JP3679185B2 - Crimp connection method for conductors - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a conductor crimping connection method for crimping and connecting a double conductor having a U-shaped conductor crimping piece.
[0002]
[Prior art]
In general, a terminal crimping apparatus using a U-shaped conductor crimping piece has two semicircular arc surfaces that meet at a central ridge in the back part adjacent to the female guide surface, and the upper end is a flat surface. In the crimping process with the male mold, the ends of the side walls 1a and 1b of the U-shaped conductor crimping piece 1 are bent in the direction of the conductor 2 and project toward the conductor 2 as shown in FIG. The crimp terminal of this system is widely used because it can crush and hold the conductor 2 by simply bending the side wall of the conductor crimping piece, acting with a relatively small pressing force.
[0003]
[Problems to be solved by the invention]
However, in recent years, as shown in FIG. 6 for a special purpose, a soft conductor 4 such as copper is disposed around a hard conductor 3 such as stainless steel, and a double core including a reinforcing core wire surrounded by an insulating coating 5. A conductor wire 6 may be used.
[0004]
When a crimp terminal is connected to the double conductor 7 of the double conductor electric wire 6, a strong and reliable electrical connection is expected if the central hard conductor 3 is not securely held in the center. Can not.
[0005]
However, in the conventional crimping structure shown in FIG. 5, since the central hard conductor 3 is difficult to plastically change, it is not always located at the center, but is displaced to the left or right, and cannot be reliably held, and the tensile force The holding may come off due to the like.
[0006]
An object of the present invention is to solve the above-mentioned problems and to provide a method for crimping and connecting conductors that can be securely clamped by arranging a hard conductor at the center of a crimping structure.
[0007]
[Means for Solving the Problems]
The method for crimping and connecting a conductor according to the present invention to achieve the above object is a method of connecting a crimping terminal to a double conductor having a hard conductor in the center and surrounding a soft conductor. form songs two conductor crimping pieces made of U-shaped side walls of the double conductor between the bottom of the conductor crimping pieces with tightening siege on the bottom by the convex type of the crimping device Article 2 of the groove spaced formed toward the double conductor, characterized in that make positioning the rigid conductor between said groove.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail based on the embodiment shown in FIGS.
FIG. 1 shows a known crimp terminal for connecting to a conductor of an electric wire, and two conductor crimping pieces 12a and 12b having the same height are formed in a U shape on the rear side of a main body 10 (not shown) on both sides from a bottom portion 11. It is launched in a shape. In addition, a crimping piece for crimping the covering portion may be further provided in a U shape at the rear part of the conductor crimping pieces 12a and 12b.
[0009]
As shown in FIG. 2, the pressing die of the crimping apparatus is composed of a male mold 13 and a female mold 14. The male mold 13 is for molding the bottom 11 between the conductor crimping pieces 12a and 12b, and has two strips on the upper surface. Convex molds 15a and 15b. The female mold 14 has a generally known structure, has curved guide surfaces 16a and 16b, and has two semicircular arc portions 17a for bending the upper ends of the conductor crimping pieces 12a and 12b at the innermost portion. 17b is provided.
[0010]
Using the crimp terminal shown in FIG. 1, the double conductor 7 from which the insulation coating 5 of the double conductor wire 6 is peeled is placed on the bottom 11 as shown in FIG. Insert between the female mold 14. Here, when the female die 14 is lowered or the male die is raised, the conductor crimping pieces 12a and 12b are bent inward by the guide surfaces 16a and 16b of the female die 14, and the female die 14 and the male die 13 are further brought closer to each other. Then, the ends of the conductor crimping pieces 12a and 12b are bent by the semicircular arc portions 17a and 17b of the female die 14 so as to face downward as shown in FIG. 4, and at the bottom 11 between the conductor crimping pieces 12a and 12b, The two grooves 18a and 18b are formed by the convex molds 15a and 15b.
[0011]
As a result, the double conductor 7 is held by the conductor crimping pieces 12a and 12b, the hard conductor 3 is positioned between the groove portions 18a and 18b of the bottom 11, and the soft conductor 4 is plastically deformed around the hard conductor 3 to be firmly Connection is possible.
[0012]
【The invention's effect】
As described above, according to the method for crimping and connecting conductors according to the present invention, a rigid and reliable connection can be achieved by substantially sandwiching a double conductor hard conductor between two grooves formed on the bottom. .
[Brief description of the drawings]
FIG. 1 is a perspective view of a connection terminal.
FIG. 2 is a front view of a male mold and a female mold.
FIG. 3 is an explanatory diagram of a crimping process.
FIG. 4 is a cross-sectional view of a state in which a conductor is crimped.
FIG. 5 is a cross-sectional view of a state in which a conventional conductor is crimped.
FIG. 6 is a cross-sectional view of a double conductor electric wire.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 Hard conductor 4 Soft conductor 6 Double conductor electric wire 7 Double conductor 10 Main body 11 Bottom part 12a, 12b Conductor crimping piece 13 Male type 14 Female type 18a, 18b Groove part

Claims (1)

This is a connection method in which a crimp terminal is connected to a double conductor having a hard conductor in the center and surrounding a soft conductor , and two conductor crimp pieces made of U-shaped side walls of the crimp terminal are bent. to, the double-conductor between the bottom of the conductor crimping pieces with tightening siege formed toward the groove 2 Article spaced to said bottom portion by the convex type of the crimping device to the dual conductor , conductor crimping connection method, characterized in that make positioning the rigid conductor between said groove.

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