JPH11329523A5

JPH11329523A5 -

Info

Publication number: JPH11329523A5
Application number: JP1998135757A
Authority: JP
Filing date: 1998-05-18
Publication date: 2005-10-06
Anticipated expiration: 2018-05-18

Description

（ｂ）において、芯線１１０がより線である場合に、（ａ）で示した脚片部１０３からある距離を隔てた脚片部１０４では、素線１１１が脚片部１０４にも接触しない場合がある。
このように、両方の脚片部１０３，１０４のどちらにも接触しないときには、導通するための芯線１１０の断面積が減少し、金属爪要素１００（図７参照）と芯線１１０との接触抵抗が増加するという不都合がある。 In (b), when the core wire 110 is a stranded wire, the wire 111 may not even come into contact with the leg piece 104 at a certain distance from the leg piece 103 shown in (a).
In this way, when neither of the leg portions 103, 104 is in contact, the cross-sectional area of the core wire 110 for electrical conduction is reduced, which disadvantageously increases the contact resistance between the metal claw element 100 (see Figure 7) and the core wire 110 .

【０００７】
【課題を解決するための手段】
上記目的を達成するために本発明の請求項１は、複数本の素線を撚り合せてなる導体を絶縁被覆で覆った電線に、導体の外径より狭い間隔の２列の刃部を備えた一対の対向するフォーク板を押し当てて、刃部で絶縁被覆をカットするとともに刃部を素線に接触させることで導体とフォーク板とを導通する圧接形コネクタにおいて、圧接形コネクタのフォーク板を互いに平行で且つ間隔を次に示すｔに設定した。 [0007]
[Means for solving the problem]
In order to achieve the above object, claim 1 of the present invention provides an insulation displacement connector in which a pair of opposing fork plates having two rows of blades spaced apart narrower than the outer diameter of the conductor are pressed against an electric wire having a conductor made of multiple stranded wires covered with an insulating coating, cutting the insulating coating with the blades and bringing the blades into contact with the wires, thereby establishing electrical continuity between the conductor and the fork plates, the fork plates of the insulation displacement connector being parallel to each other and spaced apart at t as shown below.

図２は図１の２矢視図でり、第１圧接部２のスロット部７は、開口側から順に、電線Ｃ１をガイドするための第１傾斜部７ａ，７ａと、絶縁被覆Ｅ１を剥がすためのエッジ部７ｂ，７ｂと、導体Ｄ１の素線を圧縮及び再配列させる第２傾斜部７ｃ，７ｃと、エッジ部７ｂ，７ｂの被覆剥離の効果を高めるために第１傾斜部７ａ，７ａ及び第２傾斜部７ｃ，７ｃの外側面に形成した面取り部７ｄ，７ｄと、導体Ｄ１に押し付けて圧接保持するための左・右刃部７Ｌ，７Ｒと、スロット部７に電線Ｃ１を押し込んだときに応力の集中を防ぐアール部７ｆとからなる。 2 is a view seen from the arrow 2 in FIG. 1, and the slot portion 7 of the first insulation displacement portion 2 comprises, in order from the opening side, first inclined portions 7a, 7a for guiding the electric wire C1, edge portions 7b, 7b for stripping the insulating coating E1, second inclined portions 7c, 7c for compressing and rearranging the wires of the conductor D1, chamfered portions 7d, 7d formed on the outer surfaces of the first inclined portions 7a, 7a and the second inclined portions 7c, 7c in order to enhance the effect of stripping the coating of the edge portions 7b, 7b, left and right blade portions 7L, 7R for pressing against the conductor D1 to hold it in pressure contact, and a rounded portion 7f for preventing stress concentration when the electric wire C1 is pressed into the slot portion 7.

従って、素線Ｐ，Ｑの両方が刃部８Ｌに接触するためには、素線Ｐは、位置Ｓを位置Ｔから２θだけ時計回りの位置とすれば、位置Ｒから位置Ｓの間にあればよい。即ち、素線Ｐが範囲Ｘで接触すればよい。
これより、上記した素線Ｐ，Ｑが左刃部８Ｌに接触する条件は、導体Ｄ１の第１圧接部２から第２圧接部３に至る撚り角度をφ_１とすると、
２θ≦φ_１＜π−２θ……（１） Therefore, in order for both wires P and Q to contact the blade portion 8L, the wire P should be between positions R and S, assuming that position S is a position 2θ clockwise from position T. In other words, the wire P should be in contact within range X.
Therefore, the condition under which the wires P and Q come into contact with the left blade portion 8L is, when the twist angle from the first insulation displacement portion 2 to the second insulation displacement portion 3 of the conductor D1 is _φ1 ,
2θ≦φ ₁ <π−2θ……(1)

また、素線Ｐ，Ｑの両方が刃部８Ｒに接触するためには、上記と同様にして、素線Ｐは、位置Ｖを位置Ｗから２θだけ時計回りの位置とすれば、位置Ｕから位置Ｖの間にあればよい。即ち、素線Ｐが範囲Ｙで接触すればよい。
従って、上記した素線Ｐ，Ｑが右刃部８Ｒに接触する条件は、導体Ｄ１の第１圧接部２から第２圧接部３に至る撚り角度をφ_２とすると、
π＋２θ≦φ_２＜２π−２θ……（２） In addition, in order for both wires P and Q to come into contact with the blade portion 8R, similarly to the above, the wire P should be between positions U and V, with position V being a position 2θ clockwise from position W. In other words, the wire P should be in contact within range Y.
Therefore, the condition under which the wires P and Q come into contact with the right blade portion 8R is, when the twist angle from the first insulation displacement portion 2 to the second insulation displacement portion 3 of the conductor D1 is _φ2 ,
π+2θ≦φ ₂ <2π−2θ……(2)

ここで、
Ｍ＝θ／π
とすると、（５）式は、
Ｍ・ｐ≦ｔ＜（０．５−Ｍ）・ｐ……（８）
また、（６）式は、
（０．５＋Ｍ）・ｐ≦ｔ＜（１−Ｍ）・ｐ……（９）
上記した（８）式又は（９）式が、導体Ｄ１の複数の素線Ｐ，Ｑ（及び残りの素線）を第１・第２圧接部２，３のどちらか一方に接触するための条件である。 where:
M = θ/π
Then, equation (5) becomes:
M・p≦t<(0.5−M)・p……(8)
Furthermore, equation (6) is
(0.5+M)・p≦t<(1−M)・p……(9)
The above-mentioned formula (8) or (9) is the condition for contacting the plurality of wires P, Q (and the remaining wires) of the conductor D1 with either the first or second insulation displacement portion 2, 3.

図５は本発明に係る圧接形コネクタのＷＳ／ｄと素線切れ本数との関係を示すグラフであり、縦軸は導体の素線切れ本数、横軸は導体径に対する刃部間隔の比率であるＷＳ／ｄを表す。（符号は図１及び図４参照。）
ＷＳ／ｄが小さい、即ち導体Ｄ１（又は導体Ｄ２）の外径ｄに対して左・右刃部７Ｌ，７Ｒ（又は左・右刃部８Ｌ，８Ｒ）間の間隔ＷＳが小さいと、導体Ｄ１（又は導体Ｄ２）を左・右刃部７Ｌ，７Ｒ（又は左・右刃部８Ｌ，８Ｒ）間に無理に押し込むことになり、素線切れ本数が多くなる。 Figure 5 is a graph showing the relationship between WS/d and the number of broken wires in the insulation displacement connector of the present invention, with the vertical axis representing the number of broken conductor wires and the horizontal axis representing WS/d, which is the ratio of the blade spacing to the conductor diameter (see Figures 1 and 4 for the symbols).
If WS/d is small, that is, if the spacing WS between the left and right blade portions 7L, 7R (or the left and right blade portions 8L, 8R) is small relative to the outer diameter d of the conductor D1 (or conductor D2), the conductor D1 (or conductor D2) will be forcibly pushed between the left and right blade portions 7L, 7R (or the left and right blade portions 8L, 8R), resulting in an increased number of broken wires.

ＷＳ／ｄを大きくする、即ち導体Ｄ１（又は導体Ｄ２）の外径ｄに対して左・右刃部７Ｌ，７Ｒ（又は左・右刃部８Ｌ，８Ｒ）間の間隔ＷＳを大きくするにつれて導体Ｄ１が左・右刃部７Ｌ，７Ｒ（又は左・右刃部８Ｌ，８Ｒ）間に比較的容易に入り込むようになって、素線切れ本数が少なくなり、ＷＳ／ｄの値が０．４以上では、素線切れはなくなる。 As WS/d is increased, i.e., as the spacing WS between the left and right blade portions 7L, 7R (or the left and right blade portions 8L, 8R) is increased relative to the outer diameter d of the conductor D1 (or conductor D2), the conductor D1 can enter between the left and right blade portions 7L, 7R (or the left and right blade portions 8L, 8R) relatively easily, reducing the number of broken wires. When the value of WS/d is 0.4 or greater, there are no broken wires.

Claims

This is an insulation displacement connector that presses a pair of opposing fork plates with two rows of blades spaced apart narrower than the outer diameter of the conductor against an electric wire having a conductor made of multiple twisted wires covered with an insulating coating, cutting the insulating coating with the blades and bringing the blades into contact with the wires, thereby establishing electrical continuity between the conductor and the fork plates. This insulation displacement connector is characterized in that the fork plates are parallel to each other and are spaced apart at a distance t as shown below.