JP2022170234A - Method for manufacturing electric wire with terminal - Google Patents

Abstract

To provide a method for manufacturing an electric wire with a terminal capable of improving the reliability of electrical connection between the terminal and the wire.SOLUTION: A terminal 20 includes a press contact blade 41 including a pair of pressure contact portions 42, a pair of blade portions 43 provided on the front side in the mounting direction of the pair of pressure contact portions 42 and cutting and opening an insulating coating 12, and a base portion 44 provided on the rear side in the mounting direction of the pair of pressure contact portions 42 and connecting the pair of pressure contact portions 42. The manufacturing method thereof a first step of cutting and opening a part of the insulating coating 12 by pushing an electric wire 10 toward the back side in the mounting direction to between the pair of blade portions 43 or between the pair of pressure contact portions 42, and a second step of pushing the electric wire 10 into the mounting direction back side until the conductor core wire 11 reaches the base portion 44 and cutting and opening the other portion of the insulating coating 12 and bringing a conductor core wire 11 into conductive contact with the base portion 44 and the pair of pressure contact portions 42 after the electric wire 10 is rotated around the axis of the electric wire 10 at a position closer to the mounting direction than the pair of pressure contact portions 42.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing an electric wire with a terminal for manufacturing an electric wire with a terminal attached to the electric wire.

Conventionally, there has been proposed a terminal-equipped electric wire in which a terminal and an electric wire are conductively connected by press-contacting (that is, press-contacting) a conductor core wire of the electric wire while sandwiching the conductor core wire of the electric wire with press-contact blades provided on the terminal. This type of electric wire with a terminal is typically obtained by inserting the electric wire with the conductor core covered with the insulation coating between the pressure contact blades as it is, and by inserting the insulation coating with the blade provided at the tip of the pressure contact blade. are cut open, and the pressure-contact blade is brought into contact with the conductor core wire exposed from the cut portion of the insulation coating, thereby improving workability of conductive connection (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2001-313095

By the way, due to the structure of the pressure contact blade described above, although the pressure contact blade can contact a part of the conductor core wire exposed from the cut portion of the insulation coating, it cannot be pressure contacted to the other part of the conductor core wire covered with the insulation coating. The blade cannot touch. Therefore, only a portion of the conductor core wire contributes to conduction between the terminal and the wire, and the other portion of the conductor core wire does not contribute to the conduction. On the other hand, if the interval (slot width) between the pressure contact blades is narrowed carelessly in order to increase the contact area between the conductor core wire and the pressure contact blades, it becomes difficult to push the wire into the pressure contact blades. In other words, the contact area between the pressure contact blade and the conductor core wire is actually not that large, and it is not easy to increase the contact area. However, from the viewpoint of increasing the reliability of the electrical connection between the terminal and the wire, by expanding the contact area between the conductor core wire and the pressure contact blade, even better conduction between the conductor core wire and the pressure contact blade is achieved. It is desirable to

SUMMARY OF THE INVENTION The present invention has been made in view of the circumstances described above, and an object thereof is to provide a method of manufacturing a terminal-equipped wire that can improve the reliability of electrical connection between the terminal and the wire.

In order to achieve the above object, a method for manufacturing an electric wire with a terminal according to the present invention is characterized by the following [1] to [4].
[1]
A method for manufacturing an electric wire with a terminal for manufacturing an electric wire with a terminal in which a terminal is attached to the electric wire, comprising:
The electric wire is
having a conductor core wire and an insulating coating covering the conductor core wire,
The terminal is
a pair of pressure contact portions extending in the direction in which the terminal and the wire are attached and press-contacting with the conductor core sandwiched therebetween; A pressure contact blade having a pair of blade portions for cutting and opening, and a base portion provided on the back side of the pair of pressure contact portions in the mounting direction and connecting the pair of the pressure contact portions,
The manufacturing method is
By pushing the electric wire toward the back side in the mounting direction to between the pair of blade portions or between the pair of pressure contact portions via between the pair of blade portions, the insulation coating is removed. A first step of cutting open a part in the circumferential direction;
After the wire that has undergone the first step is rotated by a predetermined angle around the axis of the wire at a position closer to the mounting direction than the pair of pressure contact portions, the conductor core wire reaches the base. By pushing it in toward the back side in the mounting direction until it reaches the point where it is attached, the other part of the insulating coating in the circumferential direction is cut open, and the conductor core wire is connected to the base part and the pair of the conductor core wires through the cut open part and the other part. and a second step of making conductive contact with the pressure contact portion of
It shall be a method for manufacturing an electric wire with a terminal.
[2]
In the production method described in [1] above,
In the second step,
Rotate the electric wire about the axis by the predetermined angle so that at least a part of the cut portion generated by cutting the insulating coating in the first step faces the base.
It shall be a method for manufacturing an electric wire with a terminal.
[3]
In the production method according to [1] or [2] above,
In the second step,
The wire is pulled back to a position on the front side in the mounting direction relative to the pair of blades, and the wire is rotated around the axis in a state in which the insulating coating is separated from the pair of blades.
It shall be a method for manufacturing an electric wire with a terminal.
[4]
In the production method according to [1] or [2] above,
In the second step,
When the electric wire is pushed between the pair of blade portions in the first step, the electric wire is pushed into the axial line while the pair of blade portions are in contact with the insulating coating. When the electric wire is pushed between the pair of pressure contact portions in the first step, the electric wire is pulled back between the pair of blade portions to push the pair of blade portions. is in contact with the insulating coating, rotating the wire around the axis;
It shall be a method for manufacturing an electric wire with a terminal.

According to the method for manufacturing an electric wire with a terminal having the configuration [1], in the first step, the electric wire is pushed inward in the mounting direction up to between the blade portions or between the pressure contact portions, thereby removing the conductor core wire. A part of the covering insulating coating is cut open by the blade. Next, in the second step, the electric wire is rotated around the axis at a position closer to the installation direction than the pressure contact portion (that is, the position of the blade portion or a position closer to the installation direction than the blade portion). When the wire is in the position of the blade, this rotation further cuts open the other part of the insulation by rotating the insulation in contact with the blade. Then, the conductor core wire is pushed in until the conductor core wire reaches the base portion, so that the conductor core wire is brought into conductive contact with both the pressure contact portion and the base portion via part and other portions of the insulation coating that has been cut open. On the other hand, when the wire is located on the front side of the blade in the mounting direction, a portion (another portion) different from the cut portion of the insulating coating in the first step can be opposed to the blade by rotating the wire. . Then, the electric wire is pushed in until the conductor core wire reaches the base, and the other part of the insulation coating is cut open by the blade, and the conductor core wire passes through the cut-out part and other parts of the insulation coating. It will be in conductive contact with both sides of the base. Thus, in any of the above-described cases, the contact area between the conductor core wire and the pressure contact blade can be increased. Therefore, the method for manufacturing a terminal-equipped wire having this configuration can improve the reliability of the electrical connection between the terminal and the wire.

According to the method for manufacturing an electric wire with a terminal having the configuration [2], in the second step, the electric wire is rotated around the axis so that at least a part of the cut portion of the insulation coating generated in the first step faces the base. Let That is, the predetermined angle by which the wires are rotated is determined to achieve this alignment. As a result, when the electric wire is pushed inward in the mounting direction after that, the conductive core wire and the base of the press-contact blade can be more reliably brought into electrical contact with each other through the cut portion.

According to the method for manufacturing an electric wire with a terminal having the configuration [3] above, if the electric wire is at a position closer to the mounting direction than the blade in the second step (that is, at a position where the insulation coating is away from the blade) , by rotating the electric wire, a portion (another portion) different from the cutting portion in the first step of the insulation coating can be opposed to the blade portion. After that, the electric wire is pushed in until the conductor core wire reaches the base portion, so that the other portion of the insulating coating is cut open by the blade portion and the conductor core wire is brought into conductive contact with both the pressure contact portion and the base portion.

According to the method for manufacturing an electric wire with a terminal having the configuration [4] above, when the electric wire is at the position of the blade portion (that is, the position where the blade portion contacts the insulating coating) in the second step, the electric wire rotates. Then, a portion (another portion) different from the cut portion in the first step of the insulation coating is further cut open. After that, the electric wire is turned and pushed until the conductor core wire reaches the base portion, so that the conductor core wire is brought into conductive contact with both the pressure contact portion and the base portion.

ADVANTAGE OF THE INVENTION According to this invention, the electric wire with a terminal which can improve the reliability of the electrical connection between a terminal and an electric wire can be provided.

The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading the detailed description below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an electric wire and terminals used in a method for manufacturing an electric wire with terminals according to an embodiment of the present invention. FIG. 2(a) is a front view showing an enlarged press-contact blade included in the terminal shown in FIG. 1, and FIG. 2(b) is a cross-sectional view of the wire shown in FIG. FIG. 3(a) is a front view for explaining the first step, FIG. 3(b) is an enlarged view of the electric wire shown in FIG. 3(a), and FIG. 3(d) is an enlarged view of the wire shown in FIG. 3(c), and FIG. 3(e) is a front view for explaining the first half of the second step; FIG. 3(f) is an enlarged view of the electric wire shown in FIG. 3(e). FIG. 4 is a front view for explaining the state of contact between the conductor core wire of the electric wire and the pressure contact blade after the completion of the second step. 5(a) to 5(f) are diagrams corresponding to FIGS. 3(a) to 3(f), respectively, in the manufacturing method of the terminal-equipped wire according to the modification. FIG. 6 is a perspective view showing an electric wire and a terminal used in an electric wire with terminal according to a modification.

Hereinafter, a method for manufacturing a terminal-equipped wire 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. As shown in FIG. 1 , the electric wire 1 with a terminal is brought into contact with the electric wire 10 by holding the conductor core 11 of the electric wire 10 between two press-contact blades 41 provided on the terminal 20 , which will be described later. It is an electric wire with a terminal to be connected.

Hereinafter, for convenience of explanation, as shown in FIGS. . The "front-rear direction", the "width direction" and the "vertical direction" are orthogonal to each other. The front-rear direction corresponds to the extension direction of the terminal-equipped electric wire 1 (more specifically, the terminal 20), and the front side and rear side correspond to the distal end side and the proximal end side of the terminal 20, respectively. The upper side and the lower side respectively correspond to the "mounting direction front side" and the "mounting direction back side" of the present invention. Hereinafter, each member constituting the electric wire 1 with terminal will be described in order.

First, the electric wire 10 will be described. As shown in FIG. 1 , the electric wire 10 includes a conductor core wire 11 and an insulating coating 12 that covers the outer periphery of the conductor core wire 11 . In addition, in FIG. 1 , in order to facilitate understanding of the internal structure of the electric wire 10 , the insulating coating 12 is shown by a dashed line only at a predetermined length from the tip of the electric wire 10 , so that the insulating coating 12 is actually covered with the insulating coating 12 . The conductor core wire 11 is visually recognized (this also applies to FIG. 6, which will be described later).

In this example, the conductor core wire 11 is a so-called twisted wire in which a plurality of wires 13 are twisted together. The twisting direction of the conductor core wire 11 (the plurality of wires 13) is, for example, the same one direction over the entire length of the conductor core wire 11. As shown in FIG. Each wire 13 is made of a conductive metal such as aluminum or an aluminum alloy. The insulating coating 12 is made of an insulating resin.

In this example, the conductor core wire 11 is configured by twisting seven strands 13, as shown in FIG. 2(b). Hereinafter, for convenience of explanation, of the seven strands 13, those located on the outer periphery of the conductor core wire 11 (those visible from the outside of the conductor core wire 11) are referred to as "outer strands 13", and the outer periphery of the conductor core wire 11 Those that are not located in the conductor core wire 11 (those that cannot be visually recognized from the outside of the conductor core wire 11) are called “inner wires 13”. In this example, one strand 13 corresponds to the inner strand 13 and six strands 13 correspond to the outer strand 13 . The six outer strands 13 are positioned around the inner strand 13 at equal intervals (at equal angles of 60 degrees) in the circumferential direction. In addition, such a conductor core wire 11 can be formed, for example, by winding six wires 13 around one wire 13 extending linearly.

Next, the terminal 20 will be explained. In this example, the terminal 20 is formed by press working, bending, etc., on a metal plate material in which the surface of a conductive metal plate (eg, copper plate, copper alloy) as a base material is covered with a plating material (plating layer). is formed by applying As shown in FIG. 1, the terminal 20 integrally includes a terminal connection portion 30, a conductor pressure contact portion 40, and a connecting portion 50 that connects the terminal connection portion 30 and the conductor pressure contact portion 40 in the front-rear direction. The terminal connection portion 30, the connecting portion 50, and the conductor pressure contact portion 40 are arranged in this order in a line along the front-rear direction from the front side toward the rear side.

The terminal connection portion 30 is a portion of the terminal 20 that is connected to the mating terminal, and in this example, has a rectangular cylindrical shape extending in the front-rear direction. The conductor pressure contact portion 40 is a portion to which the conductor core wire 11 at the tip of the electric wire 10 is connected by pressure contact. Two press-contact blades 41 are provided in the conductor press-contact portion 40 so as to be spaced apart in the front-rear direction. The two press contact blades 41 have the same shape in this example.

As shown in FIG. 2A, each pressure contact blade 41 includes a pair of pressure contact portions 42 extending vertically with a gap (slot width) W in the width direction, and a pair of pressure contact portions 42 extending in the width direction at the upper end of the pair of pressure contact portions 42 . It is composed of a pair of blade portions 43 provided at inner corners and a base portion 44 connecting the lower ends of the pair of pressure contact portions 42 in the width direction. The slot width W is smaller than the outer diameter of the conductor core wire 11 of the electric wire 10 . The pair of blades 43 functions to cut open the insulating coating 12 of the electric wire 10, and the pair of pressure contact parts 42 functions to clamp and press the conductor core 11 of the electric wire 10 exposed from the cut portion of the insulating coating 12. In the above, each member which comprises the electric wire 1 with a terminal was demonstrated.

Next, a method for manufacturing the electric wire 1 with terminal according to the embodiment of the present invention will be described with reference to FIG. In this manufacturing method, first, the electric wire 10 is arranged above the terminal 20 . As a first step, as shown in FIG. 3A, for each of the two pressure contact blades 41, the tip of the electric wire 10 (the portion where the conductor core wire 11 remains covered with the insulating coating 12) is removed from above by: It is pushed downward between the pair of pressure contact portions 42 . Note that the tip portion of the electric wire 10 may be pushed downward between the pair of blade portions 43 .

As a result, the insulation coating 12 is cut by the pair of blade portions 43 of each pressure contact blade 41, and the conductor core wire 11 exposed from the cut portion of the insulation coating 12 (hereinafter referred to as "first cut portion") is cut. While sandwiched between the pair of pressure contact portions 42 in the width direction, it is in pressure contact with the pair of pressure contact portions 42 (see FIG. 3B). In the example shown in FIG. 3B, of the seven strands 13 constituting the conductor core wire 11, the two outer strands 13 (hereinafter referred to as "strands 13a") located at both ends in the width direction are It is exposed from the first cut portion of the insulating coating 12 and is in pressure contact with the pair of pressure contact portions 42 .

Next, as the first half of the second step, as shown in FIG. 3(c), for each of the two pressure contact blades 41, the tip of the wire 10 is pulled upward to a position above the pair of blades 43, With the insulating coating 12 of the electric wire 10 separated from the pair of blades 43, the electric wire 10 is rotated by 90 degrees around the axis. As a result, as shown in FIG. 3(d), for each pressure contact blade 41, the two strands 13a exposed from the first cut portion of the insulation coating 12 are positioned at both ends of the conductor core wire 11 in the vertical direction. The lower strand 13a of the upper and lower strands 13a faces the base portion 44. As shown in FIG. The rotation angle around the axis of the electric wire 10 is not limited to 90 degrees, and may be any rotation angle that allows a portion of the lower strand 13a exposed from the first cut portion to face the base portion 44. .

Then, as the second half of the second step, as shown in FIG. downwards. As a result, the insulating coating 12 of each press contact blade 41 is newly cut by the pair of blade portions 43, and the insulating coating 12 is exposed from the newly cut portion (hereinafter referred to as “second cut portion”). The conductor core wire 11 is sandwiched between the pair of pressure contact portions 42 in the width direction and press-contacts with the pair of pressure contact portions 42 (see FIGS. 3(f) and 4). Thus, the attachment of the terminal 20 to the electric wire 10 is completed, and the electric wire 1 with terminal is obtained.

In the example shown in FIGS. 3(f) and 4, among the seven strands 13 constituting the conductor core wire 11, four outer strands 13 (hereinafter referred to as "strands 13b") located at both ends in the width direction ) are exposed from the second cut portion of the insulating coating 12 and are in pressure contact with the pair of pressure contact portions 42 . Furthermore, the lower strand 13a of the two upper and lower strands 13a is exposed from the first cut portion and is in pressure contact with the base portion 44 . As described above, in the electric wire 1 with a terminal, the conductor core wire 11 is in conductive contact with not only the pair of pressure contact portions 42 but also the base portion 44 . Therefore, the contact area between the conductor core wire 11 and the pressure contact blade 41 can be increased as compared with the conventional electric wire with a terminal described above.

When each wire 13 constituting the conductor core wire 11 is made of aluminum or an aluminum alloy, an oxide film with low conductivity is likely to be formed on the outer surface of each wire 13 . In this regard, in this manufacturing method, in the first step, when the first cut portion of the insulating coating 12 is torn by the pair of blade portions 43, the outer surfaces of the two strands 13a exposed from the first cut portion The oxide film formed on the blade portion 43 may be broken or embrittled by friction with the blade portion 43 . Similarly, in the latter half of the second step, when the pair of blades 43 cuts the second cut portion of the insulating coating 12, the outer surfaces of the four strands 13b exposed from the second cut portion are formed. The oxide film that has been formed may be broken or embrittled by friction with the blade portion 43 . Therefore, in the state shown in FIGS. 3(f) and 4, the four strands 13b and the pair of press-contact portions 42 can be in contact with each other substantially without an oxide film interposed therebetween, and the lower strand 13a can contact with the base portion 44 substantially without an oxide film therebetween. Therefore, the conduction between the four strands 13b and the pair of pressure contact portions 42 and the conduction between the lower strand 13a and the base 44 can be properly ensured.

Furthermore, depending on the thickness of the wire 10, the slot width of the pair of pressure contact portions 42, and the rotation angle of the wire 10 in the process shown in FIG. There may be some portions where 12 is not cut open. However, as the electric wire 10 is pressed downward in the step shown in FIG. 3(e), the base 44 enters the cut portion of the insulating coating 12, and the breakage of the uncut portion progresses starting from the cut portion. It will be. Therefore, even if there remains a portion where the insulating coating 12 is not cut open, it does not substantially affect the expansion of the contact area described above. The same applies to the example shown in FIG. 5, which will be described later.

(action/effect)
As described above, according to the method for manufacturing the electric wire 1 with a terminal according to the present embodiment, in the first step, the electric wire 10 extends to the rear side (lower side) in the mounting direction to between the pair of blade portions 43 or between the pair of pressure contact portions 42 . ), a portion of the insulating coating 12 covering the conductor core wire 11 is cut open by the blade portion 43 . Next, in the first half of the second step, the electric wire 10 is rotated around the axis at a position on the near side (upper side) in the mounting direction than the blade portion 43 . This rotation directs the cut portion (first cut portion) of the conductor core wire 11 in the first step toward the base portion 44, and cuts a portion (second cut portion) different from the cut portion in the first step. It can be cut open later in the second half of the second step. By pushing the electric wire 10 until the conductor core wire 11 reaches the base portion 44, the conductor core wire 11 is brought into conductive contact with both the pressure contact portion 42 and the base portion 44, and the contact area between the conductor core wire 11 and the pressure contact blade 41 is reduced to the conventional value. can be larger than the wire with terminals of Therefore, the method for manufacturing the terminal-equipped wire 1 according to this embodiment can improve the reliability of the electrical connection between the terminal 20 and the wire 10 .

<Other forms>
The present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and can be modified, improved, etc. as appropriate. In addition, the material, shape, size, number, location, etc. of each component in the above-described embodiment are arbitrary and not limited as long as the present invention can be achieved.

For example, in the above embodiment, the terminal 20 is attached to the electric wire 10 through the process shown in FIG. On the other hand, the terminal 20 may be attached to the electric wire 10 through the process shown in FIG.

Specifically, in the modification shown in FIG. 5, as a first step, as shown in FIG. , is pushed downward between the pair of blades 43 from above. As a result, the insulating coating 12 is cut by the pair of blade portions 43 and the conductor core wire 11 exposed from the cut portion of the insulating coating 12 (hereinafter referred to as “first cut portion”) is cut by the pair of pressure contact portions 42 . While sandwiched in the width direction, it presses and contacts with the pair of pressure contact portions 42 (see FIG. 5(b)). In the example shown in FIG. 5B, of the seven strands 13 constituting the conductor core wire 11, the two outer strands 13 (hereinafter referred to as "strands 13a") positioned at both ends in the width direction are It is exposed from the first cut portion of the insulating coating 12 and is in pressure contact with the pair of pressure contact portions 42 .

Next, as the first half of the second step, as shown in FIG. 5C, while maintaining the vertical position of the electric wire 10, the pair of blades 43 cut into the insulating coating 12, and the axial line of the electric wire 10 is cut. Rotate around 90 degrees. As a result, as shown in FIG. 5(d), the insulating coating 12 is further torn continuously from the first cut point, and the further torn portion of the insulating coating 12 (hereinafter referred to as "second cut point") The conductor core wire 11 exposed from the contact portion 42 is sandwiched in the width direction by the pair of pressure contact portions 42 and pressed into contact with the pair of pressure contact portions 42 (see FIG. 5(d)). In the example shown in FIG. 5D, among the seven strands 13 forming the conductor core wire 11, the four outer strands 13 (hereinafter referred to as "strands 13b") located at both ends in the width direction are It is exposed from the second cut portion of the insulating coating 12 and is in pressure contact with the pair of pressure contact portions 42 . The two strands 13a exposed from the first cut portion of the insulating coating 12 are positioned at both ends in the vertical direction of the conductor core wire 11, and the lower strand 13a of the two upper and lower strands 13a is located at the base. Facing 44. Note that the rotation angle of the wire 10 about the axis may be an angle different from 90 degrees as long as a portion of the lower wire 13a exposed from the first cut portion faces the base portion 44.

Next, as the second half of the second step, as shown in FIG. 5E, the tip of the wire 10 is pushed downward using the jig 60 until the wire 10 contacts the base portion 44 . As a result, the four strands 13b located at both ends in the width direction are exposed from the second cut portions of the insulating coating 12 and are in pressure contact with the pair of pressure contact portions 42 . Furthermore, the lower strand 13a of the two upper and lower strands 13a is exposed from the first cut portion and is in pressure contact with the base portion 44 . Thus, the attachment of the terminal 20 to the electric wire 10 is completed, and the electric wire 1 with terminal is obtained.

Thus, in the modification shown in FIG. 5 as well, the conductor core wire 11 is in conductive contact with not only the pair of pressure contact portions 42 but also the base portion 44, as in the above-described embodiment shown in FIG. Therefore, the contact area between the conductor core wire 11 and the pressure contact blade 41 can be increased as compared with the conventional electric wire with a terminal described above.

Furthermore, in the above-described embodiment, the terminal 20 integrally includes the terminal connecting portion 30, the conductor pressure contact portion 40, and the connecting portion 50. As shown in FIG. On the other hand, as shown in FIG. 6, the terminal 20 may be a joint terminal having only the conductor press-contact portion 40 . In the example shown in FIG. 6, the conductor press-contact portion 40 of the terminal 20 has two press-contact blades 41A connected by a connecting portion 45 so as to be separated from each other in the front-rear direction. The two pressure contact blades 41B are provided to extend forward and are connected to each other by a connecting portion 45 so as to be spaced apart in the front-rear direction. there is

In the example shown in FIG. 6, a first wire 10A having a conductor core wire 11 is pressed and held by two pressure contact blades 41A, and a second wire 10B having a conductor core wire 11 is pressure contacted and held by two pressure contact blades 41B. By being held, the first electric wire 10A and the second electric wire 10B are conductively connected. In this case also, the terminal 20 (conductor pressure contact portion 40) is attached to the first electric wire 10A and the second electric wire 10B through the process shown in FIG. 3 or the process shown in FIG. Excellent electrical conductivity between the terminal 20 (conductor pressure contact portion 40) and the first electric wire 10A and the second electric wire 10B.

Here, the features of the embodiment of the method for manufacturing the electric wire 1 with terminal according to the present invention described above are briefly summarized in [1] to [4] below.
[1]
A method for manufacturing a terminal-attached wire (1) in which a terminal (20) is attached to the wire (10), comprising:
The electric wire (10) is
Having a conductor core wire (11) and an insulating coating (12) covering the conductor core wire (11),
The terminal (20) is
A pair of pressure contact portions (42) extending in the mounting direction of the terminal (20) and the electric wire (10) and press-contacting with the conductor core wire (11) sandwiched therebetween, and the mounting direction of the pair of the pressure contact portions (42). A pair of blade portions (43) provided on the front side to cut open the insulating coating (12) when the electric wire (10) is attached, and a pair of blade portions (43) provided on the back side in the attachment direction of the pair of pressure contact portions (42) and the a base portion (44) connecting the pair of pressure contact portions (42);
The manufacturing method is
The electric wire (10) is passed between the pair of blades (43) or between the pair of blades (43) to between the pair of pressure contact parts (42) on the far side in the mounting direction. A first step of cutting open a part of the insulating coating (12) in the circumferential direction by pushing it toward the
The electric wire (10) that has undergone the first step is held at a position on the front side in the mounting direction with respect to the pair of pressure contact portions (42) at a predetermined angle (90 in this example) around the axis of the electric wire (10). degrees);
The electric wire (10) that has undergone the second step is pushed in toward the inner side in the mounting direction until the conductor core wire (11) reaches the base portion (44), so that the insulation coating (12) is surrounded. Second, the conductor core wire (11) is brought into conductive contact with the base (44) and the pair of press-contact portions (42) through the cut open portion and the other portion. comprising a process and
A method for manufacturing an electric wire with a terminal.
[2]
In the production method described in [1] above,
In the second step,
The electric wire (10) is cut at the predetermined angle (90 degrees in this example) so that at least a part of the cut portion produced by cutting the insulating coating (12) in the first step faces the base (44). ) about said axis,
A method for manufacturing an electric wire with a terminal.
[3]
In the production method according to [1] or [2] above,
In the second step,
With the electric wire (10) pulled back to a position on the nearer side in the mounting direction than the pair of blades (43), and the insulation coating (12) being separated from the pair of blades (43), rotating the wire (10) about the axis;
A method for manufacturing an electric wire with a terminal.
[4]
In the production method according to [1] or [2] above,
In the second step,
When the electric wire (10) is pushed between the pair of blades (43) in the first step, the pair of blades (43) are in contact with the insulating coating (12). In this state, the electric wire (10) is rotated around the axis, and when the electric wire (10) is pushed between the pair of pressure contact portions (42) in the first step, , the electric wire (10) is pulled back between the pair of blades (43), and the wire (10) is in contact with the insulating coating (12) with the pair of blades (43) ) about said axis,
A method for manufacturing an electric wire with a terminal.

REFERENCE SIGNS LIST 1 electric wire with terminal 10 electric wire 11 conductor core wire 12 insulation coating 20 terminal 41 pressure contact blade 42 pressure contact portion 43 blade portion 44 base

Claims (4)

A method for manufacturing an electric wire with a terminal for manufacturing an electric wire with a terminal in which a terminal is attached to the electric wire, comprising:
The electric wire is
having a conductor core wire and an insulating coating covering the conductor core wire,
The terminal is
a pair of pressure contact portions extending in the direction in which the terminal and the wire are attached and press-contacting with the conductor core sandwiched therebetween; A pressure contact blade having a pair of blade portions for cutting and opening, and a base portion provided on the back side of the pair of pressure contact portions in the mounting direction and connecting the pair of the pressure contact portions,
The manufacturing method is
By pushing the electric wire toward the back side in the mounting direction to between the pair of blade portions or between the pair of pressure contact portions via between the pair of blade portions, the insulation coating is removed. A first step of cutting open a part in the circumferential direction;
After the wire that has undergone the first step is rotated by a predetermined angle around the axis of the wire at a position closer to the mounting direction than the pair of pressure contact portions, the conductor core wire reaches the base. By pushing it in toward the back side in the mounting direction until it reaches the point where it is attached, the other part of the insulating coating in the circumferential direction is cut open, and the conductor core wire is connected to the base part and the pair of the conductor core wires through the cut open part and the other part. and a second step of making conductive contact with the pressure contact portion of
A method for manufacturing an electric wire with a terminal. In the manufacturing method according to claim 1,
In the second step,
Rotate the electric wire about the axis by the predetermined angle so that at least a part of the cut portion generated by cutting the insulating coating in the first step faces the base.
A method for manufacturing an electric wire with a terminal. In the manufacturing method according to claim 1 or claim 2,
In the second step,
The wire is pulled back to a position on the front side in the mounting direction relative to the pair of blades, and the wire is rotated around the axis in a state in which the insulating coating is separated from the pair of blades.
A method for manufacturing an electric wire with a terminal. In the manufacturing method according to claim 1 or claim 2,
In the second step,
When the electric wire is pushed between the pair of blade portions in the first step, the electric wire is pushed into the axial line while the pair of blade portions are in contact with the insulating coating. When the electric wire is pushed between the pair of pressure contact portions in the first step, the electric wire is pulled back between the pair of blade portions to push the pair of blade portions. is in contact with the insulating coating, rotating the wire around the axis;
A method for manufacturing an electric wire with a terminal.

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