの周囲を均等な加締め力で加締めているとは限らず、必ずしも十分な機械固定力、電気導電性が得られない。 When such a thin conductor consisting of a single unit is connected using a conventional terminal crimping piece, the cross section generally has a crimp structure as shown in Figure 12. However, unlike a conductor with twisted core wires, a single conductor a has little flexibility or plasticity and is close to a rigid body. In particular, when a thin conductor a is fixed with crimping piece b, the crimping piece b does not necessarily crimp the periphery of the conductor a with an even crimping force, and sufficient mechanical fixing force and electrical conductivity are not necessarily obtained.

しかも、単体から成る細径の導体を使用した場合には、特許文献１のような空隙部を有する圧着接続端子を用いても、なお導体を良好に圧着できないことが多く、機械的、電気的な問題が生じ易い。一方、通常の導体に対しては、導体の表面に発生し電気的障害となる酸化物や硫化物は圧着時に破壊されて除去し易いが、単体から成る細径の導体ではこの酸化物や硫化物の除去が極めて難しいという問題がある。 Moreover, when using a thin conductor made of a single piece, even if a crimp connection terminal with a gap as in Patent Document 1 is used, the conductor still often cannot be crimped well, and mechanical and electrical problems are likely to occur. On the other hand, for normal conductors, oxides and sulfides that occur on the surface of the conductor and cause electrical interference are easily destroyed and removed during crimping, but with thin conductors made of a single piece, the problem is that it is extremely difficult to remove these oxides and sulfides.

本発明の目的は、上述の課題を解決し、単線から成る導体であっても、導体を確実に加締めて良好な固定力と導電性とを実現できる接続端子による導体圧着構造を提供することにある。 The object of the present invention is to solve the above problems and provide a conductor crimping structure using a connection terminal that can reliably crimp the conductor and achieve good fixing force and conductivity, even if the conductor is made of a single wire.

上記目的を達成するための本発明に係る接続端子による導体圧着構造は、導電金属板を打抜き、折曲して導体圧着部を形成し、該導体圧着部の底部からＵ字状に立ち上げた一対の圧着片を有する圧着接続端子を用いて、前記圧着片により単体の金属線から成る断面円形の導体を加締めて固定した接続端子による導体圧着構造であって、前記各圧着片は、外層板と、該外層板の上端部の折り返し部から内側に折り返して前記外層板に積層した内層板とから成る二層構造であり、前記外層板と前記内層板との間の前記折り返し部の内側には、それぞれ空隙部を設け、前記内層板と前記導体の間には、前記底部及び一対の前記空隙部が存在する上方左右から前記導体の中心に向けた３方向から集中して掛かる押圧力によって前記内層板に対して変形を与えて形成される３個所の押圧部と、これらの押圧部の形成に伴い前記押圧部同士の間に形成される３個所の非押圧部とを備え、前記３個所の押圧部による前記３方向からの付勢力を伴う接触によって前記導体を加締めて圧着固定した際に、前記３個所の非押圧部には空隙が生じていることを特徴とする。 In order to achieve the above object, the present invention provides a conductor crimping structure using a connection terminal, in which a conductor crimping portion is formed by punching and bending a conductive metal plate, and a crimp connection terminal having a pair of crimping pieces standing up in a U-shape from the bottom of the conductor crimping portion is used, and a conductor having a circular cross section made of a single metal wire is crimped and fixed by the crimping pieces, wherein each of the crimping pieces has a two-layer structure consisting of an outer layer plate and an inner layer plate which is folded back from a folded back portion at the upper end of the outer layer plate to the inside and laminated on the outer layer plate, and the folded back portion between the outer layer plate and the inner layer plate is a two-layer structure consisting of an outer layer plate and an inner layer plate which is folded back from a folded back portion at the upper end of the outer layer plate to the inside and laminated on the outer layer plate, and a gap is provided on the inside of each of the inner layer boards, and between the inner layer board and the conductor there are three pressed portions formed by deforming the inner layer board by concentrated pressing forces applied from three directions toward the center of the conductor from the upper left and right sides where the bottom and the pair of gaps are located , and three non-pressed portions formed between the pressed portions as a result of the formation of these pressed portions , and when the conductor is crimped and crimped to be fixed by contact with the three pressed portions accompanied by biasing forces from the three directions, gaps are generated in the three non-pressed portions .

本発明に係る接続端子による導体圧着構造によれば、二層構造の圧着片に設けた空隙部を用いて導体を加締めると共に、導体に対し局部的に強い押圧力を集中する押圧部を３個所に設けると共に、これらの押圧部に隣接する３個所の圧着片と導体との間に、空隙である非押圧部を設けることにより、導体に対する確実な加締めによる固定が可能で、機械的、電気的な信頼性を確保し得る。 The conductor crimping structure of the connection terminal according to the present invention uses gaps in the two-layered crimping pieces to crimp the conductor, and three pressure sections are provided to locally concentrate a strong pressure force on the conductor. In addition, gaps that are non-pressing sections are provided between the conductor and the three crimping pieces adjacent to these pressing sections, allowing the conductor to be securely crimped and fixed, ensuring mechanical and electrical reliability.

使用する圧着接続端子の斜視図である。FIG. 2 is a perspective view of a crimp connection terminal to be used. 打抜いた導電金属板の平面図である。FIG. 2 is a plan view of a stamped conductive metal plate. 折曲工程の一工程での導体圧着部の斜視図である。FIG. 11 is a perspective view of the conductor crimping portion in one step of a bending process. 圧着前部の圧着片をＵ字状に立ち上げた状態の横断面図である。FIG. 11 is a cross-sectional view of the crimping piece at the front crimping portion raised into a U-shape. 圧着後部の圧着片をＵ字状に立ち上げた状態の横断面図である。FIG. 11 is a cross-sectional view of the crimping piece at the rear of the crimping portion, in a state where the crimping piece is raised into a U-shape. 圧着前部の第１、第２圧着片内に導体を配置した状態の説明図である。13 is an explanatory diagram of a state in which a conductor is disposed within the first and second crimping pieces of the front crimping portion. FIG. 圧着前部の圧着工程１における断面構造図である。FIG. 2 is a cross-sectional structural view of the front crimping portion in crimping step 1. 圧着前部の圧着工程２における断面構造図である。FIG. 13 is a cross-sectional structural view of the front crimping portion in crimping step 2. 圧着前部の圧着工程３における断面構造図である。FIG. 13 is a cross-sectional structural view of the front crimping portion in crimping step 3. 圧着前部の圧着工程４における断面構造図である。FIG. 13 is a cross-sectional structural view of the front crimping portion in crimping step 4. 導体を圧着固定した状態の圧着接続端子の斜視図である。3 is a perspective view of the crimp connection terminal with the conductor crimped and fixed thereto; FIG. 従来の圧着固定構造の断面図である。FIG. 1 is a cross-sectional view of a conventional crimping and fixing structure.

本発明を図１～図１１に図示の実施例に基づいて詳細に説明する。
図１は本発明に係る接続端子による導体圧着構造で使用する実施例の圧着接続端子１の斜視図である。この圧着接続端子１は例えば厚さ０．１ｍｍの薄肉の黄銅製であり、予め両表面に銅メッキ、スズメッキ等を施した１枚の導電金属板を打抜き、接続部、圧着部等が折曲により形成されている。 The present invention will be described in detail with reference to the embodiment shown in FIG. 1 to FIG.
1 is a perspective view of a crimp connection terminal 1 according to an embodiment of the present invention, which is used in a conductor crimping structure using a connection terminal according to the present invention. The crimp connection terminal 1 is made of thin brass, for example 0.1 mm thick, and is punched out from a single conductive metal plate with both surfaces previously plated with copper or tin, and the connection portion, crimping portion, etc. are formed by bending.

圧着接続端子１の前方側には、相手側コネクタの接続端子と接続する例えば雄型挿入部である接続部２が形成され、後方側に導体圧着部３、被覆圧着部４が順次に配列されている。また、導体圧着部３は、長手方向に沿って前方から圧着前部３Ｘと圧着後部３Ｙとに区分されている。実際の圧着接続端子１には、コネクタハウジング内での姿勢を安定させるためのスタビライザや、コネクタハウジングに対する前後方向への抜け出しを防止するための係止部等が付設されることもあるが、これらの公知の機構の図示は省略している。 The front side of the crimp connection terminal 1 is formed with a connection section 2, e.g. a male insertion section, which connects with the connection terminal of the mating connector, and the conductor crimping section 3 and the insulation crimping section 4 are arranged in sequence on the rear side. The conductor crimping section 3 is divided into a crimp front section 3X and a crimp rear section 3Y from the front along the longitudinal direction. An actual crimp connection terminal 1 may be provided with a stabilizer for stabilizing its position within the connector housing, a locking section for preventing it from slipping out of the connector housing in the forward and backward directions, and the like, but these well-known mechanisms are not shown in the figures.

図２は圧着接続端子１に成型する前の導電金属板５の打抜いた状態の平面図であり、接続部２、導体圧着部３、被覆圧着部４が素材として平面状に区画化されている。被覆圧着部４の更に後方には、打抜いた状態の圧着接続端子同士１を連結するための送り片５ａが設けられており、各圧着接続端子１の後端の被覆圧着部４が連結片５ｂを介して送り片５ａに接続されている。なお、送り片５ａにはパイロット孔５ｃが設けられ、圧着接続端子１のその後の成型工程において、導電金属板５を間欠的に搬送するために使用される。 Figure 2 is a plan view of the conductive metal plate 5 in a punched state before being formed into the crimp connection terminal 1, with the connection portion 2, conductor crimping portion 3, and coating crimping portion 4 being partitioned into a planar shape as a material. Further behind the coating crimping portion 4, a feed piece 5a is provided for connecting the crimp connection terminals 1 in the punched state, and the coating crimping portion 4 at the rear end of each crimp connection terminal 1 is connected to the feed piece 5a via a connecting piece 5b. The feed piece 5a is provided with a pilot hole 5c, which is used to intermittently transport the conductive metal plate 5 in the subsequent molding process of the crimp connection terminal 1.

このように打抜かれた導電金属板５は、例えば必要に応じて面取りや表面処理が行われた後に、送り片５ａにより搬送されながら、フォーミングプレスによる各成型工程において、接続部２、導体圧着部３、被覆圧着部４が順次に折曲され、図１に示す圧着接続端子１に成型される。そして、成型後に連結片５ｂは切断され、各圧着接続端子１は個々に分離される。 The conductive metal plate 5 punched out in this manner is then subjected to chamfering or surface treatment as necessary, and then conveyed by the feed piece 5a. In each forming process by the forming press, the connection portion 2, the conductor crimping portion 3, and the coating crimping portion 4 are successively bent, and formed into the crimp connection terminal 1 shown in FIG. 1. After forming, the connecting piece 5b is cut off, and each crimp connection terminal 1 is individually separated.

接続部２においては、図１、図２に示すように、導電金属板５の下板とする底板２ａの両側から上板となる折返片２ｂ、２ｃが、点線に沿って上側に折り返され、更に折返片２ｂ、２ｃの両縁同士が突き合わされた二層構造の雄型挿込端とされている。なお、接続部２は他の雄型形状や、或いは雌型の受用接続部とする場合もある。 As shown in Figures 1 and 2, in the connection part 2, the folded pieces 2b and 2c that form the upper plate are folded upward along the dotted lines from both sides of the bottom plate 2a that forms the lower plate of the conductive metal plate 5, and the edges of the folded pieces 2b and 2c are butted together to form a two-layered male insertion end. Note that the connection part 2 may have another male shape or may be a female receptacle connection part.

図２に示す導電金属板５では、圧着前部３Ｘ、圧着前部３Ｘはそれぞれ、中央に配置された外層板３ａと、この外層板３ａの両側から幅方向に延在され、幅方向の長さが異なる２枚の内層板３ｂとから構成されている。導体圧着部３の２本の長手方向の点線は、後述する折曲工程で外層板３ａから内層板３ｂを内側に折り返す位置を示している。 In the conductive metal plate 5 shown in FIG. 2, the crimping front portion 3X and the crimping front portion 3X are each composed of an outer layer plate 3a located in the center and two inner layer plates 3b that extend widthwise from both sides of the outer layer plate 3a and have different width lengths. The two dotted lines in the longitudinal direction of the conductor crimping portion 3 indicate the positions where the inner layer plate 3b is folded inward from the outer layer plate 3a in the folding process described below.

図３は折曲工程の１工程における導体圧着部３の斜視図である。圧着前部３Ｘ、圧着後部３Ｙでは、内層板３ｂが外層板３ａの上端部からそれぞれ折り返し部において内側に折り返されて積層した二層構造とされている。そして、圧着前部３Ｘの片側の内層板３ｂの幅が長く延在され、圧着後部３Ｙでは他側の内層板３ｂの幅が長くされている。更に、圧着前部３Ｘ、圧着後部３Ｙの折り返し部の内層板３ｂと外層板３ａの間には、断面が例えば水滴形状、風船形状、円形状、楕円形状等の空隙部３ｃ、３ｄがそれぞれ形成されている。なお、圧着前部３Ｘの空隙部３ｃと圧着後部３Ｙの空隙部３ｄとは連通し、圧着前部３Ｘの空隙部３ｄと圧着後部３Ｙの空隙部３ｃとは連通している。 Figure 3 is a perspective view of the conductor crimping portion 3 in one step of the bending process. In the front crimping portion 3X and the rear crimping portion 3Y, the inner layer plate 3b is folded inward from the upper end of the outer layer plate 3a at the folded portion to form a two-layer structure. The width of the inner layer plate 3b on one side of the front crimping portion 3X is extended, and the width of the inner layer plate 3b on the other side of the rear crimping portion 3Y is extended. Furthermore, between the inner layer plate 3b and the outer layer plate 3a at the folded portion of the front crimping portion 3X and the rear crimping portion 3Y, gaps 3c and 3d having cross sections, for example, a water drop shape, a balloon shape, a circle shape, an ellipse shape, etc., are formed. The gap 3c of the front crimping portion 3X communicates with the gap 3d of the rear crimping portion 3Y, and the gap 3d of the front crimping portion 3X communicates with the gap 3c of the rear crimping portion 3Y.

次の折曲工程において、圧着前部３Ｘ及び圧着後部３Ｙでは、両側の外層板３ａ、内層板３ｂをそれぞれ図４及び図５に示すように、第１、第２圧着片３ｅ、３ｆとして、斜め上方に向けてＵ字状に立ち上げている。この状態において、圧着前部３Ｘと圧着後部３Ｙとは左右対称とされている。圧着前部３Ｘの第１圧着片３ｅ側の内層板３ｂは外層板３ａの上端部の折り返し部から下方に向けられ端縁部３ｇは外層板３ａによる底部を覆い、更に第２圧着片３ｆの立ち上がり部の略中間位置にまで外層板３ａに沿って長く延在されている。一方、第２圧着片３ｆ側の内層板３ｂは外層板３ａの上端部の折り返し部から下方に向けられ、端縁部３ｈは第２圧着片３ｆの立ち上がり部の略中間位置までと短く延在されている。そして、内層板３ｂの端縁部３ｇ、端縁部３ｈ同士との間には、外層板３ａ上に沿った隙間３ｉが形成されている。 In the next folding process, the outer layer 3a and the inner layer 3b on both sides of the crimped front portion 3X and the crimped rear portion 3Y are raised in a U-shape diagonally upward as the first and second crimped pieces 3e and 3f, as shown in Figures 4 and 5, respectively. In this state, the crimped front portion 3X and the crimped rear portion 3Y are bilaterally symmetrical. The inner layer 3b on the first crimped piece 3e side of the crimped front portion 3X is directed downward from the folded portion of the upper end of the outer layer 3a, and the edge portion 3g covers the bottom portion of the outer layer 3a and further extends long along the outer layer 3a to approximately the middle position of the rising portion of the second crimped piece 3f. On the other hand, the inner layer 3b on the second crimped piece 3f side is directed downward from the folded portion of the upper end of the outer layer 3a, and the edge portion 3h extends short to approximately the middle position of the rising portion of the second crimped piece 3f. A gap 3i is formed between the edge portions 3g and 3h of the inner layer plate 3b along the outer layer plate 3a.

このように、圧着前部３Ｘと圧着後部３Ｙとを左右対称としているのは、導体圧着部３の長さを大きくした場合に、後述する圧着工程において、導体に対する圧着力が左右不均衡となり易く、圧着接続端子１が捩れることを防止し、圧着力を左右均等に加えるためである。 The reason why the front crimping portion 3X and rear crimping portion 3Y are symmetrical in this way is that if the length of the conductor crimping portion 3 is increased, the crimping force on the conductor is likely to become unbalanced between the left and right in the crimping process described below, and this prevents the crimp connection terminal 1 from twisting and applies the crimping force evenly to the left and right.

単体の導体６を圧着接続端子１により圧着接続するに際しては、先ず図６に示すように、絶縁被覆部が剥離された状態の、例えば直径０．３２ｍｍの例えば銅合金である金属線から成る導体６を、圧着接続端子１の長手方向に沿って圧着前部３Ｘの第１、第２圧着片３ｅ、３ｆの間に挿入し、内層板３ｂの底部３ｊ上に載置する。なお、圧着後部３Ｙにおいても、導体６に対する圧着は同時にかつ同様になされるので、以後の圧着工程は圧着前部３Ｘについてのみ説明する。 When crimping a single conductor 6 with a crimp connection terminal 1, first, as shown in FIG. 6, the conductor 6, which is a metal wire, for example, a copper alloy, with its insulating coating stripped off and having a diameter of, for example, 0.32 mm, is inserted between the first and second crimp pieces 3e, 3f of the crimp front part 3X along the longitudinal direction of the crimp connection terminal 1, and placed on the bottom part 3j of the inner layer plate 3b. Note that crimping of the conductor 6 is performed simultaneously and in the same way in the crimp rear part 3Y, so the subsequent crimping process will only be described for the crimp front part 3X.

導体圧着装置による導体６に対する圧着工程では、プレス上型Ｐｕとプレス下型Ｐｄとの間に第１、第２圧着片３ｅ、３ｆを配置した状態で、プレス上型Ｐｕの下降、プレス下型Ｐｄの上昇を相対的に行う。なお、このプレス上型Ｐｕ、プレス下型Ｐｄは、圧着前部３Ｘと圧着後部３Ｙとを区別することなく一体に作動するようにされている。 In the process of crimping the conductor 6 by the conductor crimping device, the upper press die Pu is lowered and the lower press die Pd is raised relative to each other with the first and second crimping pieces 3e, 3f positioned between the upper press die Pu and the lower press die Pd. The upper press die Pu and the lower press die Pd are designed to operate together without distinguishing between the front crimping part 3X and the rear crimping part 3Y.

プレス上型Ｐｕ、プレス下型Ｐｄとの作動により、図７に示すように、第１、第２圧着片３ｅ、３ｆはプレス上型Ｐｕ、プレス下型Ｐｄの形状に従って導体６を包み込むように変形する。この過程で、第１、第２圧着片３ｅ、３ｆへの加締めにより、内層板３ｂの端縁部３ｇ、３ｈ間の隙間３ｉは縮小され、空隙部３ｃ、３ｄも縮小され、外層板３ａの側面はプレス上型Ｐｕにより立ち上げられ、外層板３ａ、内層板３ｂによる底部は、プレス下型Ｐｄに沿ってＵ字形から偏平状に変形する。 By the operation of the press upper die Pu and press lower die Pd, the first and second crimping pieces 3e, 3f are deformed to encase the conductor 6 according to the shapes of the press upper die Pu and press lower die Pd, as shown in Figure 7. During this process, the gap 3i between the edge portions 3g, 3h of the inner layer plate 3b is reduced by the crimping of the first and second crimping pieces 3e, 3f, and the voids 3c, 3d are also reduced, the side of the outer layer plate 3a is raised by the press upper die Pu, and the bottom portion formed by the outer layer plate 3a and inner layer plate 3b is deformed from a U-shape to a flattened shape along the press lower die Pd.

更に、図８に示すようにプレス上型Ｐｕとプレス下型Ｐｄの作動により、強い加締め力が第１、第２圧着片３ｅ、３ｆに加えることにより、第１、第２圧着片３ｅ、３ｆは更に導体６を包み込むように変形する。このとき、導体６には主に矢印で示す３方向からの押圧力、つまり、底部３ｊ方向から導体６の中心に向う導体６への押圧力、左右斜め両方向から導体６の中心に向う押圧力が加えられる。そして、これらの押圧力の３方向の角度は約１２０度間隔とされている。 Furthermore, as shown in FIG. 8, by operating the press upper die Pu and press lower die Pd, a strong crimping force is applied to the first and second crimping pieces 3e, 3f, which deform further to encase the conductor 6. At this time, pressure is applied to the conductor 6 mainly from three directions indicated by arrows, that is, a pressure force toward the center of the conductor 6 from the direction of the bottom 3j, and pressure forces toward the center of the conductor 6 from both the left and right diagonal directions. The angles of these three directions of pressure forces are spaced apart by approximately 120 degrees.

更なる加締めにより、図９に示すように、第１、第２圧着片３ｅ、３ｆでは、加締め過程で外層板３ａ、内層板３ｂの厚みが増加すると共に、空隙部３ｃ、３ｄの大きさは更に縮小される。この加締め過程で、プレス上型Ｐｕ、プレス下型Ｐｄによる押圧力を特に前述の３方向から局部的に集中させ、この押圧力を集中させた３個所において、内層板３ｄが導体６に接する押圧部３ｋ、３ｌ、３ｍを設けると共に、これらの押圧部３ｋ、３ｌ、３ｍ同士の間の導体６に沿った３個所においては、内層板３ｄから導体６に対して押圧力を加えることがなく、この部分における内層板３ｄと導体６の間に空隙となる３個所の非押圧部３ｎ、３ｏ、３ｐを設ける。 As a result of further crimping, as shown in Figure 9, in the first and second crimping pieces 3e, 3f, the thickness of the outer layer plate 3a and the inner layer plate 3b increases during the crimping process, and the size of the gaps 3c, 3d is further reduced. During this crimping process, the pressing force from the press upper die Pu and the press lower die Pd is concentrated locally, particularly from the three directions mentioned above, and at the three locations where this pressing force is concentrated, pressing parts 3k, 3l, 3m are provided where the inner layer plate 3d contacts the conductor 6, and at three locations along the conductor 6 between these pressing parts 3k, 3l, 3m, no pressing force is applied from the inner layer plate 3d to the conductor 6 from the inner layer plate 3d, and three non-pressing parts 3n, 3o, 3p are provided where a gap is formed between the inner layer plate 3d and the conductor 6 in these locations.

即ち、導体６の外周面に対して導体６を固定する押圧力を３個所に集中させることにより、押圧部３ｋ、３ｌ、３ｍにおいて導体６のこの部分の酸化物や硫化物から成る被膜を破壊しこれを除去して、内層板３ｄとの間における電気的接続の信頼性を高めることができる。 In other words, by concentrating the pressing force that fixes the conductor 6 to the outer periphery of the conductor 6 at three points, the coating made of oxides and sulfides on this part of the conductor 6 at pressing parts 3k, 3l, and 3m is destroyed and removed, thereby improving the reliability of the electrical connection between the inner layer plate 3d.

プレス上型Ｐｕ、プレス下型Ｐｄによる押圧によって、内層板３ｂと導体６との間に、押圧部３ｋ、３ｌ、３ｍと非押圧部３ｎ、３ｏ、３ｐとが形成されまでの間には、概ね次のような現象が発生している。 By pressing with the upper press die Pu and the lower press die Pd, the following phenomena generally occur until pressed parts 3k, 3l, 3m and non-pressed parts 3n, 3o, 3p are formed between the inner layer plate 3b and the conductor 6.

外層板３ａは、プレス上型Ｐｕ、プレス下型Ｐｄによる押圧力を受けて変形し、降伏点を超えると塑性変形する。従って、プレス上型Ｐｕ、プレス下型Ｐｄによる押圧を解除しても、外層板３ａは元の形状に戻ることはない。これに対し、内層板３ｂは、プレス上型Ｐｕ、プレス下型Ｐｄによる押圧力を、外層板３ａを介して受けている。内層板３ｂのうち、外層板３ａに沿って延在する部分においては、外層板３ａに沿った形状に塑性変形する。 The outer layer plate 3a is deformed by the pressing force of the upper press die Pu and the lower press die Pd, and undergoes plastic deformation when it exceeds its yield point. Therefore, even if the pressing force of the upper press die Pu and the lower press die Pd is released, the outer layer plate 3a does not return to its original shape. In contrast, the inner layer plate 3b receives the pressing force of the upper press die Pu and the lower press die Pd through the outer layer plate 3a. The portion of the inner layer plate 3b that extends along the outer layer plate 3a undergoes plastic deformation into a shape that follows the outer layer plate 3a.

なお、内層板３ｂのうち、空隙部３ｃ、３ｄに沿って延在する部分においては、外層板３ａを介して内層板３ｂに掛かる押圧力は、内層板３ｂの端縁部３ｇ、３ｈ間の隙間３ｉを縮小させることに費やされた後に、空隙部３ｃ、３ｄを縮小させることに使われることになる。このため、外層板３ａにかかる押圧力が外層板３ａの降伏点を超えたからといって、直ちに内層板３ｂにかかる押圧力も内層板３ｂの降伏点を超えるものとはならない。そこで、このような外層板３ａと内層板３ｂとの間に存在する押圧力の掛かり方の違いを利用することによって、内層板３ｂに生ずる変形において、その全部を塑性変形へと至らしめることなく、弾性変形に留まる部分を残すことができる。 In the portion of the inner layer 3b that extends along the gaps 3c and 3d, the pressing force applied to the inner layer 3b through the outer layer 3a is used to reduce the gap 3i between the edge portions 3g and 3h of the inner layer 3b, and is then used to reduce the gaps 3c and 3d. Therefore, even if the pressing force applied to the outer layer 3a exceeds the yield point of the outer layer 3a, the pressing force applied to the inner layer 3b does not immediately exceed the yield point of the inner layer 3b. Therefore, by utilizing the difference in the way the pressing force is applied between the outer layer 3a and the inner layer 3b, it is possible to prevent the entire deformation of the inner layer 3b from becoming plastic, and to leave a portion that remains elastically deformed.

従って、プレス上型Ｐｕ、プレス下型Ｐｄによる押圧を解除すると、内層板３ｂにおいて、弾性変形により縮小した空隙部３ｃ、３ｄが元の大きさへと拡大しようとする弾性復元力が生ずる。この弾性復元力は、内層板３ｂのうち、空隙部３ｃ、３ｄに沿って延在する部分を外層板３ａから離間させる方向に、つまり内方へと押し戻そうとする。このとき、内方へと押し戻されようとする内層板３ｂは、導体６と接して導体６を押圧し、内層板３ｂは導体６に対して付勢力を伴って接し、導体６が内層板３ｂの間に圧着されることになる。 Therefore, when the pressure from the upper press die Pu and the lower press die Pd is released, an elastic restoring force is generated in the inner layer plate 3b, which causes the gaps 3c and 3d, which have been reduced in size by elastic deformation, to expand to their original size. This elastic restoring force tries to push the parts of the inner layer plate 3b that extend along the gaps 3c and 3d in a direction that separates them from the outer layer plate 3a, that is, inward. At this time, the inner layer plate 3b, which is being pushed back inward, comes into contact with the conductor 6 and presses it, and the inner layer plate 3b comes into contact with the conductor 6 with a biasing force, and the conductor 6 is crimped between the inner layer plates 3b.

そして、本実施例はこのような加締めを可能とする第１、第２圧着片３ｅ、３ｆと、単体から成る導体６とを組み合わせることによって、次のような作用効果が得られることになる。 In this embodiment, by combining the first and second crimping pieces 3e and 3f, which enable such crimping, with the conductor 6, which is made of a single piece, the following effects are obtained.

導体が複数本の芯線を撚り合わせて成る場合においては、各芯線の間に隙間が存在するため、導体が内層板３ｂによって押圧されると、各芯線は互いの間の隙間を埋めるようにして移動する。その結果、導体の全体としての形状は、内層板３ｂに囲まれた空間の形状に沿う形状へと変化する。このため、内層板３ｂからの押圧力は各芯線を移動させることに使われるため、各芯線が内層板３ｂから受ける押圧力は、導体が単線のものから成る場合に比較して小さい。このことに応じて、各芯線の表面を覆う酸化物等の被膜が破壊される程度もまた小さいものとなる。 When a conductor is made of multiple twisted core wires, there are gaps between each core wire, so when the conductor is pressed by the inner layer plate 3b, the core wires move to fill the gaps between them. As a result, the overall shape of the conductor changes to a shape that conforms to the shape of the space surrounded by the inner layer plate 3b. Because the pressing force from the inner layer plate 3b is used to move each core wire, the pressing force that each core wire receives from the inner layer plate 3b is smaller than when the conductor is made of a single wire. Accordingly, the degree to which the oxide or other coating that covers the surface of each core wire is destroyed is also smaller.

これに対し、導体６が単体である場合においては、導体が複数本の芯線を撚り合わせて成る場合のように各芯線の移動を伴わないことから、内層板３ｂからの押圧力は導体６の３個所に集中して掛かり続けることとなる。その結果として、導体６と内層板３ｂとの接触面積は小さくなるものの、導体６と内層板３ｂとが接する３個所の押圧部３ｋ、３ｌ、３ｍにおいて、大きな付勢力を伴う接触を可能とし、十分な機械的性能、電気的性能が得られ、更には酸化物等から成る被膜の破壊除去をも可能とする。 In contrast, when the conductor 6 is a single piece, the core wires do not move as they do when the conductor is made of multiple twisted core wires, and so the pressing force from the inner layer plate 3b continues to be concentrated at three points on the conductor 6. As a result, although the contact area between the conductor 6 and the inner layer plate 3b is small, contact with a large pressing force is possible at the three pressing points 3k, 3l, and 3m where the conductor 6 and the inner layer plate 3b come into contact, providing sufficient mechanical and electrical performance and even enabling the destruction and removal of the coating made of oxides, etc.

上述の作用効果は、導体として複数本の芯線を撚り合わせて成るものを採用した場合からは、予見することができず、単体の導体６を使用する本発明において新たに見出されたものである。即ち、導体として複数本の芯線を撚り合わせて成るものを採用した場合には、断面において周面で接触するに対し、導体として単線を採用した場合には複数の点で接触することにおいて、両者の発想は互いに異なる。 The above-mentioned effects could not be predicted when a conductor made of multiple twisted core wires is used, but were newly discovered in the present invention, which uses a single conductor 6. In other words, when a conductor made of multiple twisted core wires is used, the conductor makes contact at the circumferential surface in cross section, whereas when a solid wire is used as the conductor, the conductor makes contact at multiple points, and the two concepts are different.

このように、空隙部３ｃ、３ｄに加えて、導体６の上方及び下方両側と内層板３ｂとの間に、３個所の非押圧部３ｎ、３ｏ、３ｐを設けて、外層板３ａ、内層板３ｂにより導体６を加締めることにより、図１０に示すように、空隙部３ｃ、３ｄ、非押圧部３ｎ、３ｏ、３ｐが更に縮小された接続端子による導体圧着構造が得られる。この構造により、導体６への加締めは、弾力性を保持しながら確実になされ、電気的、機械的な信頼性が確保されることになる。 In this way, in addition to the gaps 3c and 3d, three non-pressurized portions 3n, 3o, and 3p are provided between the upper and lower sides of the conductor 6 and the inner plate 3b, and the conductor 6 is crimped by the outer plate 3a and the inner plate 3b, resulting in a conductor crimping structure with a connection terminal in which the gaps 3c, 3d and the non-pressurized portions 3n, 3o, and 3p are further reduced, as shown in Figure 10. With this structure, the conductor 6 is crimped reliably while retaining its elasticity, ensuring electrical and mechanical reliability.

また、被覆圧着部４においては、導体圧着装置と連動する被覆圧着装置によって、絶縁被覆部７の外側を被覆圧着部４の一対の被覆圧着片４ａ、４ｂにより加締めることにより、辺部４ｃ、４ｄが絶縁被覆部７に喰い込むようにして圧着される。これにより、被覆圧着部４により絶縁被覆部７を固定し、電線に作用する引抜力に対抗することができる。 In addition, in the coating crimping part 4, the outer side of the insulating coating part 7 is crimped by a pair of coating crimping pieces 4a, 4b of the coating crimping part 4 using a coating crimping device that works in conjunction with the conductor crimping device, so that the sides 4c, 4d are crimped so as to bite into the insulating coating part 7. This allows the insulating coating part 7 to be fixed by the coating crimping part 4 and to resist the pulling force acting on the electric wire.

図１１は導体６を導体圧着部３の圧着前部３Ｘ、圧着後部３Ｙにより圧着接続し、被覆圧着部４では被覆圧着片４ａ、４ｂにより絶縁被覆部７を圧着固定した状態を示している。 Figure 11 shows the state in which the conductor 6 is crimped and connected by the front crimping part 3X and rear crimping part 3Y of the conductor crimping part 3, and the insulating coating part 7 is crimped and fixed by the coating crimping pieces 4a and 4b in the coating crimping part 4.

なお、実施例においては、導体圧着部３は前後に圧着前部３Ｘと圧着後部３Ｙに分けて設けたが、このように分けることなく、導体圧着部３の全体をこれらの何れか一方のみの形状とすることもできる。また、内層板３ｂの長さは左右均等な長さとし、左右対称形としてもよい。 In the embodiment, the conductor crimping section 3 is divided into a front crimping section 3X and a rear crimping section 3Y, but the entire conductor crimping section 3 may have only one of these shapes without being divided in this way. Also, the length of the inner layer plate 3b may be equal on the left and right, and may be symmetrical on the left and right.

更に、実施例においては、空隙部３ｃ、３ｄを圧着接続端子１に予め形成しておいたが、導体圧着工程時において、プレス上型Ｐｕの形状によって、外層板３ａと内層板３ｂとの間に空隙部３ｃ、３ｄを形成することもできる。 Furthermore, in the embodiment, the gaps 3c and 3d are formed in advance in the crimp connection terminal 1, but during the conductor crimping process, the gaps 3c and 3d can also be formed between the outer layer plate 3a and the inner layer plate 3b depending on the shape of the press upper die Pu.

なお、本明細書で使用する上下、左右、前後の用語は、図面の説明のために使用しており、本発明を限定するものではない。 Note that the terms up, down, left, right, front, back, and back used in this specification are used to explain the drawings and are not intended to limit the present invention.

１ 圧着接続端子
２ 接続部
３ 導体圧着部
３Ｘ 圧着前部
３Ｙ 圧着後部
３ａ 外層板
３ｂ 内層板
３ｃ、３ｄ 空隙部
３ｅ、３ｆ 圧着片
３ｋ、３ｌ、３ｍ 押圧部
３ｎ、３ｏ、３ｐ 非押圧部
４ 被覆圧着部
５ 導電金属板
６ 導体
７ 絶縁被覆部 REFERENCE SIGNS LIST 1 Crimp connection terminal 2 Connection portion 3 Conductor crimping portion 3X Crimping front portion 3Y Crimping rear portion 3a Outer layer plate 3b Inner layer plate 3c, 3d Space portion 3e, 3f Crimping piece 3k, 3l, 3m Pressing portion 3n, 3o, 3p Non-pressing portion 4 Covering crimping portion 5 Conductive metal plate 6 Conductor 7 Insulating cover portion

Claims (3)

導電金属板を打抜き、折曲して導体圧着部を形成し、該導体圧着部の底部からＵ字状に立ち上げた一対の圧着片を有する圧着接続端子を用いて、前記圧着片により単体の金属線から成る断面円形の導体を加締めて固定した接続端子による導体圧着構造であって、
前記各圧着片は、外層板と、該外層板の上端部の折り返し部から内側に折り返して前記外層板に積層した内層板とから成る二層構造であり、
前記外層板と前記内層板との間の前記折り返し部の内側には、それぞれ空隙部を設け、
前記内層板と前記導体の間には、前記底部及び一対の前記空隙部が存在する上方左右から前記導体の中心に向けた３方向から集中して掛かる押圧力によって前記内層板に対して変形を与えて形成される３個所の押圧部と、これらの押圧部の形成に伴い前記押圧部同士の間に形成される３個所の非押圧部とを備え、
前記３個所の押圧部による前記３方向からの付勢力を伴う接触によって前記導体を加締めて圧着固定した際に、前記３個所の非押圧部には空隙が生じていることを特徴とする接続端子による導体圧着構造。 A conductor crimping structure using a connection terminal, in which a conductor crimping portion is formed by punching and bending a conductive metal plate, and a crimping connection terminal having a pair of crimping pieces standing up in a U-shape from a bottom of the conductor crimping portion is used to crimp and fix a conductor having a circular cross section made of a single metal wire by the crimping pieces,
Each of the pressure-bonding pieces has a two-layer structure including an outer layer plate and an inner layer plate folded inward from a folded-back portion at an upper end of the outer layer plate and laminated on the outer layer plate,
A gap is provided on the inside of the folded portion between the outer layer board and the inner layer board,
Between the inner layer board and the conductor , there are three pressed parts formed by deforming the inner layer board by concentrated pressing forces applied from three directions toward the center of the conductor from the upper left and right sides where the bottom and the pair of voids are present, and three non-pressed parts formed between the pressed parts due to the formation of these pressed parts ,
A conductor crimping structure using a connection terminal, characterized in that when the conductor is crimped and fixed by contact with the three pressing portions accompanied by a biasing force from the three directions, gaps are generated in the three non-pressing portions . 前記導体に対する前記３方向の押圧力は、略１２０度間隔の方向から加えたことを特徴とする請求項１に記載の接続端子による導体圧着構造。 2. The conductor crimping structure using a connection terminal according to claim 1 , wherein the pressure forces in the three directions are applied to the conductor from directions spaced apart by approximately 120 degrees. 前記外層板と前記内層板との間に設けた前記空隙部は、前記圧着接続端子に予め形成しておいたことを特徴とする請求項１又は２に記載の接続端子による導体圧着構造。 3. A conductor crimping structure using a connection terminal according to claim 1, wherein the gap provided between the outer plate and the inner plate is formed in advance in the crimp connection terminal.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4997386B2 (en) 2006-03-17 2012-08-08 学校法人金沢工業大学 Signal component calculation device and measurement device
JP5622785B2 (en) 2011-04-21 2014-11-12 大成プラス株式会社 Aluminum alloy-resin composite and method for producing the same
JP2019204653A (en) 2018-05-23 2019-11-28 株式会社オートネットワーク技術研究所 Electric wire with terminal
JP2020064751A (en) 2018-10-17 2020-04-23 矢崎総業株式会社 Terminal structure
WO2021131661A1 (en) 2019-12-24 2021-07-01 パナソニックＩｐマネジメント株式会社 Electric device
JP2021099905A (en) 2019-12-20 2021-07-01 株式会社デルタプラス Crimp connection terminal

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4997386B2 (en) 2006-03-17 2012-08-08 学校法人金沢工業大学 Signal component calculation device and measurement device
JP5622785B2 (en) 2011-04-21 2014-11-12 大成プラス株式会社 Aluminum alloy-resin composite and method for producing the same
JP2019204653A (en) 2018-05-23 2019-11-28 株式会社オートネットワーク技術研究所 Electric wire with terminal
JP2020064751A (en) 2018-10-17 2020-04-23 矢崎総業株式会社 Terminal structure
JP2021099905A (en) 2019-12-20 2021-07-01 株式会社デルタプラス Crimp connection terminal
WO2021131661A1 (en) 2019-12-24 2021-07-01 パナソニックＩｐマネジメント株式会社 Electric device

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