JPH04162386A - Clamping method for cable terminal - Google Patents

Abstract

PURPOSE:To prevent disconnection due to breaking a core wire while uniformly calking the core wire in a stripped part to prevent the wire from falling off by inserting a cylindrical part of a terminal the stripped part, and calking the periphery of this cylindrical part by a pair of calking metal molds so as to form a polygonal shape. CONSTITUTION:A cylindrical part 4 of a terminal 3 is inserted to a stripped part 2 of a cable 1. Thereafter, this cylindrical part 4 is arranged between lower and upper calking metal molds 6, 7 to from calking parts polygonally, for instance, such as hexagonally in zigzag shape in the periphery of the cylindrical part 4 by a crank mechanism. In this way, a core wire of the stripped part 2 is uniformly calked without unevenness and made possible to prevent not only falling off but also breaking the core wire and disconnection due to calking in the above-mentioned cylindrical part 4.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention provides a method for attaching a cylindrical terminal to a strip part of a cable such as a strip part formed at the end of an electric wire or an optical fiber strip part. The present invention relates to a method for crimping cable terminals in which parts are crimped to form a polygon.

(Prior art) This type of cable terminal crimping method has already been proposed.
The method is as shown in FIGS. 10 to 13.

That is, in FIGS. 10 to 13, for example, a strip part Wa is formed at the end of the electric wire W having a wire number mark m, and this strip part Wa has, for example,
A cylindrical part a1 of a conductive terminal a such as a closed barrel terminal is inserted, and a part of the outer periphery of this cylindrical part a1 has the only concave dent, which is removed using a caulking tool C. It is caulked to prevent it from coming out.

That is, as shown in FIG. 13, the caulking tool C has a toggle mechanism (6ii) at the free end of a pair of handles d with a support shaft e and each pin f, and a pair of caulking blades g1 and g2.
is rotatably pivoted, an arcuate portion is formed in the middle of one of the caulking blades g1, the outer periphery of the cylindrical portion a1 is placed on this arcuate portion, and the position of this arcuate portion is A convex caulking portion l is formed in the middle of the other caulking blade g2.

Therefore, in the cable terminal crimping method described above, the cylindrical portion a1 of the conductive terminal a is inserted into the strip portion Wa of the electric wire W, and then the cylindrical portion al of the terminal a is inserted using the crimping tool C. The cylindrical portion a1 is placed on the arcuate portion of one of the caulking blades g1, is held in contact with the convex caulking portion 1 of the other caulking blade g2, and is firmly gripped by the pair of handles d. A part of the outer periphery is caulked with concave dents to prevent it from coming out (see Figures 11 and 12).

(Problem to be solved by the invention) However, the method for caulking two consecutive cable terminals is such that caulking is performed by a concave dent on a part of the outer periphery of the cylindrical portion a1, and the cable terminal cannot be removed. As shown in FIG. 12, the core wire w1 of the strip portion Wa located in the concave dent area is tightly caulked, and on the other hand, the core wire w1 of the strip part Wa located in the concave dent area Strip part W
As a result, the core wire wl of a is held in a rough state, and it is not only difficult to uniformly caulk the strip portion Wa with the core wire W1, but also cause the caulking Nj to be difficult due to the concave dents of the cylindrical portion a1. If it is too strong, there is a risk that the core wire w1 of the strip portion Wa will break and break, and furthermore, caulking due to the concave dents (-4) will impair the appearance and make it difficult to improve quality.

The present invention has been made in view of the above-mentioned circumstances, and involves inserting a cylindrical portion of a terminal into a strip portion of a cable, and caulking the outer periphery of the cylindrical portion with a pair of crimping molds to form a polygon. By attaching it, the core wire of the strip part is caulked uniformly to prevent it from coming out, and the core wire is prevented from breaking due to the caulking of the cylindrical part, thereby improving quality without damaging the appearance. It is an object of the present invention to provide a method for crimping a cable terminal as described above.

[Structure of the invention]

(Means for Solving the Problems and Their Effects) In the present invention, a cylindrical part of a terminal is inserted into a strip part of a cable, and then a polygon is formed on the outer periphery of this cylindrical part using m pairs of crimping molds. This is a cable terminal crimping method in which the core wire of the strip part is crimped uniformly and without variation, so that it does not come out.

(Example) Hereinafter, the present invention will be described with reference to an illustrated embodiment.

1 to 8, reference numeral 1 denotes a cable such as an electric wire, and the end of the cable 1 includes:
A strip portion 2 is formed, and this strip portion 2
The cylindrical portion 4 of the conductive terminal 3 is inserted into the cylindrical portion 4 of the conductive terminal 3. Further, on the outer periphery 4a of the cylindrical portion 4, for example, hexagonal polygonal crimping parts 5a and 5b are crimped with a pair of crimping molds 6.7 so as to form a staggered pattern. It is formed as follows.

That is, the cable terminal crimping means is constructed as shown in FIGS. 6 to 8.

6 to 8, a pair of guide frames 9 integral with the machine frame are erected facing each other on a flat base plate 8, and inside the guide frames 9, Each guide groove 10a
or is formed. In addition, a caulking A/J mold 6 as a lower mold is fitted and fixed in the lower part of each guide groove 10a. As shown in FIG. 8, for example, grooves 11 forming half of a hexagon are formed in three rows with gaps 2 between them to form the caulking part 5a. Further, each of the guide grooves 10a above the caulking mold 6
A caulking mold 7 as an upper mold is connected to the upper part of the caulking mold 7 so as to be slidable in the vertical direction via, for example, a crank lever 13 of a crank mechanism. As shown in FIGS. 7 and 8,
For example, the groove portions 14 forming half of a hexagon are formed in two rows with gaps 15 therebetween to form the caulking portions 5b.

In other words, the caulking mold 6 as the lower die and the caulking die 7 as the upper die have hexagonal polygonal caulking parts 5a and 5b alternately as if forming a thousand islands. It is designed to be formed by caulking.

Therefore, when crimping the cylindrical portion 4 of the terminal 3 of the cable 1 into a polygonal shape, the cylindrical portion 4 of the terminal 3 is inserted into the strip portion 2 of the cable 1 in advance. Thereafter, this cylindrical portion 4 is placed between a caulking die 6 as a lower die and a caulking die 7 as an upper die by the cable terminal caulking means, and the caulking die as the upper die is used. By lowering the mold 7 via the crank lever 13 of the crank mechanism, a hexagonal shape, for example, is formed on the outer periphery of the cylindrical portion 4 due to the joint action of the crimping mold 6 and the crimping mold 7 as an upper mold. The caulking portions 5a and 5b, each having a polygonal shape, are formed as if staggered.

In this way, the method of caulking the cable terminal is to caulk the core wires of the strip part 2 uniformly and uniformly so that they do not come out, and to caulk the cylindrical part 4 to prevent disconnection due to breakage of the core wire. We aim to improve quality without damaging the appearance.

Next, in another embodiment of the present invention shown in FIG. 9, one end 20a of the optical fiber cable 20 is inserted into a terminal 21 having a cylindrical part 21a, and the threaded part 2 of this terminal 21 is
a can be screwed onto the threaded portion 22a of the socket 22, and is caulked to the outer periphery of the cylindrical portion 21a in a polygonal shape using a pair of caulking molds 6.7, and in a zigzag shape. This is a method of caulking a cable terminal in such a manner that the cable terminal is formed into a shape.

〔Effect of the invention〕

As described above, according to the present invention, the cylindrical part of the terminal is inserted into the strip part of the cable, and then the cable is crimped to form a polygon with a pair of crimping dies around the outer periphery of the cylindrical part. Since it is a terminal crimp method,
Not only can the core wire of the strip part be caulked uniformly without any variation to prevent it from coming out, but also the cylindrical part can be caulked to prevent the core wire from breaking or breaking. It has excellent effects such as being able to improve the

[Brief explanation of drawings]

Fig. 1 is a side view for explaining the application of the cable terminal crimping method of the present invention to a strip of electric wire;
The figure is a perspective view of the same as above, FIG. 3 is a front view of the same as above, and FIG.
FIG. 5 is a cross-sectional view taken along the chain line A-A in FIG. 1, FIG. 6 is a cross-sectional view taken along the chain line B-B in FIG. 1, and FIG. FIG. 7 is a side view showing an enlarged main part of the cable terminal crimping means, and FIG. 8 is a diagram illustrating the cable terminal crimping means applied to the strip. FIG. 9 is a sectional view showing another embodiment of the present invention, and FIG. 10 is an illustration of an already proposed cable terminal crimping method. 11 is a perspective view of the same as above, FIG. 12 is a sectional view taken along the chain line C-C in FIG. 10, and FIG. It is a front view for explaining the caulking means of the cable terminal applied to the strip of electric wire. DESCRIPTION OF SYMBOLS 1... Cable, 2... Strip part, 3... Terminal, 4... Cylindrical part, 5a, 5b... Crimping part,... 6.7... Crimping metal Type. Applicant's agent Mr. Sato

Claims (1)

[Claims] A method for caulking a cable terminal, which comprises inserting a cylindrical part of the terminal into a strip part of a cable, and then caulking the outer periphery of the cylindrical part to form a polygon using a pair of caulking dies.