JP2019057392A - Crimp terminal, terminal with electric wire, and manufacturing method of the same - Google Patents

Crimp terminal, terminal with electric wire, and manufacturing method of the same Download PDF

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JP2019057392A
JP2019057392A JP2017180344A JP2017180344A JP2019057392A JP 2019057392 A JP2019057392 A JP 2019057392A JP 2017180344 A JP2017180344 A JP 2017180344A JP 2017180344 A JP2017180344 A JP 2017180344A JP 2019057392 A JP2019057392 A JP 2019057392A
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conductor
bottom plate
electric wire
width direction
terminal
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博規 北川
Hirochika Kitagawa
博規 北川
伊藤 直樹
Naoki Ito
直樹 伊藤
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Yazaki Corp
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Yazaki Corp
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Abstract

To suppress a thin of a bottom plate part of a conductive crimp part after crimping against a conductor.SOLUTION: A cross sectional U-shaped conductive crimp part 10 includes: a bottom plate part 11; and a pair of conductor caulking pieces 12. In a width direction central part of the bottom plate part 11, a convex wall part 15 rising to an upper direction from a width direction both end part 11a by one step is formed. A step part 15a is provided in a boundary between the convex wall part 15 of the width direction central part and the width direction both end parts 11a.SELECTED DRAWING: Figure 2

Description

本発明は、U字状の導体圧着部を備えた圧着端子、その圧着端子に電線が接続された電線付端子、およびその電線付端子の製造方法に関するものである。   The present invention relates to a crimp terminal provided with a U-shaped conductor crimp part, a terminal with an electric wire in which an electric wire is connected to the crimp terminal, and a method for manufacturing the terminal with electric wire.

一般的な圧着端子は、その長手方向(電線の長手方向と一致)の一端側に、相手側端子に対して接続するための電気接続部を有し、他端側に、電線の端末部に対して加締め接続される電線接続部を有している。   A general crimp terminal has an electrical connection part for connecting to a counterpart terminal on one end side in the longitudinal direction (coinciding with the longitudinal direction of the electric wire), and is connected to the terminal part of the electric wire on the other end side. It has an electric wire connection part to be caulked and connected.

ここで、圧着端子の長手方向を前後方向といい、相手側端子に接続するための電気接続部のある側を前側、電線接続部のある側を後側という。また、圧着端子の電線接続部に対して電線を載せる側を上方、その反対側を下方、上方を基準に前方に向かって左側および右側(端子の幅方向の一方側及び他方側)を端子の左側および端子の右側という。   Here, the longitudinal direction of the crimp terminal is referred to as the front-rear direction, the side with the electrical connection part for connecting to the counterpart terminal is referred to as the front side, and the side with the wire connection part is referred to as the rear side. Also, the side on which the electric wire is placed with respect to the electric wire connecting portion of the crimp terminal is upward, the opposite side is downward, the left side and the right side (one side and the other side in the width direction of the terminal) are The left side and the right side of the terminal.

図5(a)、(b)は、従来の一般的な圧着端子の後部の構成を示す図で、図5(a)は電線接続部の斜視図、図5(b)は電線接続部の中の導体圧着部の断面図である。   5 (a) and 5 (b) are diagrams showing a configuration of a rear portion of a conventional general crimp terminal, FIG. 5 (a) is a perspective view of an electric wire connecting portion, and FIG. 5 (b) is an electric wire connecting portion. It is sectional drawing of the inside conductor crimping | compression-bonding part.

図5(a)に示す圧着端子101の電線接続部105は、前側に導体圧着部110を配置し、その後側に間隔をおいて被覆加締部120を配置した構成となっている。   The wire connection portion 105 of the crimp terminal 101 shown in FIG. 5A has a configuration in which the conductor crimp portion 110 is disposed on the front side and the covering crimping portion 120 is disposed on the rear side with an interval.

前側の導体圧着部110は、図5(b)にも示すように、底板部111と、底板部111の左右方向(底板部の幅方向ともいう)の両側縁から上方に延出した左右一対の導体加締片112、112と、を有する断面視略U字状に形成されている。一対の導体加締片112、112は、接続すべき電線の端末部の絶縁被覆を除去して露出させた導体を包み込むように内側に曲げられることで、導体を底板部111の上面に密着した状態となるように加締めるものである。   As shown in FIG. 5 (b), the front conductor crimping portion 110 includes a pair of left and right sides extending upward from both the bottom plate portion 111 and both side edges of the bottom plate portion 111 (also referred to as the width direction of the bottom plate portion). Are formed in a substantially U shape in a sectional view. The pair of conductor crimping pieces 112, 112 are bent inward so as to wrap the exposed conductor by removing the insulation coating of the terminal portion of the electric wire to be connected, thereby closely attaching the conductor to the upper surface of the bottom plate portion 111. It is caulked to be in a state.

従来の圧着端子101では、導体圧着部110の底板部111や導体加締片112は、表裏面フラットな板状体をプレス曲げ加工することで形成されており、導体に接する内面もその反対の外面も凹凸のない平面ないし曲面として形成されている。なお、図5(a)に示すように、導体圧着部110の内面に、必要に応じて、電線の長手方向と交差する左右方向に延びるセレーション(凹溝)116が設けられることも多い。   In the conventional crimp terminal 101, the bottom plate portion 111 and the conductor crimping piece 112 of the conductor crimp portion 110 are formed by press-bending a flat plate on the front and back surfaces, and the inner surface in contact with the conductor is opposite to that. The outer surface is also formed as a flat or curved surface with no irregularities. In addition, as shown to Fig.5 (a), the serration (concave groove) 116 extended in the left-right direction which cross | intersects the longitudinal direction of an electric wire is often provided in the inner surface of the conductor crimping | compression-bonding part 110 as needed.

また、後側の被覆加締部120も、底板部121と、該底板部121の左右幅方向の両側縁から上方に延出した左右一対の被覆加締片122、122と、を有する断面視略U字状に形成されている。左右一対の被覆加締片122、122は、接続すべき電線の端末部の絶縁被覆の付いた部分を包み込むように内側に曲げられることで、電線の端末部の絶縁被覆部分を底板部121の上面に密着した状態となるように加締めるものである。通常、導体圧着部110の底板部111および被覆加締部120の底板部121は、前方の電気接続部の底板部103と共通の底板部として連続して形成されている。   Further, the rear cover crimping portion 120 also includes a bottom plate portion 121 and a pair of left and right cover crimping pieces 122 and 122 extending upward from both side edges of the bottom plate portion 121 in the left-right width direction. It is formed in a substantially U shape. The pair of left and right coating crimping pieces 122 and 122 are bent inward so as to wrap the portion with the insulation coating of the terminal portion of the electric wire to be connected, so that the insulation coating portion of the terminal portion of the electric wire It crimps so that it may be in the state contact | adhered to the upper surface. Usually, the bottom plate portion 111 of the conductor crimping portion 110 and the bottom plate portion 121 of the covering crimping portion 120 are continuously formed as a common bottom plate portion with the bottom plate portion 103 of the front electrical connection portion.

この圧着端子101に電線の端末部を接続する場合には、下型(アンビル)の上に圧着端子101を載せて、圧着端子101の電線接続部105の内側に電線の端末部を挿入し、上型(クリンパ)を下型に対して相対的に下降させることで行う。   When connecting the terminal portion of the electric wire to the crimp terminal 101, the crimp terminal 101 is placed on the lower mold (anvil), and the terminal portion of the electric wire is inserted inside the electric wire connecting portion 105 of the crimp terminal 101, This is done by lowering the upper mold (crimper) relative to the lower mold.

図6(a)〜(c)は、従来の圧着端子101の導体圧着部110を電線の端末部の導体Waに加締める工程の説明図で、図6(a)は導体圧着部110の内側に導体Waを挿入して圧着を始めた初期の段階を示す断面図、図6(b)は導体加締片112が内側に曲げられて導体Waに圧力がかかり始めた段階を示す断面図、図6(c)は圧着完了後の状態を示す断面図である。   6A to 6C are explanatory views of a process of crimping the conductor crimping portion 110 of the conventional crimp terminal 101 to the conductor Wa of the terminal portion of the electric wire, and FIG. 6A is an inner side of the conductor crimping portion 110. FIG. 6B is a cross-sectional view showing a stage where the conductor caulking piece 112 is bent inward and pressure is applied to the conductor Wa; FIG.6 (c) is sectional drawing which shows the state after completion | finish of crimping | compression-bonding.

導体圧着部110を電線の導体Waに加締める場合は、まず、図6(a)に示すように、下型(アンビル)Nの載置面上に導体圧着部110を載せて、導体圧着部110の内側に電線の端末部の導体Waを挿入する。そして、上型(クリンパ)Mを下型Nに対して相対的に矢印Fのように下降させる。そうすると、上型Mの案内面Maが一対の導体加締片112、112の先端に接触し、案内面Maの働きで、一対の導体加締片112、112が徐々に内側に曲げられて行く。   When crimping the conductor crimping part 110 to the conductor Wa of the electric wire, first, as shown in FIG. 6A, the conductor crimping part 110 is placed on the mounting surface of the lower mold (anvil) N, and the conductor crimping part is placed. The conductor Wa of the terminal portion of the electric wire is inserted inside 110. Then, the upper mold (crimper) M is lowered relative to the lower mold N as shown by an arrow F. Then, the guide surface Ma of the upper mold M comes into contact with the tips of the pair of conductor crimping pieces 112 and 112, and the pair of conductor crimping pieces 112 and 112 are gradually bent inward by the action of the guide surface Ma. .

上型Mを続けて下降させると、図6(b)に示すように、一対の導体加締片112、112がさらに内側に曲げられて行き、導体加締片112の先端が導体Waに接触する。この段階までは、上型Mから加わる力は、主に導体加締片112の曲げに使われるため、導体Waにはほとんど作用しない。   When the upper mold M is continuously lowered, as shown in FIG. 6B, the pair of conductor crimping pieces 112 and 112 are further bent inward, and the tip of the conductor crimping piece 112 contacts the conductor Wa. To do. Until this stage, the force applied from the upper mold M is mainly used for bending the conductor crimping piece 112, and therefore hardly acts on the conductor Wa.

この段階から導体Waを圧縮する工程が進む。圧縮工程に入ると、導体加締片112から導体Waに伝わる圧縮力が底板部111を押す押圧力T11として作用する。上型Mをさらに下降させて行くと、図6(c)に示すように、上型Mの案内面Maの中央の山形湾曲面の働きで、一対の導体加締片112、112の先端が導体Wa側に折り返すように丸められて行き、それら先端同士が擦れ合いながら導体Waに食い込む。その結果、導体Waを包むように導体加締片112、112が加締められて、導体Waが底板部111の上面に密着した状態になる。   From this stage, the process of compressing the conductor Wa proceeds. When entering the compression process, the compression force transmitted from the conductor crimping piece 112 to the conductor Wa acts as a pressing force T11 that presses the bottom plate portion 111. When the upper mold M is further lowered, as shown in FIG. 6C, the tips of the pair of conductor crimping pieces 112 and 112 are moved by the action of the central curved surface of the guide surface Ma of the upper mold M. It is rolled so as to be folded back toward the conductor Wa, and bites into the conductor Wa while the tips thereof rub against each other. As a result, the conductor crimping pieces 112 and 112 are crimped so as to wrap the conductor Wa, and the conductor Wa comes into close contact with the upper surface of the bottom plate portion 111.

このように導体加締片112、112が加締められることによって、圧着端子を構成する導電性金属と電線の導体とが凝着(分子や原子レベルで結合)することになる。その結果、圧着端子と電線とが電気的および機械的に強く結合されることになる。   When the conductor crimping pieces 112 and 112 are crimped in this way, the conductive metal constituting the crimp terminal and the conductor of the electric wire are adhered (bonded at the molecular or atomic level). As a result, the crimp terminal and the electric wire are strongly and electrically coupled.

ところで、上述したような圧着工程の際に、導体Waに対して上から圧縮力が加わることで、導体Waから底板部111に強い押圧力T11が加わる。このため、この強い押圧力T11を底板部111が受ける影響で、図6(c)に示すように、圧着後の断面において、底板部111の肉厚Q11が薄くなる傾向があることが分かった。底板部111の肉厚Q11が薄くなると、圧着部の剛性が低下して電気性能が悪くなる可能性がある。   By the way, in the crimping process as described above, a strong pressing force T11 is applied from the conductor Wa to the bottom plate portion 111 by applying a compressive force to the conductor Wa from above. For this reason, it has been found that due to the influence of the strong pressing force T11 on the bottom plate portion 111, the thickness Q11 of the bottom plate portion 111 tends to be thin in the cross section after crimping, as shown in FIG. 6C. . If the thickness Q11 of the bottom plate portion 111 is thinned, the rigidity of the crimping portion may be lowered and the electrical performance may be deteriorated.

一方、特許文献1に、導体圧着部に、内面側に向けて一段盛り上がった固着壁(凸壁部に相当)を設け、固着壁とその周辺部との間に段差状の肉厚の係止部を設けた圧着端子が開示されている。   On the other hand, in Patent Document 1, a fixing wall (corresponding to a convex wall portion) raised one step toward the inner surface side is provided in the conductor crimping portion, and a step-like thick locking is provided between the fixing wall and its peripheral portion. A crimp terminal provided with a portion is disclosed.

図7(a)、(b)は、その圧着端子の電線接続部の構成を示す図で、図7(a)は電線接続部の展開図、図7(b)は図7(a)のC−C矢視断面に相当する曲げ加工後の状態における断面図である。   7 (a) and 7 (b) are diagrams showing the configuration of the wire connection portion of the crimp terminal, FIG. 7 (a) is a development view of the wire connection portion, and FIG. 7 (b) is a view of FIG. 7 (a). It is sectional drawing in the state after the bending process corresponded to CC arrow cross section.

図7(a)に示すように、この圧着端子201の電線接続部205も、前側に導体圧着部210を配置し、その後側に間隔をおいて被覆加締部220を配置した構成となっている。   As shown in FIG. 7A, the electric wire connecting portion 205 of the crimp terminal 201 also has a configuration in which the conductor crimping portion 210 is disposed on the front side and the covering crimping portion 220 is disposed on the rear side with an interval. Yes.

前側の導体圧着部210は、図5(b)に示すように、底板部211と、底板部211の左右方向(底板部の幅方向ともいう)の両側縁から上方に延出した左右一対の導体加締片212、212と、を有する断面視略U字状に形成されている。   As shown in FIG. 5B, the conductor crimping portion 210 on the front side includes a bottom plate portion 211 and a pair of left and right sides extending upward from both lateral edges of the bottom plate portion 211 (also referred to as the width direction of the bottom plate portion). The conductor crimping pieces 212 and 212 are formed in a substantially U shape in a sectional view.

そして、この導体圧着部210では、底板部211から両導体加締片212、212に亘る広い範囲L11に、内面側に向けて一段盛り上がった固着壁(凸壁部に相当)215が設けられている。また、その固着壁215とその周辺部との間に、段差状の肉厚の係止部215aが設けられている。   In this conductor crimping portion 210, a fixing wall (corresponding to a convex wall portion) 215 raised one step toward the inner surface side is provided in a wide range L11 extending from the bottom plate portion 211 to both conductor crimping pieces 212 and 212. Yes. Further, a stepped thick locking portion 215a is provided between the fixing wall 215 and the peripheral portion thereof.

このように構成されていることで、導体圧着部210を導体に圧着した状態で、段差状の係止部215aが導体に引っ掛かることになる。そのため、導体と導体圧着部との固着力が向上する。また、導体を圧着するときの加締め力が大きくても、肉厚の大きい係止部215aは変形し難いので、係止部215aにおける導体との係止代が減少することもなく、高い固着力の発揮に貢献できる、としている。   By being configured in this manner, the stepped locking portion 215a is caught by the conductor in a state where the conductor crimping portion 210 is crimped to the conductor. Therefore, the adhering force between the conductor and the conductor crimping portion is improved. Further, even if the caulking force when crimping the conductor is large, the locking portion 215a having a large thickness is difficult to be deformed, so that the locking allowance with the conductor in the locking portion 215a is not reduced, and a high rigidity is secured. It is said that it can contribute to the display of wearing power.

ところが、特許文献1に記載の圧着端子201では、固着壁215が設けられている範囲L11が、底板部211から導体加締片212の先端近くまでに至る大きな領域であるため、圧着時に、導体の全周に強い圧縮力が作用することになる。そのため、導体に加わる大きな圧縮力の影響で、底板部211の薄肉化が却って進行しやすい可能性がある。   However, in the crimp terminal 201 described in Patent Document 1, the range L11 in which the fixing wall 215 is provided is a large region from the bottom plate portion 211 to the vicinity of the tip of the conductor crimping piece 212. A strong compressive force is applied to the entire circumference. Therefore, there is a possibility that the thinning of the bottom plate portion 211 tends to proceed on the contrary due to the influence of a large compressive force applied to the conductor.

特開2010−55875号公報JP 2010-55875 A

本発明は、上述した事情に鑑みてなされたものであり、その目的は、導体に対する圧着後の導体圧着部の底板部の薄肉化を抑制し、圧着部の剛性を高めて電気性能の安定を図ることのできる圧着端子、その圧着端子に電線が接続された電線付端子、およびその電線付端子の製造方法を提供することにある。   The present invention has been made in view of the above-described circumstances, and its purpose is to suppress the thinning of the bottom plate portion of the conductor crimping portion after crimping to the conductor, and to increase the rigidity of the crimping portion to stabilize the electrical performance. An object of the present invention is to provide a crimp terminal that can be achieved, a terminal with an electric wire in which an electric wire is connected to the crimp terminal, and a method for manufacturing the terminal with an electric wire.

前述した目的を達成するために、本発明に係る圧着端子、電線付端子、その製造方法は、下記(1)〜(3)を特徴としている。
(1) 電線の端末部の露出した導体に圧着接続される断面U字状の導体圧着部が、
幅方向中央部に幅方向両端部よりも上方に一段盛り上がった凸壁部を有すると共に、幅方向中央部の前記凸壁部と幅方向両端部との境界に段差部を有し、上面に前記導体が載置される底板部と、
前記底板部の幅方向両端部より幅方向外側に位置する幅方向両側縁からそれぞれ上方に延出し、前記導体を包み込むように内側に曲げられることで、前記導体を前記底板部の上面に密着状態で加締める一対の導体加締片と、
を備える、
ことを特徴とする圧着端子。
(2) 上記(1)に記載の圧着端子に電線の端末部が接続された電線付端子であって、
前記底板部の上面に前記電線の端末部の露出した導体が載置され、前記一対の導体加締片が前記導体を包み込むように内側に曲げられることで、前記導体が前記底板部の上面に密着状態で加締められており、加締め圧力により前記段差部が潰れることで、前記底板部の幅方向中央部に形成された前記凸壁部が、前記底板部の幅方向両端部と同じ高さに平坦化されている、
ことを特徴とする電線付端子。
(3) 上記(1)に記載の圧着端子に電線を圧着接続することで電線付端子を製造する方法であって、
下型の上に載せた前記圧着端子の前記底板部の上面に前記電線の端末部の露出した導体を載置し、その状態で、上型を下型に対して相対的に下降させることにより、上型の案内面によって、前記一対の導体加締片を、前記導体を包み込むように内側に曲げて、前記導体を前記底板部の上面に密着状態で加締め、その際の加締め圧力により前記段差部を潰すことで、前記底板部の幅方向中央部に形成された前記凸壁部を、前記底板部の幅方向両端部と同じ高さに平坦化する、
ことを特徴とする電線付端子の製造方法。
In order to achieve the above-described object, the crimp terminal, the terminal with electric wire, and the manufacturing method thereof according to the present invention are characterized by the following (1) to (3).
(1) A conductor crimping portion having a U-shaped cross section that is crimped and connected to the exposed conductor of the end portion of the electric wire,
It has a convex wall portion that is raised one step above both ends in the width direction at the center portion in the width direction, and has a step portion at the boundary between the convex wall portion in the center portion in the width direction and both end portions in the width direction. A bottom plate on which the conductor is placed;
The conductors are in close contact with the upper surface of the bottom plate part by extending upward from both side edges in the width direction located on the outer side in the width direction from both ends in the width direction of the bottom plate part and bending inward so as to wrap the conductor. A pair of conductor caulking pieces to be caulked with,
Comprising
Crimp terminal characterized by that.
(2) A terminal with electric wire in which a terminal portion of an electric wire is connected to the crimp terminal according to (1) above,
The exposed conductor of the end portion of the electric wire is placed on the upper surface of the bottom plate portion, and the pair of conductor crimping pieces are bent inward so as to wrap the conductor, so that the conductor is placed on the upper surface of the bottom plate portion. The convex wall portions formed at the center in the width direction of the bottom plate portion have the same height as both end portions in the width direction of the bottom plate portion. Flattened,
This is a terminal with electric wires.
(3) A method of manufacturing a terminal with electric wires by crimping and connecting an electric wire to the crimp terminal according to (1),
By placing the exposed conductor of the terminal portion of the electric wire on the upper surface of the bottom plate portion of the crimp terminal placed on the lower die, and lowering the upper die relative to the lower die in this state The pair of conductor crimping pieces are bent inward so as to wrap the conductor by the upper guide surface, and the conductor is crimped in close contact with the upper surface of the bottom plate portion, and the crimping pressure at that time By flattening the stepped portion, the convex wall portion formed in the center portion in the width direction of the bottom plate portion is flattened to the same height as both end portions in the width direction of the bottom plate portion.
The manufacturing method of the terminal with an electric wire characterized by the above-mentioned.

上記(1)の構成の圧着端子によれば、圧着時に導体から底板部に加わる押圧力により段差部が潰れながら凸壁部が押し下げられる。そのため、段差部が潰れることで、底板部に作用する過剰な圧縮力を吸収することができ、底板部の薄肉化を抑制することができる。
すなわち、圧着工程において、底板部が下型(アンビル)の載置面に載った際に、底板部の幅方向両端部は載置面に隙間なく載るものの、凸壁部の下側には載置面との間に隙間ができる。従って、その隙間の分だけ凸壁部が下方に塑性変形する余裕が確保される。段差部が潰れるときには同時に凸壁部が前記隙間の分だけ下方に押し下げられる。その押し下げられる過程では、凸壁部が導体の押圧力から逃げることになるので、凸壁部に導体からの圧縮力が大きく作用はしない。従って、凸壁部があることにより、導体から受ける大きな圧縮力を吸収できることになるので、底板部の薄肉化を抑制できる。その結果、圧着部における電気性能の安定を図ることができる。
上記(2)の構成の電線付端子によれば、圧着時に段差部が潰れることで凸壁部が平坦化されているので、外観上は、凸壁部や段差部があったように見えないものの、底板部の薄肉化が抑制されている。
上記(3)の構成の電線付端子の製造方法によれば、圧着工程において、底板部を下型(アンビル)の載置面に載せた際に、凸壁部の下側に、下方に塑性変形できる隙間を確保することができる。従って、段差部が潰れるのに伴って凸壁部を前記隙間の分だけ下方に押し下げることができる。その押し下げる過程では、凸壁部が導体の押圧力から逃げることになるので、凸壁部に導体からの圧縮力が大きく作用はしない。従って、凸壁部があることにより、導体から受ける大きな圧縮力を吸収できることになるので、底板部の薄肉化を抑制できる。その結果、圧着部における電気性能の安定を図ることができる。
According to the crimp terminal having the configuration of (1), the convex wall portion is pushed down while the stepped portion is crushed by the pressing force applied from the conductor to the bottom plate portion during the crimping. Therefore, when the step portion is crushed, an excessive compressive force acting on the bottom plate portion can be absorbed, and thinning of the bottom plate portion can be suppressed.
That is, in the crimping process, when the bottom plate portion is placed on the placement surface of the lower mold (anvil), both end portions in the width direction of the bottom plate portion are placed on the placement surface without any gap, but placed on the lower side of the convex wall portion. There is a gap between the surface. Therefore, a margin for the plastic deformation of the convex wall portion downward is ensured by the gap. When the step portion is crushed, at the same time, the convex wall portion is pushed downward by the gap. In the process of being pushed down, the convex wall portion escapes from the pressing force of the conductor, so that the compressive force from the conductor does not act on the convex wall portion. Therefore, since the large compressive force received from the conductor can be absorbed by the presence of the convex wall portion, the bottom plate portion can be prevented from being thinned. As a result, it is possible to stabilize the electrical performance in the crimping portion.
According to the terminal with electric wire having the configuration of (2) above, since the convex wall portion is flattened by crushing the step portion during crimping, it does not appear to have a convex wall portion or a step portion on the appearance. However, thinning of the bottom plate portion is suppressed.
According to the manufacturing method of the terminal with electric wire having the configuration of (3) above, when the bottom plate portion is placed on the mounting surface of the lower mold (anvil) in the crimping step, the plastic is downwardly formed on the lower side of the convex wall portion. A gap that can be deformed can be secured. Therefore, as the stepped portion is crushed, the convex wall portion can be pushed downward by the gap. In the pushing-down process, the convex wall portion escapes from the pressing force of the conductor, so that the compressive force from the conductor does not act on the convex wall portion. Therefore, since the large compressive force received from the conductor can be absorbed by the presence of the convex wall portion, the bottom plate portion can be prevented from being thinned. As a result, it is possible to stabilize the electrical performance in the crimping portion.

本発明によれば、導体に対する圧着後の導体圧着部の底板部の薄肉化を抑制することができる。従って、圧着部の剛性を高めて電気性能の安定を図ることができる。   ADVANTAGE OF THE INVENTION According to this invention, thickness reduction of the baseplate part of the conductor crimping | compression-bonding part after crimping | bonding with respect to a conductor can be suppressed. Therefore, the rigidity of the crimping portion can be increased and the electrical performance can be stabilized.

以上、本発明について簡潔に説明した。更に、以下に説明される発明を実施するための形態(以下、「実施形態」という。)を添付の図面を参照して通読することにより、本発明の詳細は更に明確化されるであろう。   The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

図1は、本発明の実施形態の圧着端子の斜視図である。FIG. 1 is a perspective view of a crimp terminal according to an embodiment of the present invention. 図2(a)〜(c)は、本発明の実施形態の圧着端子の電線接続部の構成図で、図2(a)は展開図、図2(b)は図2(a)のA−A矢視図、図2(c)は曲げ加工後の導体圧着部の断面図である。2A to 2C are configuration diagrams of the wire connection portion of the crimp terminal according to the embodiment of the present invention. FIG. 2A is a development view, and FIG. 2B is A in FIG. FIG. 2A is a cross-sectional view of the conductor crimping portion after bending. 図3(a)〜(c)は、本発明の実施形態の圧着端子の導体圧着部を電線の導体に圧着する工程の説明図で、図3(a)は導体圧着部の内側に導体を挿入して圧着を始めた初期の段階を示す断面図、図3(b)は導体加締片が内側に曲げられて導体に圧力がかかり始めた段階を示す断面図、図3(c)は圧着完了後の状態を示す断面図である。FIGS. 3A to 3C are explanatory views of a process of crimping the conductor crimping portion of the crimp terminal of the embodiment of the present invention to the conductor of the electric wire, and FIG. 3A is a diagram illustrating the conductor inside the conductor crimping portion. FIG. 3B is a cross-sectional view showing an initial stage where insertion and crimping are started, FIG. 3B is a cross-sectional view showing a stage where the conductor crimping piece is bent inward and pressure is applied to the conductor, and FIG. It is sectional drawing which shows the state after crimping completion. 図4は、導体圧着部の圧着後の状態を示す拡大断面図である。FIG. 4 is an enlarged sectional view showing a state after the crimping of the conductor crimping portion. 図5(a)、(b)は、従来の一般的な圧着端子の後部の構成を示す図で、図5(a)は電線接続部の斜視図、図5(b)は電線接続部の中の導体圧着部の断面図である。5 (a) and 5 (b) are diagrams showing a configuration of a rear portion of a conventional general crimp terminal, FIG. 5 (a) is a perspective view of an electric wire connecting portion, and FIG. 5 (b) is an electric wire connecting portion. It is sectional drawing of the inside conductor crimping | compression-bonding part. 図6(a)〜(c)は、従来の圧着端子の導体圧着部を電線の端末部の導体に加締める工程の説明図で、図6(a)は導体圧着部の内側に導体を挿入して圧着を始めた初期の段階を示す断面図、図6(b)は導体加締片が内側に曲げられて導体に圧力がかかり始めた段階を示す断面図、図6(c)は圧着完了後の状態を示す断面図である。6 (a) to 6 (c) are explanatory views of a process of crimping a conductor crimping portion of a conventional crimp terminal to a conductor at an end portion of an electric wire, and FIG. 6 (a) is an illustration of inserting a conductor inside the conductor crimping portion. 6B is a cross-sectional view showing the initial stage where crimping is started, FIG. 6B is a cross-sectional view showing the stage where the conductor crimping piece is bent inward and pressure is applied to the conductor, and FIG. It is sectional drawing which shows the state after completion. 図7(a)、(b)は、別の従来の圧着端子の導体圧着部の構成図で、図7(a)は展開図、図7(b)は図7(a)のC−C矢視断面に相当する曲げ加工後の導体圧着部の断面図である。7 (a) and 7 (b) are configuration diagrams of conductor crimping portions of another conventional crimp terminal, FIG. 7 (a) is a development view, and FIG. 7 (b) is a CC line of FIG. 7 (a). It is sectional drawing of the conductor crimping | compression-bonding part after the bending process corresponded to an arrow cross section.

本発明に関する具体的な実施形態について、各図を参照しながら以下に説明する。
図1は、実施形態の圧着端子の斜視図である。
図1に示す圧着端子1は、所定形状に打ち抜いた金属板体に曲げ加工を施すことによって形成されている。
この圧着端子1は、その長手方向(電線Wの長手方向と一致)の一端側に、相手側端子に対して接続するための電気接続部2を有し、他端側に、電線Wの端末部に対して加締め接続される電線接続部5を有している。
Specific embodiments relating to the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a crimp terminal according to an embodiment.
A crimp terminal 1 shown in FIG. 1 is formed by bending a metal plate body punched into a predetermined shape.
This crimp terminal 1 has an electrical connection part 2 for connecting to the counterpart terminal on one end side in the longitudinal direction (coinciding with the longitudinal direction of the electric wire W), and the terminal of the electric wire W on the other end side. It has the electric wire connection part 5 crimped and connected with respect to a part.

ここで、圧着端子1の長手方向を前後方向といい、相手側端子に接続するための電気接続部2のある側を前側、電線接続部5のある側を後側という。また、圧着端子1の電線接続部5に対して電線Wを載せる側を上方、その反対側を下方、上方を基準に前方に向かって左側および右側(端子の幅方向の一方側及び他方側)を端子の左側および端子の右側という。   Here, the longitudinal direction of the crimp terminal 1 is referred to as the front-rear direction, the side with the electrical connection portion 2 for connecting to the counterpart terminal is referred to as the front side, and the side with the wire connection portion 5 is referred to as the rear side. Further, the side on which the electric wire W is placed with respect to the electric wire connection portion 5 of the crimp terminal 1 is upward, the opposite side is downward, and the upper side is the left side and the right side toward the front (one side and the other side in the terminal width direction). Is called the left side of the terminal and the right side of the terminal.

図1に示すように、圧着端子1の電線接続部5は、前側に導体圧着部10を配置し、その後側に間隔をおいて被覆加締部20を配置した構成となっている。   As shown in FIG. 1, the wire connecting portion 5 of the crimp terminal 1 has a configuration in which a conductor crimping portion 10 is disposed on the front side and a covering crimping portion 20 is disposed on the rear side thereof with an interval.

圧着接続する電線Wは、例えば、金属細線を撚り合わせた撚線からなる導体Waと、導体Waを包囲する絶縁被覆Wbと、を備えた被覆電線である。電線Wの先端部においては、圧着端子1との接続準備として、予め、絶縁被覆Wbが除去されることにより、導体Waが露出した状態となっている。導体Waの材料としては、銅や、銅以外の金属(例えば、アルミニウムやアルミニウム合金など)が用いられる。   The electric wire W to be crimped and connected is, for example, a covered electric wire including a conductor Wa made of a stranded wire obtained by twisting metal thin wires and an insulating coating Wb surrounding the conductor Wa. At the tip of the electric wire W, the conductor Wa is exposed by removing the insulating coating Wb in advance as preparation for connection with the crimp terminal 1. As a material of the conductor Wa, copper or a metal other than copper (for example, aluminum or aluminum alloy) is used.

電線接続部5の前側に位置する導体圧着部10は、導体が載置される底板部11と、底板部11の左右方向(底板部11の幅方向ともいう)の両側縁から上方に延出した左右一対の導体加締片12、12と、を有する断面視略U字状に形成されている。一対の導体加締片12、12は、接続すべき電線Wの端末部の絶縁被覆Wbを除去して露出させた導体Waを包み込むように内側に曲げられることで、導体Waを底板部11の上面に密着した状態となるように加締めるものである。   The conductor crimping portion 10 located on the front side of the wire connecting portion 5 extends upward from the bottom plate portion 11 on which the conductor is placed and from both side edges of the bottom plate portion 11 in the left-right direction (also referred to as the width direction of the bottom plate portion 11). The left and right conductor caulking pieces 12 and 12 are formed in a substantially U shape in sectional view. The pair of conductor crimping pieces 12, 12 are bent inward so as to wrap the exposed conductor Wa by removing the insulation coating Wb from the end portion of the electric wire W to be connected. It crimps so that it may be in the state contact | adhered to the upper surface.

また、後側の被覆加締部20も、底板部21と、該底板部21の左右幅方向の両側縁から上方に延出した左右一対の被覆加締片22、22と、を有する断面視略U字状に形成されている。左右一対の被覆加締片22、22は、接続すべき電線Wの端末部の絶縁被覆Wbの付いた部分を包み込むように内側に曲げられることで、電線Wの端末部の絶縁被覆Wb部分を底板部21の上面に密着した状態となるように加締めるものである。導体圧着部10の底板部11および被覆加締部20の底板部21は、前方の電気接続部2の底板部3と共通の底板部として連続して形成されている。   Further, the rear cover crimping portion 20 also includes a bottom plate portion 21 and a pair of left and right cover crimping pieces 22 and 22 extending upward from both side edges of the bottom plate portion 21 in the left-right width direction. It is formed in a substantially U shape. The pair of left and right coating crimping pieces 22 and 22 are bent inward so as to wrap around the portion with the insulation coating Wb of the terminal portion of the electric wire W to be connected, so that the insulation coating Wb portion of the terminal portion of the electric wire W is bent. It crimps so that it may be in the state closely_contact | adhered to the upper surface of the baseplate part 21. FIG. The bottom plate portion 11 of the conductor crimping portion 10 and the bottom plate portion 21 of the covering crimping portion 20 are continuously formed as a common bottom plate portion with the bottom plate portion 3 of the front electrical connection portion 2.

図2(a)〜(c)は、実施形態の圧着端子1の電線接続部5の構成図で、図2(a)は展開図、図2(b)は図2(a)のA−A矢視図、図2(c)は曲げ加工後の導体圧着部の断面図である。   Fig.2 (a)-(c) is a block diagram of the electric wire connection part 5 of the crimp terminal 1 of embodiment, FIG.2 (a) is an expanded view, FIG.2 (b) is A- of Fig.2 (a). FIG. 2A is a cross-sectional view of the conductor crimping portion after bending.

図2(a)〜(c)に示すように、導体圧着部10の底板部11の幅方向(左右方向)中央部には、幅方向両端部11a、11aよりも上方(内面側)に一段盛り上がった凸壁部15が設けられている。凸壁部15の上面は、ほぼフラットに形成されている。また、幅方向中央部の凸壁部15と幅方向両端部11a、11aとの境界には、底板部11の板厚程度の高さの段差部15a、15aが設けられている。従って、図2(c)に示すように、導体圧着部10の断面は略W字形状になっている。また、凸壁部15は、圧着端子1の長手方向に沿う導体加締片12の長さと同程度の長さにわたって、当該長手方向に沿って導体圧着部10の底板部11に形成されている。これにより、一対の導体加締片12、12と凸壁部15は、凸壁部15が一対の導体加締片12、12に挟まれた状態で圧着端子1の幅方向に横並びされた位置関係となる。   As shown in FIGS. 2A to 2C, the bottom plate portion 11 of the conductor crimping portion 10 has a central portion in the width direction (left and right direction) above the width direction both ends 11 a and 11 a (inner surface side). A raised convex wall portion 15 is provided. The upper surface of the convex wall part 15 is formed substantially flat. Further, stepped portions 15a and 15a having a height approximately equal to the thickness of the bottom plate portion 11 are provided at the boundary between the convex wall portion 15 at the center in the width direction and the both ends 11a and 11a in the width direction. Therefore, as shown in FIG. 2C, the cross section of the conductor crimping portion 10 is substantially W-shaped. Further, the convex wall portion 15 is formed on the bottom plate portion 11 of the conductor crimping portion 10 along the longitudinal direction over the same length as the length of the conductor crimping piece 12 along the longitudinal direction of the crimp terminal 1. . Accordingly, the pair of conductor crimping pieces 12 and 12 and the convex wall portion 15 are arranged side by side in the width direction of the crimp terminal 1 with the convex wall portion 15 being sandwiched between the pair of conductor crimping pieces 12 and 12. It becomes a relationship.

ここで、底板部11とは、圧着前および圧着過程において、下型(アンビル)N(図3参照)の載置面に載る範囲を指す。図2(c)に示す寸法Lの範囲が底板部11に相当する。底板部11の幅方向中央部に位置する凸壁部15は、底板部11の幅方向両端部11a、11bを残して、底板部11に形成されている。従って、凸壁部15の幅L1は、底板部11の幅Lよりも小さい。   Here, the bottom plate portion 11 refers to a range on the placement surface of the lower mold (anvil) N (see FIG. 3) before and during the crimping process. A range of the dimension L shown in FIG. 2C corresponds to the bottom plate portion 11. The convex wall portion 15 located at the center portion in the width direction of the bottom plate portion 11 is formed in the bottom plate portion 11 with the width direction both end portions 11 a and 11 b of the bottom plate portion 11 being left. Accordingly, the width L1 of the convex wall portion 15 is smaller than the width L of the bottom plate portion 11.

導体圧着部10の内面10Aは、圧着状態で導体Waに接する面であり、その内面10Aには、導体Waと交差する方向に沿って複数のセレーション16が設けられている。底板部11の全体の肉厚は変わらないので、底板部11の外面10Bには、凸壁部15が設けられた箇所に凹所15cが設けられている。従って、凸壁部15やこの凹所15cを囲むように段差部15aが位置している。   The inner surface 10A of the conductor crimping portion 10 is a surface that contacts the conductor Wa in a crimped state, and a plurality of serrations 16 are provided on the inner surface 10A along the direction intersecting the conductor Wa. Since the entire thickness of the bottom plate part 11 does not change, the outer surface 10B of the bottom plate part 11 is provided with a recess 15c where the convex wall part 15 is provided. Accordingly, the step portion 15a is positioned so as to surround the convex wall portion 15 and the recess 15c.

次に、この圧着端子1に電線Wの端末部を圧着接続する手順を説明する。この説明の中に、圧着端子1に電線Wの端末部を接続して構成した電線付端子とその製造方法も含まれる。   Next, a procedure for crimping and connecting the terminal portion of the electric wire W to the crimp terminal 1 will be described. In this description, the terminal with an electric wire comprised by connecting the terminal part of the electric wire W to the crimp terminal 1 and its manufacturing method are also included.

この圧着端子1に電線Wの端末部を接続する場合には、下型(アンビル)の上に圧着端子1を載せて、圧着端子1の電線接続部5の内側に電線Wの端末部を挿入し、上型(クリンパ)を下型に対して相対的に下降させることで行う。   When connecting the terminal portion of the electric wire W to the crimp terminal 1, place the crimp terminal 1 on the lower mold (anvil) and insert the terminal portion of the electric wire W inside the electric wire connecting portion 5 of the crimp terminal 1. The upper die (crimper) is lowered relative to the lower die.

図3(a)〜(c)は、実施形態の圧着端子1の導体圧着部10を電線Wの導体Waに圧着する工程の説明図で、図3(a)は導体圧着部10の内側に導体Waを挿入して圧着を始めた初期の段階を示す断面図、図3(b)は一対の導体加締片12、12が内側に曲げられて導体Waに圧力がかかり始めた段階を示す断面図、図3(c)は圧着完了後の状態を示す断面図である。   3A to 3C are explanatory views of a process of crimping the conductor crimping portion 10 of the crimp terminal 1 of the embodiment to the conductor Wa of the electric wire W. FIG. 3A is inside the conductor crimping portion 10. FIG. 3B is a cross-sectional view showing an initial stage in which the conductor Wa is inserted and crimping is started, and FIG. 3B shows a stage in which the pair of conductor crimping pieces 12 and 12 are bent inward and pressure is applied to the conductor Wa. Sectional drawing and FIG.3 (c) are sectional drawings which show the state after crimping completion.

導体圧着部10を電線の導体Waに加締める場合は、まず、図3(a)に示すように、下型(アンビル)Nの載置面上に導体圧着部10の底板部11を載せて、導体圧着部10の内側に電線の端末部の導体Waを挿入する。この際、導体圧着部10の底板部11の幅方向両端部11a、11aは下型Nの載置面に隙間なく載るものの、凸壁部15の下側には載置面との間に凹所15cによる隙間Hができる。この隙間Hは、凸壁部15が下方に塑性変形する余裕として確保されている。   When crimping the conductor crimping portion 10 to the conductor Wa of the electric wire, first, as shown in FIG. 3A, the bottom plate portion 11 of the conductor crimping portion 10 is placed on the mounting surface of the lower mold (anvil) N. The conductor Wa at the end of the electric wire is inserted inside the conductor crimping portion 10. At this time, both end portions 11a and 11a in the width direction of the bottom plate portion 11 of the conductor crimping portion 10 are placed on the placement surface of the lower mold N without a gap, but are recessed between the placement surface and the lower side of the convex wall portion 15. A gap H is formed by the location 15c. The gap H is secured as a margin for the plastic wall portion 15 to be plastically deformed downward.

この状態で、上型(クリンパ)Mを下型Nに対して相対的に矢印Fのように下降させる。そうすると、上型Mの案内面Maが一対の導体加締片12、12の先端に接触し、案内面Maの働きで、一対の導体加締片12、12が徐々に内側に曲げられて行く。   In this state, the upper mold (crimper) M is lowered relative to the lower mold N as indicated by an arrow F. Then, the guide surface Ma of the upper mold M comes into contact with the tips of the pair of conductor crimping pieces 12 and 12, and the pair of conductor crimping pieces 12 and 12 are gradually bent inward by the action of the guide surface Ma. .

上型Mを続けて下降させると、一対の導体加締片12、12がさらに内側に曲げられて行き、導体加締片12、12の先端が導体Waに接触する。この段階までは、上型Mから加わる力は、主に導体加締片12の曲げに使われるため、導体Waにはほとんど作用しない。   When the upper mold M is continuously lowered, the pair of conductor crimping pieces 12 and 12 are further bent inward, and the tips of the conductor crimping pieces 12 and 12 come into contact with the conductor Wa. Until this stage, the force applied from the upper mold M is mainly used for bending the conductor crimping piece 12, and therefore hardly acts on the conductor Wa.

この段階から導体Waを圧縮する工程が進む。上型Mをさらに下降させて行くと、図3(b)に示すように、上型Mの案内面Maの中央の山形湾曲面の働きで、一対の導体加締片12、12の先端が互いに擦れ合いながら、導体Wa側に折り返すように丸められて行く。その過程で、一対の導体加締片12、12の先端から導体Waに圧縮力が加えられる。図中Sで囲んだ部分で導体Waに圧縮力が加えられる。   From this stage, the process of compressing the conductor Wa proceeds. When the upper mold M is further lowered, as shown in FIG. 3B, the tip of the pair of conductor crimping pieces 12 and 12 is moved by the action of the central curved surface of the guide surface Ma of the upper mold M. While being rubbed against each other, they are rounded so as to be folded back toward the conductor Wa. In the process, a compressive force is applied to the conductor Wa from the tips of the pair of conductor crimping pieces 12 and 12. A compressive force is applied to the conductor Wa at a portion surrounded by S in the figure.

このように、導体Waに圧縮力が加えられると、導体Waから底板部11の凸壁部15の上面に下向きの押圧力T1が作用する。凸壁部15の下側には、凹所15cによる隙間Hが確保されているので、凸壁部15は、この押圧力T1を受けることで、矢印T2のように下方に押し下げられる。このとき、図3(c)に示すように、段差部15a、15aが潰れながら、凸壁部15が、隙間Hの分だけ押し下げられて行く。   Thus, when a compressive force is applied to the conductor Wa, a downward pressing force T1 acts on the upper surface of the convex wall portion 15 of the bottom plate portion 11 from the conductor Wa. Since the clearance H by the recessed part 15c is ensured under the convex wall part 15, the convex wall part 15 is pushed down like arrow T2 by receiving this pressing force T1. At this time, as shown in FIG. 3C, the convex wall portion 15 is pushed down by the gap H while the step portions 15 a and 15 a are crushed.

最終的に、図3(c)に示すように、一対の導体加締片12、12の先端が、導体Wa側に折り返すように丸められて導体Waに食い込んで行く。良好な圧着性能を発揮できるC/Hにまで加工が進められる。その結果、導体Waを包むように導体加締片12、12が加締められて、導体Waが底板部11の上面に密着した状態になる。   Finally, as shown in FIG. 3C, the tips of the pair of conductor crimping pieces 12 and 12 are rounded so as to be folded back toward the conductor Wa and bite into the conductor Wa. Processing proceeds to C / H where good crimping performance can be exhibited. As a result, the conductor crimping pieces 12 and 12 are crimped so as to wrap the conductor Wa, and the conductor Wa is brought into close contact with the upper surface of the bottom plate portion 11.

この最終状態になる過程で、凸壁部15は下方に押し下げられて行き、その際の加締め圧力により段差部15aが潰れることで、底板部11の幅方向中央部に形成された凸壁部15が、底板部11の幅方向両端部11a、11aと同じ高さに平坦化される。この過程では、凸壁部15が導体Waの押圧力から逃げることになるので、凸壁部15に導体Waからの圧縮力が大きく作用はしない。従って、底板部11の肉厚Q1が他の部分と同等に保たれて薄肉化しない。   In the process of becoming the final state, the convex wall portion 15 is pushed downward, and the step portion 15a is crushed by the caulking pressure at that time, so that the convex wall portion formed in the center portion in the width direction of the bottom plate portion 11 15 is flattened to the same height as both end portions 11a and 11a in the width direction of the bottom plate portion 11. In this process, since the convex wall portion 15 escapes from the pressing force of the conductor Wa, the compressive force from the conductor Wa does not act on the convex wall portion 15 significantly. Therefore, the thickness Q1 of the bottom plate portion 11 is kept equal to the other portions and does not become thin.

図4は、導体圧着部10の圧着後の状態を示す拡大断面図である。
圧着の過程で、段差部15aが潰れながら凸壁部15が押し下げられて、凸壁部15のあった箇所が他の部位と同じ高さに平坦化する。その際、段差部15aの痕跡が、底板部11の内面(上面)10Aに細長い線状の凸部18Aとして残ると共に、底板部11の外面(下面)10Bに細長い線状の凹部18Bとして残る。
FIG. 4 is an enlarged cross-sectional view illustrating a state after the crimping of the conductor crimping portion 10.
In the process of crimping, the convex wall portion 15 is pushed down while the stepped portion 15a is crushed, and the portion where the convex wall portion 15 is located is flattened to the same height as other portions. At that time, traces of the stepped portion 15a remain as elongated linear protrusions 18A on the inner surface (upper surface) 10A of the bottom plate portion 11, and remain as elongated linear recesses 18B on the outer surface (lower surface) 10B of the bottom plate portion 11.

上記のように導体加締片12、12が加締められることによって、圧着端子1を構成する導電性金属と電線の導体とが凝着(分子や原子レベルで結合)することになる。その結果、圧着端子1と電線Wとが電気的および機械的に強く結合されることになる。   When the conductor crimping pieces 12 and 12 are crimped as described above, the conductive metal constituting the crimp terminal 1 and the conductor of the electric wire are adhered (bonded at a molecular or atomic level). As a result, the crimp terminal 1 and the electric wire W are strongly and electrically coupled.

以上の説明のように、実施形態の圧着端子1によれば、圧着時に導体Waから底板部11に加わる押圧力により段差部15a、15aが潰れながら凸壁部15が押し下げられる。そのため、段差部15a、15aが潰れることで、底板部11に作用する過剰な圧縮力を吸収することができ、底板部11の薄肉化を抑制することができる。   As described above, according to the crimp terminal 1 of the embodiment, the convex wall portion 15 is pushed down while the step portions 15a and 15a are crushed by the pressing force applied from the conductor Wa to the bottom plate portion 11 during crimping. Therefore, when the step portions 15a and 15a are crushed, an excessive compressive force acting on the bottom plate portion 11 can be absorbed, and thinning of the bottom plate portion 11 can be suppressed.

すなわち、圧着工程において、底板部11が下型(アンビル)Nの載置面に載った際に、底板部11の幅方向両端部11a、11aは載置面に隙間なく載るものの、凸壁部15の下側には載置面との間に隙間Hができる。従って、その隙間Hの分だけ凸壁部15が下方に塑性変形する余裕が確保される。段差部15a、15aが潰れるときには同時に凸壁部15が前記隙間Hの分だけ下方に押し下げられる。その押し下げられる過程では、凸壁部15が導体Waの押圧力から逃げることになるので、凸壁部15に導体Waからの圧縮力が大きく作用はしない。   That is, in the crimping process, when the bottom plate portion 11 is placed on the placement surface of the lower mold (anvil) N, the width direction both ends 11a and 11a of the bottom plate portion 11 are placed on the placement surface without any gap, but the convex wall portion. A gap H is formed below the mounting surface with respect to the placement surface. Accordingly, a margin for the plastic wall portion 15 to be plastically deformed downward is ensured by the gap H. When the step portions 15a and 15a are crushed, the convex wall portion 15 is simultaneously pushed downward by the gap H. In the process of being pushed down, the convex wall portion 15 escapes from the pressing force of the conductor Wa, so that the compressive force from the conductor Wa does not act on the convex wall portion 15 significantly.

従って、凸壁部15があることにより、導体Waから受ける大きな圧縮力を吸収できることになるので、底板部11の薄肉化を抑制できる。その結果、圧着部における電気性能の安定を図ることができる。   Therefore, since the large compressive force received from the conductor Wa can be absorbed by having the convex wall part 15, the thinning of the bottom plate part 11 can be suppressed. As a result, it is possible to stabilize the electrical performance in the crimping portion.

また、上記の圧着工程を経ることで得られる実施形態の電線付端子によれば、圧着時に段差部15a、15aが潰れることで凸壁部15が平坦化されているので、外観上は、凸壁部15や段差部15a、15aがあったように見えないものの、底板部11の薄肉化が抑制されている。   Further, according to the terminal with electric wire of the embodiment obtained through the above-described crimping step, the convex wall portion 15 is flattened by collapsing the stepped portions 15a and 15a at the time of crimping. Although the wall portion 15 and the step portions 15a and 15a do not appear to be present, the bottom plate portion 11 is prevented from being thinned.

また、実施形態の電線付端子の製造方法によれば、圧着工程において、底板部11を下型(アンビル)Nの載置面に載せた際に、凸壁部15の下側に、下方に塑性変形できる隙間Hを確保することができる。従って、段差部15a、15aが潰れるのに伴って凸壁部15を前記隙間Hの分だけ下方に押し下げることができる。その押し下げる過程では、凸壁部15が導体Waの押圧力から逃げることになるので、凸壁部15に導体Waからの圧縮力が大きく作用はしない。従って、凸壁部15があることにより、導体Waから受ける大きな圧縮力を吸収できることになるので、底板部11の薄肉化を抑制できる。その結果、圧着部における電気性能の安定を図ることができる。   Moreover, according to the manufacturing method of the terminal with an electric wire of the embodiment, when the bottom plate portion 11 is placed on the mounting surface of the lower mold (anvil) N in the crimping step, the lower side is below the convex wall portion 15. A gap H that can be plastically deformed can be secured. Therefore, as the stepped portions 15a and 15a are crushed, the convex wall portion 15 can be pushed downward by the gap H. In the process of pushing down, the convex wall portion 15 escapes from the pressing force of the conductor Wa, so that the compressive force from the conductor Wa does not act on the convex wall portion 15 significantly. Therefore, since the large compressive force received from the conductor Wa can be absorbed by having the convex wall part 15, the thinning of the bottom plate part 11 can be suppressed. As a result, it is possible to stabilize the electrical performance in the crimping portion.

なお、本発明は、上述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。その他、上述した実施形態における各構成要素の材質、形状、寸法、数、配置箇所、等は本発明を達成できるものであれば任意であり、限定されない。   In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

ここで、上述した本発明に係る圧着端子、電線付端子、およびその製造方法の実施形態の特徴をそれぞれ以下[1]〜[3]に簡潔に纏めて列記する。
[1] 電線(W)の端末部の露出した導体(Wa)に圧着接続される断面U字状の導体圧着部(10)が、
幅方向中央部に幅方向両端部(11a)よりも上方に一段盛り上がった凸壁部(15)を有すると共に、幅方向中央部の前記凸壁部(15)と幅方向両端部(11a)との境界に段差部(15a)を有し、上面に前記導体(Wa)が載置される底板部(11)と、
前記底板部(11)の幅方向両端部(11a)より幅方向外側に位置する幅方向両側縁からそれぞれ上方に延出し、前記導体(Wa)を包み込むように内側に曲げられることで、前記導体(Wa)を前記底板部(11)の上面に密着状態で加締める一対の導体加締片(12)と、
を備える、
ことを特徴とする圧着端子(1)。
[2] 上記[1]に記載の圧着端子(1)に電線(W)の端末部が接続された電線付端子であって、
前記底板部(11)の上面に前記電線(W)の端末部の露出した導体(Wa)が載置され、前記一対の導体加締片(12)が前記導体(Wa)を包み込むように内側に曲げられることで、前記導体(Wa)が前記底板部(11)の上面に密着状態で加締められており、加締め圧力により前記段差部(15a)が潰れることで、前記底板部(11)の幅方向中央部に形成された前記凸壁部(15)が、前記底板部(11)の幅方向両端部(11a)と同じ高さに平坦化されている、
ことを特徴とする電線付端子。
[3] 上記[1]に記載の圧着端子(1)に電線(W)を圧着接続することで電線付端子を製造する方法であって、
下型(N)の上に載せた前記圧着端子(1)の前記底板部(11)の上面に前記電線(W)の端末部の露出した導体(Wa)を載置し、その状態で、上型(M)を下型(N)に対して相対的に下降させることにより、上型(M)の案内面(Ma)によって、前記一対の導体加締片(12)を、前記導体(Wa)を包み込むように内側に曲げて、前記導体(Wa)を前記底板部(11)の上面に密着状態で加締め、その際の加締め圧力により前記段差部(15a)を潰すことで、前記底板部(11)の幅方向中央部に形成された前記凸壁部(15)を、前記底板部(11)の幅方向両端部(11a)と同じ高さに平坦化する、
ことを特徴とする電線付端子の製造方法。
Here, the features of the above-described embodiments of the crimp terminal, the terminal with electric wire, and the manufacturing method thereof according to the present invention are summarized and listed in the following [1] to [3], respectively.
[1] A conductor crimping portion (10) having a U-shaped cross section that is crimped and connected to the exposed conductor (Wa) of the terminal portion of the electric wire (W),
The convex wall portion (15) raised one step above the width direction both end portions (11a) at the width direction central portion, and the convex wall portion (15) and the width direction both end portions (11a) at the width direction center portion A bottom plate portion (11) having a step portion (15a) at the boundary thereof, on which the conductor (Wa) is placed,
By extending upward from both side edges in the width direction located on the outer side in the width direction from both ends (11a) in the width direction of the bottom plate portion (11), the conductor is bent inward so as to wrap around the conductor (Wa). A pair of conductor crimping pieces (12) for crimping (Wa) in close contact with the upper surface of the bottom plate portion (11);
Comprising
The crimp terminal (1) characterized by the above-mentioned.
[2] A terminal with electric wire in which a terminal portion of an electric wire (W) is connected to the crimp terminal (1) according to [1] above,
The exposed conductor (Wa) of the end portion of the electric wire (W) is placed on the upper surface of the bottom plate portion (11), and the pair of conductor crimping pieces (12) wraps inside the conductor (Wa). The conductor (Wa) is caulked in close contact with the upper surface of the bottom plate portion (11) by being bent, and the step portion (15a) is crushed by the caulking pressure, whereby the bottom plate portion (11 ), The convex wall portion (15) formed at the center in the width direction is flattened to the same height as both ends (11a) in the width direction of the bottom plate portion (11).
This is a terminal with electric wires.
[3] A method of manufacturing a terminal with electric wire by crimping and connecting an electric wire (W) to the crimp terminal (1) according to [1],
The exposed conductor (Wa) of the terminal portion of the electric wire (W) is placed on the upper surface of the bottom plate portion (11) of the crimp terminal (1) placed on the lower mold (N), and in this state, By lowering the upper mold (M) relative to the lower mold (N), the pair of conductor crimping pieces (12) is moved by the guide surface (Ma) of the upper mold (M) to the conductor ( Bending inward so as to wrap Wa), caulking the conductor (Wa) in close contact with the upper surface of the bottom plate part (11), and crushing the stepped part (15a) by the caulking pressure at that time, The convex wall portion (15) formed in the center portion in the width direction of the bottom plate portion (11) is flattened to the same height as both end portions (11a) in the width direction of the bottom plate portion (11).
The manufacturing method of the terminal with an electric wire characterized by the above-mentioned.

1 圧着端子
10 導体圧着部
11 底板部
11a 幅方向両端部
12 導体加締片
15 凸壁部
15a 段差部
M 上型
Ma 案内面
N 下型
W 電線
Wa 導体
DESCRIPTION OF SYMBOLS 1 Crimp terminal 10 Conductor crimping part 11 Bottom board part 11a Width direction both ends 12 Conductor crimping piece 15 Convex wall part 15a Step part M Upper mold | type Ma Guide surface N Lower mold | type W Electric wire Wa Conductor

Claims (3)

電線の端末部の露出した導体に圧着接続される断面U字状の導体圧着部が、
幅方向中央部に幅方向両端部よりも上方に一段盛り上がった凸壁部を有すると共に、幅方向中央部の前記凸壁部と幅方向両端部との境界に段差部を有し、上面に前記導体が載置される底板部と、
前記底板部の幅方向両端部より幅方向外側に位置する幅方向両側縁からそれぞれ上方に延出し、前記導体を包み込むように内側に曲げられることで、前記導体を前記底板部の上面に密着状態で加締める一対の導体加締片と、
を備える、
ことを特徴とする圧着端子。
A conductor crimping portion having a U-shaped cross section that is crimped and connected to the exposed conductor of the end portion of the electric wire,
It has a convex wall portion that is raised one step above both ends in the width direction at the center portion in the width direction, and has a step portion at the boundary between the convex wall portion in the center portion in the width direction and both end portions in the width direction. A bottom plate on which the conductor is placed;
The conductors are in close contact with the upper surface of the bottom plate part by extending upward from both side edges in the width direction located on the outer side in the width direction from both ends in the width direction of the bottom plate part and bending inward so as to wrap the conductor. A pair of conductor caulking pieces to be caulked with,
Comprising
Crimp terminal characterized by that.
請求項1に記載の圧着端子に電線の端末部が接続された電線付端子であって、
前記底板部の上面に前記電線の端末部の露出した導体が載置され、前記一対の導体加締片が前記導体を包み込むように内側に曲げられることで、前記導体が前記底板部の上面に密着状態で加締められており、加締め圧力により前記段差部が潰れることで、前記底板部の幅方向中央部に形成された前記凸壁部が、前記底板部の幅方向両端部と同じ高さに平坦化されている、
ことを特徴とする電線付端子。
A terminal with an electric wire in which a terminal portion of an electric wire is connected to the crimp terminal according to claim 1,
The exposed conductor of the end portion of the electric wire is placed on the upper surface of the bottom plate portion, and the pair of conductor crimping pieces are bent inward so as to wrap the conductor, so that the conductor is placed on the upper surface of the bottom plate portion. The convex wall portions formed at the center in the width direction of the bottom plate portion have the same height as both end portions in the width direction of the bottom plate portion. Flattened,
This is a terminal with electric wires.
請求項1に記載の圧着端子に電線を圧着接続することで電線付端子を製造する方法であって、
下型の上に載せた前記圧着端子の前記底板部の上面に前記電線の端末部の露出した導体を載置し、その状態で、上型を下型に対して相対的に下降させることにより、上型の案内面によって、前記一対の導体加締片を、前記導体を包み込むように内側に曲げて、前記導体を前記底板部の上面に密着状態で加締め、その際の加締め圧力により前記段差部を潰すことで、前記底板部の幅方向中央部に形成された前記凸壁部を、前記底板部の幅方向両端部と同じ高さに平坦化する、
ことを特徴とする電線付端子の製造方法。
A method of manufacturing a terminal with electric wire by crimping and connecting an electric wire to the crimp terminal according to claim 1,
By placing the exposed conductor of the terminal portion of the electric wire on the upper surface of the bottom plate portion of the crimp terminal placed on the lower die, and lowering the upper die relative to the lower die in this state The pair of conductor crimping pieces are bent inward so as to wrap the conductor by the upper guide surface, and the conductor is crimped in close contact with the upper surface of the bottom plate portion, and the crimping pressure at that time By flattening the stepped portion, the convex wall portion formed in the center portion in the width direction of the bottom plate portion is flattened to the same height as both end portions in the width direction of the bottom plate portion.
The manufacturing method of the terminal with an electric wire characterized by the above-mentioned.
JP2017180344A 2017-09-20 2017-09-20 Crimp terminal, terminal with electric wire, and manufacturing method of the same Abandoned JP2019057392A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021163727A (en) * 2020-04-03 2021-10-11 古河電気工業株式会社 Crimping unit, joint terminal, joint structure, manufacturing method of crimping unit, and manufacturing method of joint terminal

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JP2009123621A (en) * 2007-11-16 2009-06-04 Yazaki Corp Crimping terminal for aluminum wire
JP2010040361A (en) * 2008-08-06 2010-02-18 Sumitomo Wiring Syst Ltd Terminal fitting and wire harness
JP2010080189A (en) * 2008-09-25 2010-04-08 Sumitomo Wiring Syst Ltd Terminal fitting and electric wire with terminal fitting
JP2010103012A (en) * 2008-10-24 2010-05-06 Yazaki Corp Crimping terminal for aluminum wire and method for manufacturing crimping terminal for aluminum wire

Patent Citations (4)

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JP2009123621A (en) * 2007-11-16 2009-06-04 Yazaki Corp Crimping terminal for aluminum wire
JP2010040361A (en) * 2008-08-06 2010-02-18 Sumitomo Wiring Syst Ltd Terminal fitting and wire harness
JP2010080189A (en) * 2008-09-25 2010-04-08 Sumitomo Wiring Syst Ltd Terminal fitting and electric wire with terminal fitting
JP2010103012A (en) * 2008-10-24 2010-05-06 Yazaki Corp Crimping terminal for aluminum wire and method for manufacturing crimping terminal for aluminum wire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021163727A (en) * 2020-04-03 2021-10-11 古河電気工業株式会社 Crimping unit, joint terminal, joint structure, manufacturing method of crimping unit, and manufacturing method of joint terminal
JP7470563B2 (en) 2020-04-03 2024-04-18 古河電気工業株式会社 Crimping portion, joint terminal, joint structure, method of manufacturing crimping portion, and method of manufacturing joint terminal

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