JP4030777B2 - Connection clamp device - Google Patents

Description

上記表１からより線Ａの軸線と１．９°の角度で交差するように接触刃２,１６を配置することにより、素線ａを深く傷付けるおそれがないことが判明した。
【００１９】
また、接触刃２,１６のそれぞれの３つの頂部２ａ,２ｂ,２ｃ,１６ａ,１６ｂ,１６ｃを６０°に形成したのは、次の理由による。
すなわち、より線の絶縁被覆への食い込み性のみを考えるならば、４５°、３０°等の小さい角度に設定することが好ましい。しかし、角度が小さくなれば、耐久性が劣る。絶縁被覆ヘの食い込み性と耐久性の両方を満足させるためには本実施例のように６０°にすることが好ましく、このようにすることにより、上述の如く３つの頂部２ａ、２ｂ、２ｃ,１６ａ,１６ｂ,１６ｃ全てを刃として使用することができる。また、接触刃２,１６は、材質が導電性の優れた銅合金、好ましくはべリリウム銅であり、例えば、ＪＩＳＨ３２７０に規定する種類Ｃ１７２０を焼き入れ、焼き戻しの時効硬化処理を行って製造される。接触刃２,１６は、全長が例えば３０mmで、その長手方向がより線の軸線と１°乃至６°で交差するように可動接触台３に着脱自在に取り付けられる。接触刃２の３つの面にはそれぞれネジ孔２ｄ(図３参照)が設けられ、可動接触台３に該ネジ孔２ｄに螺合するネジ(図示せず)を取り付けることにより、接触刃２が可動接触台３に対して着脱自在に取り付けられる。頂部２ａ,２ｂ,２ｃのいずれかが摩耗したり、欠けたり等した場合には、一旦接触刃２を可動接触台３から外し、別の頂部２ａ,２ｂ,２ｃを凹溝５ａ,５ｂと対向させ、接触刃２を再度可動接触台３に固定する。接触刃１６についても同様に、その３つの面にそれぞれネジ孔(図示せず)が設けられ、電線保持部４に該ネジ孔に螺合するネジ(図示せず)を取り付けることにより、接触刃１６が電線保持部４に対して着脱自在に取り付けられる。頂部１６ａ,１６ｂ,１６ｃのいずれかが摩耗したり、欠けたり等した場合には、一旦接触刃１６を電線保持部４から外し、別の頂部１６ａ,１６ｂ,１６ｃを接触刃２と対向させ、接触刃１６を再度電線保持部４に固定する。
【００２０】
電線保持部４は、クランプ本体１と一体の電線保持本体４ａと、クランプ本体１の上部にピン６を介して回動可能に取付けられた電線保持板７とからなる。電線保持本体４ａには大径より線の直径と略等しい径の半円部分を有する略逆Ｕ字状の凹溝５ａが設られ、電線保持板７には細径電線の直径と略等しい径の半円部分を有する略逆Ｕ字状の凹溝５ｂが設けられる。これら凹溝５ａ,５ｂは、それぞれその内周面が大径のより線、細径のより線の外周面と密着、すなわち圧着状態で面接触してこれらより線を動かないようにしっかり保持する。
【００２１】
電線保持板７の位置決めは、クランプ本体１の上部にピン６の近くに突設した位置決めピン８と電線保持板７に設けた２つの係止孔９ａ,９ｂとの係止によって行う。２つの係止孔９ａ,９ｂは、それぞれその一端で開口する。電線保持板７を、係止孔９ａが位置決めピン８に係止する図１に示す位置に配置した場合、凹溝５ｂが細径のより線の外周面と密着する状態にすることができる。電線保持板７を、係止孔９ａが位置決めピン８に係止する図１に示す位置からピン６を支点として図１の時計方向に回転させると、位置決めピン８と係止孔９ａとの係止が外れる。電線保持板７を更に図１の時計方向に回転させると、係止孔９ｂが位置決めピン８に係止し、図示しないが電線保持板７が電線保持部４から外れて凹溝５ａを露呈させ、凹溝５ａが大径のより線の外周面と密着する状態となる。
【００２２】
クランプ本体１には、その上部一端から斜め下方に延長した端子取付部１１が一体に設けられ、該端子取付部１１にリード線(図示せず)が接続され、バイパス線や接地線が引き出される。
【００２３】
可動接触台３には、その底部にクランプ本体１の下端基部１２に螺合したネジ軸１３の頭部が回転可能に接続される。また、可動接触台３の一端部には、クランプ本体１の垂直にのびた中間部分に上下方向にスライド可能に係合する係合部１４が一体に設けられる。ネジ軸１３の回転により可動接触台３が回転することなくクランプ本体１の上下方向に移動し、接触刃２を凹溝５ａ,５ｂ側に接近あるいは凹溝５ａ,５ｂ側から離すことが出来る。
【００２４】
ネジ軸１３の下端には、ノブ１５が固定され、このノブ１５をトルクリミッターを装備した治具(図示せず)を介して絶縁操作棒(図示せず)に連結する。
次に本実施例の接続クランプ装置をより線Ａに取り付ける場合を説明する。
【００２５】
大径のより線の場合、係止孔９ｂを位置決めピン８に係止させて電線保持板７を凹溝 ５Ａ上から逃がしておき、また細径より線の場合、図１に示すように係止孔９ａを位置決めピン８に係止させて電線保持板７を凹溝５ａ上に重ね合わさるように回転移動させる。次いで、絶縁操作棒の先端に取り付けた治具にノブ１５をセットし、接続クランプ装置をより線Ａの所に持ち上げ、凹溝５ａまたは５ｂに該より線Ａが恢合するように引っ掛ける。この後、ノブ１５(ネジ軸１３)を回転操作して可動接触台３を上昇させ、接触刃２をより線Ａの絶縁被覆に貫通させて導体と接触させる。これにより、端子取付部１１に接続したリード線に電流が流れ、バイパス線、接地線を取ることが出来る。
【００２６】
このとき、治具のトルクリミッターによりノブ１５、ネジ軸１３に１４７０Ｎ・ｃｍ（１５０ｋｇｆ・ｃｍ）〜１９６０Ｎ・ｃｍ（２００ｋｇｆ・ｃｍ）の締付トルクが作用した状態でより線Ａが凹溝５ａあるいは５ｂと接触刃２,１６との間に扶持される。また、接触刃２,１６の切刃の長手方向の略全域がより線Ａ(素線ａ)と接触して、接触刃２,１６の切刃の長手方向の一部分がより線Ａ(素線ａ)に圧着して傷つけるおそれはない。
【００２７】
本実施例の場合、凹溝５ａ、５ｂをそれぞれ大小のより線Ａの径に対応させてより線径に略等しくなるように形成してあるため、より線Ａに大電流(１０ｋＡ〜１２.５ｋＡ)が急激に流れたとしても、凹溝５ａ、５ｂ内でより線Ａは殆ど動かず、より線Ａが溶断したり、接続クランプが破損したりするおそれはない。また、より線Ａを構成する素線Ａを傷付けることなく接触刃２,１６を確実に接触させることができ、より線Ａの導体との接触面積が増加する上に、より線Ａの絶縁被覆と電線保持部４との間の接触圧力が余り大きくならないので、すなわち電線保持部４から絶縁被覆に大きな圧力が作用しないので、長期間の使用においても絶縁被覆がクリープ現象によって"へたる"ことがなく、接触面積、接触圧力が低下せず、接触抵抗が大きくならず、安定する。
【００２８】
なお、上記実施例では接触刃２,１６を設けた場合を示したが、図７,図８に示すように、接触刃２のみでもよく、また電線保持板７に凹溝５ｂを１つ設けた場合を示したが、電線径に合わせて複数の凹溝を設けるようにしてもよい。また、電線保持板７を設けないタイプの接続クランプ装置にも本発明を適用することが可能である。
【００２９】
【発明の効果】
以上説明したように、本発明の接続クランプ装置は、接触刃を、より線を構成する素線間に刃先部分が食い込まないように、より線の軸線と１°乃至６°の僅かな角度で交差するように配置してなるので、より線の素線を傷つけることなく、接触刃とより線との間で十分な接触圧が確保でき、またより線の直径に合わせて接触刃を交換しなくても済む等の効果を奏することができる。
【００３０】
また、クランプ本体上部のより線保持部を、より線径毎に略電線径に等しい大きさの溝とした場合、溝と電線とは面接触し、大電流が流れても接触刃とより線の導体との間の接触面積を確保し、導線への把持力、締付トルクを管理することで一定した接触圧が得られ、しいては接触抵抗が小さく、ジュール熱の発生を低く押さえられ、また大電流が流れる際の衝撃力のための振動が加わっても接触面積、接触圧力に変化を与えない。
【図面の簡単な説明】
【図１】本発明の接続クランプ装置の一実施例を示す側面図である。
【図２】同正面図である。
【図３】接触刃の拡大斜視図である。
【図４】接触刃の平面図である。
【図５】より線と接触刃との関係を説明する平面図である。
【図６】図５のＶＩ―ＶＩ線に沿う説明断面図である。
【図７】より線と接触刃との関係を説明する別の平面図である。
【図８】図７のＶＩＩＩ―ＶＩＩＩ線に沿う説明断面図である。
【符号の説明】
１クランプ本体
２,１６ 接触刃
２ａ,２ｂ,２ｃ、１６ａ,１６ｂ,１６ｃ 頂部
３ 可動接触台
４ 電線保持部
４ａ 線保持本体
５ａ,５ｂ 凹溝
６ ピン
７ 電線保持板
８ 位置決めピン
９ 係止孔
１１ 端子取付部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection clamp device that is used when a bypass line and a ground line are drawn out from an aerial distribution line in a live line state, and more particularly to a connection clamp device that includes a contact blade that penetrates a wire coating.
[0002]
[Problems to be solved by the invention]
When pulling out a bypass line and a ground line from an aerial distribution line or the like, conventionally, a method has been employed in which the insulation coating of the electric wire is stripped to a predetermined length and the exposed conductor is directly clamped with a connection clamp. However, this stripping operation is time-consuming, and in order to save this, in recent years, a connection clamp having a contact blade penetrating the insulating coating has been used.
[0003]
This type of connection clamp is required not to cause troubles such as fusing of the distribution line and breakage of the connection clamp during energization of an overcurrent (10 kA to 12.5 kA). This is because when large current flows, due to reasons such as low conductivity, small contact area, low contact pressure, etc., when contact resistance increases, large Joule heat is generated, so the distribution line is blown, This is because the connection clamp may be damaged.
[0004]
Moreover, it is requested | required that the contact blade which penetrated the electric wire covering may not damage a strand. For example, a stranded wire is used as an electric wire through which a large amount of current flows. In this case, when the contact blade contacts in a parallel state along the axial direction of the stranded wire, the central portion in the length direction of the contact blade is adjacent. On the other hand, both ends of the contact blade in the length direction may be located on two adjacent strands while being located on the boundary between the strands. In such a case, the clamping force (clamping force) acting on the stranded wire from the contact blade does not act uniformly over the entire length of the contact blade, and the adjacent strands are kinked due to the clamping force. Thus, the central portion of the contact blade breaks into the boundary between the strands and becomes smaller at the central portion, but becomes larger at both ends, and as a result, the strands may be damaged at both ends.
[0005]
As a device for preventing the contact blade penetrating the wire coating from damaging the strands, for example, it is known to arrange the contact blades so as to be parallel to the direction of the strands of the strands. 58-33645).
[0006]
In this case, the edge of the contact blade must be formed in an arc shape in accordance with the outer peripheral shape of the strand, the contact blade must be replaced according to the diameter of the strand, and the contact blade is between the strands. When the boundary is interrupted, there is a disadvantage that the contact pressure between the contact blade and the stranded wire is small, which causes the contact resistance to increase.
[0007]
It is also known that the contact blades are arranged so as to intersect at an angle of 30 ° or more with respect to the direction of the strands of the strands (see Japanese Utility Model Publication No. 58-29566).
In this case, there is no possibility that the contact blade will break into the boundary between the strands, but the contact between the blade edge of the contact blade and the strand is limited to almost one point. It is necessary to form in an arc shape so as to match the shape of the cut surface when the strand is cut at the place where the wire contacts, and the blade edge needs to be in contact with the strand. For this reason, the contact blade according to the diameter of the strand Have the disadvantage of having to be replaced.
[0008]
The present invention minimizes scratches on the stranded wire, can ensure a sufficient contact pressure between the contact blade and the stranded wire, and does not need to replace the contact blade in accordance with the diameter of the stranded wire. It is an object to provide a connection clamping device.
[0009]
[Means for Solving the Problems]
The present invention that achieves the above object is a connection clamp device provided with a contact blade that penetrates the insulation coating of a stranded wire, wherein the contact blade is made of a strand that constitutes the stranded wire with respect to the strand axis. It is arranged so as to be inclined at an angle of 1 ° to 6 ° (3.8 to 5.7 °) in a direction opposite to the angle.
DETAILED DESCRIPTION OF THE INVENTION
1 is a side view showing an embodiment of the connection clamping device of the present invention, FIG. 2 is a front view thereof, FIG. 3 is an enlarged perspective view of a contact blade, FIG. 4 is a plan view of the contact blade, and FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5, FIG. 7 is another plan view for explaining the relationship between the stranded wire and the contact blade, and FIG. 7 is an explanatory sectional view taken along line VIII-VIII in FIG.
[0011]
The present embodiment shown in FIGS. 1 to 4 is a connection clamp device of a type corresponding to two types of stranded wires, a thick stranded wire and a thin stranded wire, of the clamp body 1 configured in a substantially C shape. A movable contact base 3 equipped with a contact blade 2 penetrating the stranded insulation coating S is arranged below, and an electric wire holding part 4 is arranged above the clamp body 1, and contacts the electric wire holding part 4. The contact blade 16 is disposed so as to face the blade 2.
[0012]
Each of the contact blades 2 and 16 has a triangular prism shape having a regular triangular cross section, and all of the three top portions 2a, 2b, 2c, 16a, 16b, and 16c are cutting blades that penetrate the insulating coating S of the electric wire. ing. The contact blade 2 has a top edge 2a, 2b, 2c of any of the three top portions 2a, 2b, 2c as a cutting edge. As shown in FIGS. Is movable so as to intersect the axis of the stranded wire A at an angle of 1 ° to 6 °, preferably 1.9 ° to 5.7 °, so that the top of the wire A does not bite between the strands A constituting the stranded wire A Arranged on the contact table 3. That is, the contact blade 2 is arranged on the movable contact base 3 so that the cutting blade is not parallel to the axis of the twisted line A but is almost along the axis of the twisted line A, but slightly intersects. (See dotted line in FIG. 5). The twist angle of the strand wire a of the strand A (the twist angle of the strand wire a with respect to the axial direction of the strand A) is about 10 ° in the direction opposite to the contact blade. Similarly, for the contact blade 16, the wire holding portion 4 is so formed that it intersects the axis of the strand A at an angle of 1 ° to 6 ° so that the top portion which is the blade tip portion does not bite between the strands a constituting the strand A. (See the solid line in FIG. 5).
[0013]
The cutting edge is arranged so as to intersect the axis of the stranded wire A at an angle of 1 ° to 6 ° so that the cutting edge portion (top) does not bite between the strands a constituting the stranded wire A. Depending on the reason.
[0014]
When the cutting blade is largely intersected with the direction of the strand a constituting the strand A, the contact area between the cutting blade and the strand is not very small. It is necessary to form in an arc shape so as to match the cross-sectional shape (cross-sectional shape when the strand is cut at the point where the cutting blades intersect). This is because the need to replace the blade arises.
[0015]
If the cutting edge is not parallel to the axis of the A, but intersects the axis of the twisted line A at a slight angle of 1 ° to 6 °, even if the cutting edge is formed in a straight line, An arc shape so as to match the cross-sectional shape of the stranded wire A (cross-sectional shape when the stranded wire is cut at the point where the cutting blades intersect), in contact with the stranded wire over almost the entire length of the cutting blade It is not necessary to replace the cutting blade with the outer diameter of the stranded wire A.
[0016]
When intersecting at an angle smaller than 1 °, when the contact blade is pressed against the stranded wire, the strand is twisted and the cutting blade is arranged in the same way as when the cutting blade is arranged parallel to the axial direction of the stranded wire. There is a risk that the portion will bite into the wire a. In addition, when intersecting at an angle larger than 6 °, when the cutting blade is formed in a straight line, only a part of the cutting blade comes into contact with the stranded wire. Needs to be formed in an arc shape so as to match the cross-sectional shape of the stranded wire A.
[0017]
Table 1 below shows the relationship between the angle of intersection between the contact blades 2 and 16 and the axis of the twisted line A and the degree of scratches on the element wire a.
OCI 80 mm ² and strand diameter 2.3φ were used as the stranded wires. The angle of the strands constituting the strands was 10 °. A contact blade having a blade length of 30 mm was used. With a tightening torque of 1770 N · cm (180 kgf · cm), the dimension d (see FIG. 4) of 10 strands is 0.5 mm (1.9 °), 1.0 mm (3.8 °), The degree of scratches was examined for each of 1.5 mm (5.7 °).
here,
Δ: Scratches with a depth of 2/3 of the diameter of the wire ○: Scratches with a depth of 1/3 of the diameter of the wire ◎: Scratches with a diameter of 0.3 mm or less.
[0018]
[Table 1]

From Table 1 above, it was found that there is no possibility of deeply damaging the element wire a by arranging the contact blades 2 and 16 so as to intersect with the axis of the line A at an angle of 1.9 °.
[0019]
Moreover, the reason why the three top portions 2a, 2b, 2c, 16a, 16b, and 16c of the contact blades 2 and 16 are formed at 60 ° is as follows.
That is, if only the penetration property of the stranded wire into the insulation coating is considered, it is preferable to set the angle to a small angle such as 45 ° or 30 °. However, if the angle is small, the durability is poor. In order to satisfy both the penetration and durability into the insulation coating, it is preferable to set the angle to 60 ° as in this embodiment, and by doing so, as described above, the three top portions 2a, 2b, 2c, All of 16a, 16b, and 16c can be used as blades. The contact blades 2 and 16 are made of a copper alloy having excellent conductivity, preferably beryllium copper. For example, the contact blades 2 and 16 are manufactured by quenching type C1720 specified in JISH3270 and performing age hardening treatment of tempering. The The contact blades 2 and 16 have a total length of, for example, 30 mm, and are detachably attached to the movable contact base 3 so that the longitudinal direction thereof intersects the stranded axis at 1 ° to 6 °. Screw holes 2d (see FIG. 3) are respectively provided on the three surfaces of the contact blade 2. By attaching a screw (not shown) to be screwed into the screw hole 2d to the movable contact base 3, the contact blade 2 can be attached. The movable contact base 3 is detachably attached. When any of the tops 2a, 2b, 2c is worn or chipped, the contact blade 2 is once removed from the movable contact base 3, and the other tops 2a, 2b, 2c are opposed to the grooves 5a, 5b. Then, the contact blade 2 is fixed to the movable contact base 3 again. Similarly, the contact blade 16 is also provided with screw holes (not shown) on the three surfaces thereof, and a screw (not shown) that is screwed into the screw hole is attached to the electric wire holding portion 4. 16 is detachably attached to the electric wire holding part 4. When any of the top portions 16a, 16b, 16c is worn or chipped, the contact blade 16 is once removed from the wire holding portion 4, and the other top portions 16a, 16b, 16c are opposed to the contact blade 2, The contact blade 16 is fixed to the electric wire holding part 4 again.
[0020]
The electric wire holding portion 4 includes an electric wire holding main body 4 a integrated with the clamp main body 1 and an electric wire holding plate 7 that is rotatably attached to the upper portion of the clamp main body 1 via a pin 6. The electric wire holding body 4a is provided with a substantially inverted U-shaped groove 5a having a semicircular portion having a diameter substantially equal to the diameter of the wire, and the electric wire holding plate 7 has a diameter substantially equal to the diameter of the thin electric wire. A substantially inverted U-shaped groove 5b having a semicircular portion is provided. The concave grooves 5a and 5b are firmly held so that the inner peripheral surfaces thereof are in close contact with the outer peripheral surfaces of the large-diameter strands and the thin-diameter strands, that is, in contact with each other in a crimped state so that the strands do not move. .
[0021]
The electric wire holding plate 7 is positioned by locking the positioning pin 8 projecting near the pin 6 on the upper part of the clamp body 1 and the two locking holes 9a and 9b provided in the electric wire holding plate 7. Each of the two locking holes 9a and 9b opens at one end thereof. When the electric wire holding plate 7 is arranged at the position shown in FIG. 1 where the locking hole 9a is locked to the positioning pin 8, the concave groove 5b can be brought into close contact with the outer peripheral surface of the thin stranded wire. When the wire holding plate 7 is rotated in the clockwise direction of FIG. 1 from the position shown in FIG. 1 where the locking hole 9a is locked to the positioning pin 8, the engagement between the positioning pin 8 and the locking hole 9a. Stop. When the wire holding plate 7 is further rotated in the clockwise direction in FIG. 1, the locking hole 9b is locked to the positioning pin 8, and although not shown, the wire holding plate 7 is detached from the wire holding portion 4 to expose the concave groove 5a. The concave groove 5a is brought into close contact with the outer peripheral surface of the large-diameter strand.
[0022]
The clamp body 1 is integrally provided with a terminal mounting portion 11 extending obliquely downward from one upper end thereof, and a lead wire (not shown) is connected to the terminal mounting portion 11 so that a bypass wire or a ground wire is drawn out. .
[0023]
A head of a screw shaft 13 that is screwed to the lower end base 12 of the clamp body 1 is rotatably connected to the movable contact base 3. Further, an engaging portion 14 is integrally provided at one end portion of the movable contact base 3 so as to be slidably engaged with the vertically extending intermediate portion of the clamp body 1 in the vertical direction. By rotating the screw shaft 13, the movable contact base 3 moves in the vertical direction of the clamp body 1 without rotating, and the contact blade 2 can be moved closer to or away from the grooves 5a and 5b.
[0024]
A knob 15 is fixed to the lower end of the screw shaft 13, and the knob 15 is connected to an insulating operation rod (not shown) via a jig (not shown) equipped with a torque limiter.
Next, the case where the connection clamp apparatus of a present Example is attached to the strand A is demonstrated.
[0025]
In the case of a large diameter stranded wire, the locking hole 9b is locked to the positioning pin 8 and the electric wire holding plate 7 is allowed to escape from the concave groove 5A. In the case of a small diameter stranded wire, as shown in FIG. The stop hole 9a is engaged with the positioning pin 8, and the electric wire holding plate 7 is rotated and moved so as to overlap the concave groove 5a. Next, the knob 15 is set on a jig attached to the tip of the insulating operation rod, the connection clamp device is lifted to the position of the stranded wire A, and is hooked so that the stranded wire A is engaged with the concave groove 5a or 5b. Thereafter, the knob 15 (screw shaft 13) is rotated to raise the movable contact base 3, and the contact blade 2 is passed through the insulation coating of the stranded wire A to contact the conductor. Thereby, an electric current flows into the lead wire connected to the terminal attachment part 11, and a bypass wire and a ground wire can be taken.
[0026]
At this time, the twisted torque of 1470 N · cm (150 kgf · cm) to 1960 N · cm (200 kgf · cm) is applied to the knob 15 and the screw shaft 13 by the torque limiter of the jig. It is held between 5b and the contact blades 2 and 16. Further, substantially the entire longitudinal direction of the cutting edge of the contact blades 2 and 16 is in contact with the stranded wire A (element wire a), and a part of the cutting blade of the contact blades 2 and 16 in the longitudinal direction is stranded wire A (element wire). There is no risk of being damaged by pressure bonding to a).
[0027]
In the case of the present embodiment, the concave grooves 5a and 5b are formed so as to correspond to the diameters of the large and small twisted wires A so as to be substantially equal to the wire diameter, so that a large current (10 kA to 12. Even if 5 kA) flows abruptly, the stranded wire A hardly moves in the grooves 5a and 5b, and there is no possibility that the stranded wire A is blown or the connection clamp is broken. Further, the contact blades 2 and 16 can be brought into contact with each other without damaging the element wire A constituting the stranded wire A, the contact area with the conductor of the stranded wire A increases, and the insulation coating of the stranded wire A The contact pressure between the wire holding part 4 and the wire holding part 4 does not increase so much, that is, no large pressure acts on the insulation coating from the wire holding part 4, so that the insulation coating "sags" due to the creep phenomenon even in long-term use. There is no contact area, contact pressure does not decrease, contact resistance does not increase, and is stable.
[0028]
In the above embodiment, the contact blades 2 and 16 are provided. However, as shown in FIGS. 7 and 8, only the contact blade 2 may be used, and the wire holding plate 7 is provided with one concave groove 5b. However, a plurality of grooves may be provided in accordance with the diameter of the electric wire. Further, the present invention can also be applied to a connection clamp device that does not include the electric wire holding plate 7.
[0029]
【The invention's effect】
As described above, the connection clamp device according to the present invention is configured so that the contact edge of the contact blade is at a slight angle of 1 ° to 6 ° with the axis of the stranded wire so that the blade edge portion does not bite between the strands constituting the stranded wire. Since they are arranged so as to intersect, sufficient contact pressure can be secured between the contact blade and the strand without damaging the strands of the strand, and the contact blade can be changed according to the diameter of the strand. There is an effect that it is not necessary.
[0030]
In addition, when the stranded wire holding part on the upper part of the clamp body is a groove having a size approximately equal to the wire diameter for each wire diameter, the groove and the wire are in surface contact with each other, and even if a large current flows, the contact blade and the stranded wire A constant contact pressure can be obtained by securing the contact area with the conductor and controlling the gripping force and tightening torque on the conductor, and the contact resistance is low, and the generation of Joule heat can be kept low. In addition, even if vibration due to an impact force when a large current flows is applied, the contact area and the contact pressure are not changed.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a connection clamp device of the present invention.
FIG. 2 is a front view of the same.
FIG. 3 is an enlarged perspective view of a contact blade.
FIG. 4 is a plan view of a contact blade.
FIG. 5 is a plan view for explaining a relationship between a stranded wire and a contact blade.
6 is an explanatory cross-sectional view taken along the line VI-VI in FIG.
FIG. 7 is another plan view for explaining the relationship between the stranded wire and the contact blade.
8 is an explanatory sectional view taken along line VIII-VIII in FIG.
[Explanation of symbols]
1 Clamp body 2, 16 Contact blades 2 a, 2 b, 2 c, 16 a, 16 b, 16 c Top portion 3 Movable contact base 4 Electric wire holding portion 4 a Wire holding body 5 a, 5 b Groove 6 pin 7 Electric wire holding plate 8 Positioning pin 9 Locking hole 11 Terminal mounting part

Claims (2)

In the connection clamp device provided with the linear contact blade that penetrates the insulation coating of the stranded wire,
The contact blade is arranged so as to be inclined at an angle of 1 ° to 6 ° in a direction opposite to the angle formed by the strands constituting the strand with respect to the axis of the strand. Connection clamp device to do. The connection clamp device according to claim 1,
A connection clamp device, wherein the angle of inclination is 3.8 to 5.7 °.

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