JP4096134B2 - Compression sleeve and wire connection method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a compression sleeve for connecting electric wires.
[0002]
[Prior art]
Conventionally, a compression sleeve for connecting electric wires has a substantially circular cross-sectional shape. For this reason, when the compression sleeve is clamped between dies, it is uniformly compressed over the entire circumference of 360 °.
[0003]
Therefore, in the case where the electric wire is a thick stranded wire made up of a large number of strands, the pressing action of the die does not easily reach the strands within the intermediate portion, and the strands within the intermediate portion are poorly connected. Incidentally, the conventional compression sleeve has a limitation that cannot be applied to an electric wire having a diameter of approximately 30 mm or more. This is a particular problem in the case of an electric wire twisted together with several layers of stranded wires and a gap between the stranded wires filled with a compound. In this type of electric wire, due to the compound, the ripple effect of the die pressing action on the stranded wire within the intermediate portion is further deteriorated, and the connection of the stranded wire within the intermediate portion is further deteriorated.
[0004]
The conventional compression sleeve has an end surface perpendicular to the longitudinal axis of the sleeve. In the case of the compression sleeve in which the vertical axis and the end face are orthogonal, in the case of the connection of the hot wire that has been required more recently, good workability cannot be obtained as follows.
[0005]
A live line is an electric wire already installed on a power transmission tower or the like, and its connection is a work with a narrow scaffold.
[0006]
For the connection of the live wire, an indirect live wire method (a method of working with an insulating operation rod or the like at a place away from the live wire) is taken.
[0007]
In order to connect the electric wires using the compression sleeve, it is necessary to center the other half side of the sleeve in which the end portion of one electric wire is inserted into one half side and the end portion of the other electric wire.
[0008]
When a sleeve whose end face is perpendicular to the longitudinal axis is inserted into the half of the sleeve, the end face of the other half of the sleeve is almost the same with respect to the longitudinal axis of the end of the wire about 360 ° around the coaxial line. It is.
[0009]
Therefore, if the center of the other end side of the sleeve and the other end of the wire is misaligned, the direction of at least one end of the two wires is set to align the end surface with the end of the wire. Need to change.
[0010]
It is not easy to change the direction of the end of the electric wire for an electric wire having a bent end. The end portion of the connected electric wire is bent, for example, on a jumper wire (see FIG. 3). In FIG. 3, 4 indicates a jumper line, and 5 indicates a connected portion of the jumper line 3.
[0011]
It is difficult to correct the direction of the end of the bent electric wire by indirect handling with an operation rod or the like, and by working on a narrow scaffold.
[0012]
Conventionally, it is unsolved about the point which improves the workability | operativity of the connection of the hot wire by a compression sleeve.
[0013]
[Problems to be solved by the invention]
An object of the present invention is to develop a wire connecting sleeve that can satisfactorily connect wires within an intermediate portion even with a wire having a large diameter of about 30 mm.
[0014]
Another object of the present invention is to make it easy to center the compression sleeve end face and the end of the electric wire, which are required for the connection, even if the connected end is curved. .
[0015]
[Means for Solving the Problems]
The compression sleeve of the present invention is a compression sleeve in which the end faces on both sides of the one half side and the other half side are open and connects one electric wire and the other electric wire, and at least the end face on the other half side of the both end faces is When one electric wire is inserted on one half side, it is formed obliquely with respect to the vertical axis so that the direction of the opening of the end surface on the other half side is changed by turning around one electric wire. Preferably, the end face on one half side is formed obliquely with respect to the vertical axis. The method for connecting electric wires according to the present invention uses a compression sleeve in which end surfaces on both sides of one half side and the other half side are open, and at least the other half side end surfaces are formed obliquely with respect to the longitudinal axis. A method of connecting a wire to the other wire, the step of inserting one wire into one half of the compression sleeve, and the end of the other wire by turning the compression sleeve around the one wire And centering the opening of the end surface on the other half side, inserting the other electric wire into the other half side of the compression sleeve, and compressing the compression sleeve to compress one electric wire and the other electric wire. Fixing to the sleeve. Preferably, one electric wire and the other electric wire are connected by an indirect hot wire method. Moreover, in the other aspect of this invention, the cross-sectional shape of the outer peripheral surface of the compression sleeve which connects an electric wire is made into the ellipse or the ellipse. Preferably, in the compression sleeve having the above configuration, at least one of the front and rear end faces of the sleeve is formed obliquely with respect to the longitudinal axis of the sleeve.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. The compression sleeve 1 to which the electric wire is connected has an outer circumferential surface having an oblong or elliptical cross section. In the figure, 3 is a stopper that regulates the insertion depth of the electric wire 2.
[0017]
When the compression sleeve 1 whose outer peripheral surface has an elliptical cross section or an elliptical shape is clamped between the dies, the pressing force of the die is strongly and intensively applied to the long diameter region of the elliptical or elliptical shape on the outer peripheral surface of the sleeve 1. . For this reason, as for the sleeve 1, the said long diameter area | region will carry out plastic deformation more strongly than others.
[0018]
That is, in the long diameter region of the compression sleeve 1, the pressing action of the die works firmly. For this reason, even if the to-be-connected electric wire 2 is as thick as about 30 mm in diameter, the connection state of the strand 2a within the electric wire middle part is improved.
[0019]
Preferably, the compression sleeve 1 has the front and rear end faces 1a, 1a or one face 1a formed obliquely with respect to the longitudinal axis of the sleeve. The sleeve 1 whose front and rear end faces are oblique is shown in FIG. 1 (A), and the sleeve 1 whose one face is oblique is shown in FIG. 1 (B). When the end face 1a of the sleeve 1 is inclined, the following effects are obtained.
[0020]
As described above, it is difficult for the sleeve whose end face is perpendicular to the vertical axis to be centered with the end of the electric wire when connecting the curved electric wire.
[0021]
On the other hand, in the sleeve 1 with the end face 1a inclined, when the both end faces are inclined, the end face on the other half side is inclined with respect to the longitudinal axis of the end of the electric wire when fitted to the end of the electric wire 2 on one side. Become.
[0022]
Therefore, by rotating the sleeve 1 around the electric wire 2, the direction of the other half side end surface of the sleeve 1 with respect to the longitudinal axis of the end portion of the electric wire 2 is changed. This means that the centering of the sleeve end surface 1a and the end of the electric wire 2 can be performed without changing the direction of the end of the electric wire 2. That is, the center adjustment can be easily performed.
[0023]
In the sleeve 1 whose one end face 1a is slanted, if the end face is not slanted, the end face on the other half side is slanted with respect to the longitudinal axis of the wire end, Similar results are obtained.
[0024]
【The invention's effect】
As is clear from the above description, according to the present invention, the following effects are achieved.
[0025]
1. Even in the case of an electric wire with a large diameter of about 30 mm, the pressing action of the die can be propagated within the middle part of the wire under the intervention of the compression sleeve applied thereto, and the connection of the strands within the middle part of the wire is good. Turn into.
2. Even for an electric wire whose connected end is curved, the centering of the compression sleeve end face required for the connection and the end of the electric wire can be easily performed.
[Brief description of the drawings]
1A is a front view showing an example of a compression sleeve according to the present invention, and FIG. 1B is a front view of another example of the compression sleeve according to the present invention.
FIG. 2 is a side view of the sleeve shown in FIGS. 1 (A) and 1 (B).
FIG. 3 is an exemplary slope view of a jumper line.
[Explanation of symbols]
1 Compression sleeve 1a End face 2 Connected wire

Claims (4)

A compression sleeve that is open at both end faces of one half side and the other half side and connects one electric wire and the other electric wire,
At least the end surface on the other half side of the end surfaces on both sides is rotated around the one electric wire when the one electric wire is inserted into one half side, so that the opening direction of the end surface on the other half side is changed. A compression sleeve formed obliquely with respect to the longitudinal axis so as to change. The compression sleeve according to claim 1, wherein the end face on the half side is formed obliquely with respect to the longitudinal axis. An electric wire that connects one electric wire and the other electric wire using a compression sleeve in which the end surfaces on both sides of the one half side and the other half side are open and at least the end surface of the other half side is formed obliquely with respect to the longitudinal axis Connection method,
Inserting the one electric wire into one half of the compression sleeve;
Centering the end of the other electric wire and the opening of the end surface of the other half side by turning the compression sleeve around the one electric wire;
Inserting the other electric wire into the other half of the compression sleeve;
Fixing the one electric wire and the other electric wire to the compression sleeve by compressing the compression sleeve;
A method for connecting electric wires, including: The electric wire connection method according to claim 3, wherein the one electric wire and the other electric wire are connected by an indirect hot wire method.

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