JP2007012341A - Manufacturing method for electric wire with terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for an electric wire with a terminal by which elongation or getting thin of a core wire calked with a crimping piece of the terminal at the time of carrying out crimping connection of the terminal to the electric wire is prevented, breaking or coming-off of the electric wire is suppressed, and stable electric contact and adherence of the electric wire can be obtained. <P>SOLUTION: The manufacturing method for the electric wire with the terminal relates to a method in which the electrically conductive terminal 20 is connected to the end of the electric wire 10, consisting of a core wire 12 made of electrically conductive strands and an insulation covering 14 covering the core wire 12. When the naked core wire 12 of the end of the electric wire is crimped on both sides with at least a pair of crimping pieces 26a and 26b in order to achieve the crimping connection, the crimping connection is carried out in the state that the axial elongation of a core wire end surface 12a of the core wire 12 in an axial direction of the core wire is regulated by making a core wire pressor 70 contact closely to the core wire end surface 12a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method of manufacturing an electric wire with a terminal, and more specifically, when a terminal is crimped and connected to a core wire that is exposed at a terminal portion of the electric wire via a crimping piece, by crimping the core wire with the crimping piece of the terminal. The present invention relates to a method of manufacturing a terminal-attached electric wire that effectively prevents a core wire from extending in an axial direction.

  In recent years, electric and electronic devices mounted on automobiles have increased in variety, and high performance and multi-function have been rapidly promoted. Electric wires connected with terminals are connected to these individual devices via connectors, and signal transmission and power supply are performed via these electric wires with terminals. These multiple wires are routed in the engine room in the state of a combined wire harness, but contact failure may occur due to disconnection of wires or disconnection from terminals due to bending or pulling due to vibration or the like. Are known. On the other hand, the improvement in the connection reliability of these electric wires and terminals is requested | required with performance improvement of an apparatus.

  FIG. 5 shows a perspective view before the terminal 20 is connected to the conventional general electric wire 10, and FIG. 6 shows a process of crimping the terminal 20 to the electric wire 10 along a section CC in FIG. It is shown by the arrow view of. The electric wire 10 has a core wire 12 covered with an insulating covering material 14, and a terminal 20 connected to such an electric wire 10 is in contact with an unillustrated counterpart terminal to establish electrical continuity. A pair of crimping pieces 26a, 26b for sandwiching and caulking and electrically connecting the core wire 12 of the electric wire 10 with the portion 22; and a covering material for the electric wire 10; A pair of crimping pieces 28 a and 28 b for caulking 14 to fix the terminal 20 to the electric wire 10 is composed of a covering crimping portion 28 provided on both sides of the base portion 24.

  As shown in FIG. 6A, the electric wire 10 whose tip is peeled off is placed on the core wire crimping portion 26 of the terminal 20 and the base portion 24 of the covering crimping portion 28. The core wire side anvil 40 and the crimper 30 are disposed above and below the core wire crimping portion 26, and the covering side anvil 60 and the crimper 50 are disposed above and below the covering crimping portion 28. When the core wire side crimper 30 and the covering side crimper 50 are lowered synchronously, as shown in FIG. 6B, the crimping pieces 26 a and 26 b of the core wire crimping portion 26 of the terminal 20 and the crimping pieces 28 a of the covering crimping portion 28. 28b is led to the inner side wall of the crimpers 30 and 50, and is bent so as to wrap the electric wire. The crimpers 30 and 50 continue to descend further, and as shown in FIG. 6C, the crimping pieces 26a and 26b of the core wire crimping portion 26 and the crimping pieces 28a and 28b of the covering crimping portion 28 are connected to the core wire 12 and the sheath 14 of the electric wire 10. The terminal 20 is connected to the electric wire 10 by caulking.

  Generally, when connecting a terminal to such an electric wire, in order to obtain a predetermined fixing force, the crimp height (C / H) is set so that the cross-sectional area of the core wire is about 70% to 80% before crimping. ) And crimp width (C / W). However, as shown in FIG. 6D, in practice, the core wire 12 crimped by the core wire crimping portion 26 of the terminal 20 is crushed, and the element wire itself of the core wire 12 is pushed out in the axial direction of the electric wire 10. It will grow. Further, when the core wire 12 is crushed and extended by the core wire crimping portion 26, the core wire 12 on the distal end side from the core wire crimping portion 26 expands and warps. As shown in FIG. 6 (e), according to the DD cross section of the core wire crimping portion 26, the core wire is thinned, so that a gap is formed between the core wire and the terminal and between the core wires. You can see that it has occurred. Thus, when the core wire 12 is thinned by the core wire crimping portion 26, the electrical connection is deteriorated, the contact resistance is increased, the predetermined fixing force cannot be obtained, and the mechanical strength is weakened. is there.

  On the other hand, for example, a terminal crimping device described in Japanese Patent Application Laid-Open No. 7-14658 (Patent Document 1) is provided with a pressing part for pressing a core wire protruding from the crimping piece to the crimper for the core wire. is there. Thereby, the core wire which protruded from the core wire crimping portion to the tip side of the electric wire is prevented from warping, and the problem in mounting the terminal-attached electric wire to the housing is solved.

  Further, the terminal crimping device described in Japanese Patent Laid-Open No. 2003-168536 (Patent Document 2) is an improvement of the terminal crimping device described in Patent Document 1, and the front end side of the electric wire from the crimping piece at the pressing portion. In order to solve the problem that a gap is likely to be generated between the core wire and the core wire crimping piece by pressing the protruding core wire, the pressurizing portion that holds the core wire is replaced with a crimping portion that crimps the crimping piece of the terminal. It is provided on the same surface.

  However, the devices described in Patent Literature 1 and Patent Literature 2 prevent warping of the tip of the core wire, and for the problem that the core wire is stretched and thinned by caulking by the crimping piece of the core wire crimping portion of the terminal. There is no effect.

  In addition, it is difficult to inspect all the wire adhesion strength and electrical connection reliability after production, and the wire height is adjusted by adjusting the crimping height (C / H) and crimping width (C / W) during crimping in advance. Although the fixing force, contact resistance, etc. are managed, if the electric wire becomes thin during crimping, the contact resistance value and the electric wire fixing force tend to vary.

Japanese Patent Laid-Open No. 7-14658 JP 2003-168536 A

  Accordingly, the problem to be solved by the present invention is that when the terminal is crimped and connected to the electric wire, the core wire crimped by the crimping piece of the terminal is not stretched or thinned, the electric wire is not easily cut or pulled out, and stable electrical It is providing the manufacturing method of the electric wire with a terminal which can obtain a contact and electric wire adhering force.

  In order to solve the above-mentioned problem, the method for manufacturing a terminal-attached electric wire according to claim 1 of the present invention is such that a core wire made of a conductive wire is electrically conductive at an end portion of the electric wire covered with an insulating covering material. In the method of manufacturing a terminal-attached electric wire for connecting the terminal, a core wire pressing member is attached to the end surface of the core wire when the core wire exposed by the wire terminal is sandwiched between at least a pair of crimp pieces provided in the terminal. The gist of the invention is to make crimp contact in a state in which the extension in the axial direction of the end face of the core wire is restricted.

  Further, in the method for manufacturing a terminal-attached electric wire according to claim 2 of the present invention, the core wire pressing member is integrally provided on the crimper, and the core wire of the electric wire terminal is crimped by a pair of crimp pieces of the terminal together with the anvil. 2. The method of manufacturing a terminal-attached electric wire according to claim 1, wherein the wire is brought into contact with the end face of the core wire substantially simultaneously.

  According to the method for manufacturing an electric wire with a terminal described in claim 1, when the core wire of the electric wire is clamped between crimping pieces provided in the core wire crimping portion of the terminal, the electric wire is brought into contact with the tip end surface of the core wire. Since the core wire pressing member that restricts the elongation of the core wire can be suppressed, the core wire can be prevented from being elongated and thinned during crimping. Therefore, in the core wire crimping portion, no gap is generated between the core wire and the terminal and between the core wires. Thus, since no gap is generated in the core wire crimping portion, the electrical connection between the core wire and the terminal is stable, and the contact resistance does not increase. In addition, since the core wire and its strands are not thinned, the strength of the core wire itself can be prevented from being reduced, and there is a problem that the strands of the core wire are cut by pulling or bending the wires. It becomes difficult to do. In addition, by setting the crimping height (C / H) and the crimping width (C / W), it is possible to reliably obtain a predetermined crimping state, so that it is easy to manage the wire fixing force, contact resistance, etc. Variations in product performance can be reduced.

  According to the method for manufacturing an electric wire with a terminal described in claim 2, since the core wire pressing member is provided integrally with the crimper, there is no need to process the terminal, and the conventional terminal is applied as it is. Thus, it is possible to suppress the core wire from being elongated and thinned during crimping. Therefore, in the core wire crimping portion, there is no gap between the core wire and the terminal, and between the core wires, so that the contact resistance between the core wire and the terminal can be easily changed by bending or pulling of the electric wire. Therefore, it is possible to provide an electric wire with a terminal having a stable electrical connection.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. In addition, the connection direction with the other party terminal (not shown) is demonstrated as a front side.

  As shown in FIG. 1, the electric wire 10 is formed by covering a core wire 12 formed by twisting a plurality of metal wires with a covering material 14 made of an insulating synthetic resin. The core wire 12 is exposed by skinning for a predetermined length.

  The terminal (in this case, female type) 20 is formed by bending a metal plate-like member, and includes a connecting portion 22, a base portion 24, and a core wire crimping portion 26 including crimping pieces 26a and 26b. And a covering crimping portion 28 composed of the crimping pieces 28a and 28b.

  The connecting portion 22 is formed in a substantially rectangular tube shape, and an elastic contact piece 22a is provided therein, and a distal end portion of a mating terminal (in this case, a male type) (not shown) is inserted. Electrically conducted. The base portion 24 extends from the rear end portion of the connection portion 22, and a pair of core wire crimping pieces 26 a for caulking and fixing the core wire 12 of the electric wire 10 on the left and right sides of the intermediate portion of the base portion 24. , 26b are erected upward to constitute the core wire crimping portion 26. In addition, a pair of covering crimping pieces 28a and 28b for caulking and fixing the covering 14 of the electric wire 10 are erected upward on the left and right sides of the rear end portion of the base portion 24. 28 is constituted.

  The core wire crimping pieces 26a and 26b provided in the core wire crimping portion 26 may be provided in at least one pair, and the number of pairs is not particularly limited. Moreover, although the terminal which has the crimping | compression-bonding pieces 28a and 28b for coating | cover was illustrated in the figure, the terminal of the type without the coating crimping | compression-bonding part 28 can also be used. Moreover, although the female-type thing was illustrated as a shape of the connection part 22, of course, a male-type shape may be sufficient.

  The core wire side crimper 30 and the core wire side anvil 40 are crimped by sandwiching the core wire crimping pieces 26a, 26b of the terminal 20 disposed between the core wire side crimper 30 and the core wire side anvil 40 by a pressing operation of a terminal crimping device (not shown). It is a connection jig for connecting the terminal 20 to the core wire 12 exposed at the terminal portion of the electric wire 10.

  The core wire side crimper 30 is for pressing the crimping pieces 26a, 26b of the core wire crimping portion 26 of the terminal 20 from above, and a crimping die 32 is formed on the lower end surface thereof. The crimping die 32 is formed with guiding portions 34a and 34b having an arch-shaped curved surface on its side surface, and a protruding portion 36 is formed near the center where the arches 34a and 34b are connected. The arch-shaped guide portions 34a and 34b guide the tips of the crimping pieces 26a and 26b for the core wire of the terminal 20 inward when the terminal 20 is sandwiched between the core wire-side crimper 30 and the core wire-side anvil 40. The protruding portion 36 winds the tips of the core wire crimping pieces 26a and 26b in the direction of the core wire 12. The core wire crimping portion 26 of the terminal 20 is further pressed by the core wire side crimper 30 and the core wire side anvil 40 to be connected to the core wire 12.

  On the other hand, the core wire side anvil 40 is for supporting the terminal 20 from below, and a curved portion 42 is formed on the upper end surface thereof in accordance with the curvature after caulking of the base portion 24 of the core wire crimping portion 26. .

  In addition, the covering side crimper 50 and the covering side anvil 60 are pressed and clamped by sandwiching the covering crimping portion 28 of the terminal 20 disposed between them, and connecting the terminal 20 to the terminal portion of the electric wire 10. The core wire side crimper 30 and the core wire side anvil 40 are formed slightly larger than the core wire 12 in accordance with the diameter of the coating 14 that is thicker than the core wire 12, and generally have the same configuration.

  That is, when the coating crimping portion 28 of the terminal 20 is sandwiched between the lower end surface of the coating-side crimper 50 and the coating-side anvil 60, the crimping for guiding the tips of the coating crimping pieces 28a, 28b to the inside. A mold 52 is formed, and a curved portion 62 is formed on the upper end surface of the covering side anvil 60 according to the curvature of the base portion 24 of the covering pressure bonding portion 28 after the pressure bonding.

  Further, a plate-shaped core wire pressing member 70 having a width substantially the same as the diameter of the core wire is provided adjacent to the center of the front surface of the core wire crimper 30. The core wire pressing member 70 is an electric wire placed on the core wire crimping portion 26 and the covering crimping portion 28 of the terminal 20 before the core wire crimping portion 26 is caulked by the core wire side crimper 30 and the core wire side anvil 40. When the core wire crimping portion 26 is caulked, the tip of the core wire 12 is prevented from extending forward.

  Next, the process of crimping and connecting the terminal 20 to the electric wire 10 will be described in order with reference to FIGS. FIG. 2A shows an AA cross section of the electric wire 10 and the terminal 20 shown in FIG. The electric wire 10 is placed on the base portion 24 of the terminal 20 so that the exposed core wire 12 is on the core wire crimping portion 26 of the terminal 20 and the covering material 14 is on the covering crimping portion 28. The core wire side crimper 30 and the anvil 40, and the covering side crimper 50 and the anvil 60 are arranged at positions facing each other with 20 therebetween.

  Subsequently, as shown in FIG. 2B, when the core wire side crimper 30 is lowered and the core wire crimping portion 26 and the covering crimping portion 28 of the terminal 20 are sandwiched between the core wire side anvil 40, The crimping pieces 26a, 26b for covering and the crimping pieces 28a, 28b for covering are guided by guide parts 34a, 34b forming an arch-shaped curved surface of the crimping mold 32 provided on the lower surface of the core wire side crimper 30 and wrap around the core wire 12. Go.

  At this time, the plate-shaped core wire pressing member 70 provided adjacent to the core wire side crimper 30 is lowered to a position where it contacts the end surface 12 a of the core wire 12. Since the core wire holding member 70 has substantially the same width as the core wire 12, the core wire holding member 70 can be lowered to the vicinity of the base portion 24 connecting the connection portion 22 of the terminal 20 and the core wire crimping portion 26 to cover the end surface 12 a of the core wire 12. It is possible to restrict the forward movement of the core wire end face 12a. The core wire pressing member is not limited to the above, but may be configured to be inserted between the connecting portion 22 and the core wire crimping portion 26 from the side, for example.

  Further, as shown in FIG. 2C, the core wire side crimper 30 and the covering side crimper 50 continue to descend, the core wire side anvil 40 and the covering side anvil 60 support the terminal 20 from below, and the core wire of the core wire crimping portion 26 The core wire 12 is clamped and crimped by the crimping pieces 26a and 26b for use, and the coating 14 is similarly clamped by the crimping pieces 28a and 28b of the coating crimping portion 28. At this time, since the plate-shaped core wire pressing member 70 is disposed so as to contact the end surface 12a of the core wire 12, the tip of the core wire 12 is compressed and pushed out by the core wire crimping portion 26 of the terminal and extends. There is no such thing, and the wire does not become thin.

  FIG. 2D is an arrow view showing a cross section in which the terminal 20 is connected to the tip of the electric wire 10, and FIG. 2E shows the BB cross section. As shown in FIG. 2D, the core wire 12 is compressed in the radial direction of the core wire 12 by being crimped to the core wire crimping pieces 26a and 26b of the terminal 20 as compared with the state before the crimping process. However, there is no extension toward the tip. In addition, since the core wire 12 does not extend away from the tip and escape, there is no thinning of the strand as shown in FIG. Therefore, in the core wire crimping portion 26, no gap is generated between the core wire 12 and the core wire crimping portion 26 of the terminal 20 and between the strands of the core wire 12.

  Since no gap is generated in the core wire crimping portion 26 in this way, the electrical connection between the core wire 12 and the terminal 20 is stable, and the contact resistance does not increase. In addition, since the core wire 12 and its strands do not become thinner than a predetermined compression rate, the strength of the core wire 12 itself can be prevented from being reduced, and the strands of the core wire 12 can be prevented from being pulled or bent. The problem that the wire is cut is less likely to occur. In addition, by setting the crimping height (C / H) and the crimping width (C / W), it is possible to reliably obtain a predetermined crimping state, so that it is easy to manage the wire fixing force, contact resistance, etc. Variations in product performance can be reduced.

  FIGS. 3A to 3D show the connection process of the terminal to the electric wire 10 according to the second embodiment of the present invention in a sectional arrow view.

  As shown in FIG. 3A, the electric wire 10 and the terminal 20a have substantially the same configuration as the first embodiment shown in FIGS. 1 and 2, and the core wire 12 is exposed by peeling off the tip. The electric wire 10 is placed on the core crimping portion 26 and the covering crimping portion 28 of the terminal 20a. The core side crimper 30 and the anvil 40, and the covering side crimper 50 and the anvil 60 are arranged to face each other with the terminal 20a interposed therebetween. And instead of the core wire pressing member 70 provided adjacent to the core wire side crimper 30 in the first embodiment, the core wire pressing member 70a is a part of the base portion 24 extending from the rear end of the connecting portion 22 of the terminal 20a. It is formed by cutting up.

  The core wire pressing member 70a is provided at the end 12a of the core wire 12 peeled off of the electric wire 10 placed on the terminal 20a in the vicinity of the center in the width direction of the base portion 24 between the connection portion 22 of the terminal 20a and the core wire crimping portion 26. Is provided at a position where it abuts the core wire, and has a height substantially equal to the crimping height (C / H) of the core wire crimping portion 26.

  Then, as shown in FIG. 3B, when the core wire crimper 30 is lowered and the core wire crimping portion 26 and the covering crimping portion 28 of the terminal 20a are sandwiched between the core wire side anvil 40, The crimping pieces 26 a and 26 b and the covering crimping pieces 28 a and 28 b wrap around the core wire 12.

  Further, as shown in FIG. 3C, the core wire side crimper 30 and the covering side crimper 50 continue to descend, and the core wire side anvil 40 and the covering side anvil 60 support the terminal 20a from below, and the core wire of the core wire crimping portion 26 The core wire 12 is clamped and crimped by the crimping pieces 26a and 26b for use, and the coating 14 is similarly clamped by the crimping pieces 28a and 28b of the coating crimping portion 28.

  At this time, since the core wire pressing member 70a is cut and raised at the base portion 24 so as to contact the end surface 12a of the core wire 12, the tip of the core wire 12 is compressed and pushed out by the core wire crimping portion 26 of the terminal. , It won't stretch and the strands won't get thinner.

  FIG. 3D is an arrow view showing a cross section in a state where the terminal 20 a is connected to the tip of the electric wire 10. Compared to the state before crimping, the core wire 12 is compressed in the radial direction of the core wire 12 by being crimped to the core wire crimping pieces 26a and 26b of the terminal 20a, but does not extend in the tip direction. . Moreover, since the core wire 12 does not extend away from the distal end and escapes, there is no thinning of the strands. Therefore, in the core crimping portion 26, between the core wires 12 and the terminals 20a and between the strands of the core wires 12 There is no gap between them.

  As described above, since no gap is generated in the core wire crimping portion 26, the electrical connection between the core wire 12 and the terminal 20a is stable, and the contact resistance does not increase. In addition, since the core wire 12 and its strands do not become thinner than a predetermined compression rate, the strength of the core wire 12 itself can be prevented from being reduced, and the strands of the core wire 12 can be prevented from being pulled or bent. The problem that the wire is cut is less likely to occur.

  Next, a third embodiment of the present invention will be described with reference to FIG.

  As shown in FIG. 4A, the electric wire 10 and the terminal 20b have substantially the same configuration as that of the second embodiment shown in FIG. 3, and the electric wire 10 with the core wire 12 exposed by peeling off the tip is shown. It is mounted on the core wire crimping part 26 and the covering crimping part 28 of the terminal 20b. The core side crimper 30 and the anvil 40, and the covering side crimper 50 and the anvil 60 are arranged to face each other with the terminal 20b interposed therebetween. The core wire side crimper 30 has a hole in the center thereof, and an auxiliary crimper 30 a that can be driven up and down can be provided in the hole in addition to the crimper 30.

  Further, in the second embodiment shown in FIG. 3, in place of the core wire pressing member 70a formed by cutting the base portion 24 of the terminal, in this third embodiment, the core wire pressing portion 70b is the core wire of the terminal 20b. The crimping portion 26 is bent at the front end edges of the core wire crimping pieces 26a, 26b.

  Then, as shown in FIG. 4B, when the core wire crimper 30 is lowered and the core wire crimping portion 26 and the covering crimping portion 28 of the terminal 20b are sandwiched between the core wire side anvil 40, The crimping pieces 26 a and 26 b and the covering crimping pieces 28 a and 28 b wrap around the core wire 12. Here, FIG. 4B shows a case where the auxiliary crimper 30a descends in synchronization with the core side crimper 30. Depending on the size and shape of the auxiliary crimper 30a, the auxiliary crimper 30a may be You may make it stay upwards at the time and descend at a later time.

  Further, as shown in FIG. 4C, the core wire side crimper 30 and the covering side crimper 50 continue to descend, and the core wire side anvil 40 and the covering side anvil 60 support the terminal 20b from below, and the core wire of the core wire crimping portion 26 The core wire 12 is clamped and crimped by the crimping pieces 26a and 26b for use, and the coating 14 is similarly clamped by the crimping pieces 28a and 28b of the coating crimping portion 28.

  At this time, since the core wire pressing member 70b is formed at the edge of the core wire crimping pieces 26a and 26b so as to contact the end surface 12a of the core wire 12, the tip of the core wire 12 is compressed by the core wire crimping portion 26 of the terminal. It is not pushed out and stretched, and the strands are not thinned.

  Thereafter, the auxiliary crimper 30a disposed at the center of the core wire side crimper 30 is lowered to a position that is one step lower than the core wire side crimper 30, as shown in FIG. The concave portion 27 is formed by caulking more strongly.

  FIG. 4E is an arrow view showing a cross section in a state where the terminal 20 b is connected to the tip of the electric wire 10. The core wire 12 is compressed in the radial direction, but does not extend in the tip direction. Further, since the core wire 12 does not extend in the distal direction, there is no thinning of the strands. Therefore, in the core wire crimping portion 26, between the core wire 12 and the terminal 20b and between the strands of the core wire 12. There is no gap.

  In addition, inside the recess 27 formed in the core wire crimping portion 26, the core wire 12 is more strongly caulked, and a more reliable electrical connection can be obtained by this recess. Unlike the other cases, the rear portion of the concave portion 27 is caulked and fixed by the core wire crimping portion 26, so that the impact caused by bending or pulling of the electric wire 10 is directly transmitted to the concave portion 27. Absent. Therefore, even if the strands constituting the core wire 12 inside the recess 27 become thin due to compression, there is little risk of cutting. Further, the contact surface between the inner wall of the core wire crimping portion 26 and the core wire 12 is caught by the concave portion 27, so that the core wire 12 is prevented from coming off.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. For example, in the first to third embodiments, an example of a terminal provided with a core crimping portion and a covering crimping portion has been shown, but it goes without saying that a terminal without a covering crimping portion may be used. Moreover, about the structure which provides the recessed part illustrated in 3rd Embodiment, you may add to any of the said 1st-3rd embodiment, and does not need to provide at all.

  In addition, the present invention is not limited to the modes shown in the first to third embodiments. In short, when caulking the core wire, a member that comes into contact with the end surface of the core wire is arranged so that the core wire extends in the axial direction. It is sufficient to have a configuration that regulates the above.

  The shielded electric wire with terminal according to the present invention can obtain a good crimped body of the core wire and the terminal, has stable contact resistance, and has high electrical connection reliability. It can be suitably used for a connector member of a precision instrument for manufacturing and its manufacture.

The state before the connection of the electric wire with a terminal concerning the 1st embodiment of the present invention is shown. 2A to 2E are cross-sectional arrow views showing the connection process of the electric wire with terminal according to the first embodiment of the present invention. FIGS. 3A to 3D are cross-sectional arrow views showing a connection process of the electric wire with terminal according to the second embodiment of the present invention. 4 (a) to 4 (e) are cross-sectional arrow views showing the connection process of the electric wire with terminal according to the third embodiment of the present invention. It is the perspective view which showed the state before the crimping | compression-bonding connection of the terminal to the conventional electric wire. FIG. 6 is a cross-sectional arrow view showing a process in which a terminal is crimped to the electric wire of FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electric wire 12 Core wire 12a Core wire end surface 14 Coating | covering material 20 Terminal 26 Core wire crimp part 26a, 26b Crimp piece for core wires
30 core wire side crimper 40 core wire side anvil 70 core wire pressing member 70a core wire pressing member 70b core wire pressing member

Claims (2)

  In a method of manufacturing a terminal-attached electric wire in which a conductive terminal is connected to an end portion of an electric wire in which a core wire made of a conductive element wire is covered with an insulating covering material, at least a pair of crimping pieces provided in the terminal When crimping and connecting with the core wire exposed from the end of the wire, the core wire pressing member is brought into contact with the end surface of the core wire so that the extension in the axial direction of the core wire end surface is regulated. The manufacturing method of the electric wire with a terminal characterized by the above-mentioned.   The core wire pressing member is provided integrally with the crimper so that when the core wire of the electric wire terminal is crimped by the pair of crimping pieces of the terminal together with the anvil, it is brought into contact with the end surface of the core wire substantially simultaneously. The manufacturing method of the electric wire with a terminal described in Claim 1 characterized by the above-mentioned.

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