WO2013057970A1

WO2013057970A1 - Terminal-equipped electrical wire, method for manufacturing terminal-equipped electrical wire, and terminal-crimping device

Info

Publication number: WO2013057970A1
Application number: PCT/JP2012/055645
Authority: WO
Inventors: 今井　正弘; 直之上田; 知宏柴田; 正幸川村
Original assignee: 住友電装株式会社
Priority date: 2011-10-21
Filing date: 2012-03-06
Publication date: 2013-04-25
Also published as: JP2013089554A

Abstract

The purpose of the present invention is to provide a technology whereby a wire-side end of a crimp-terminal base part on a terminal-equipped electrical wire is prevented from contacting and damaging surrounding electrical wires. Said terminal-equipped electrical wire comprises the following: an electrical wire wherein a core wire extends from the end of an insulating sheath; and a crimp terminal that has a core-wire-crimping part, which crimps the core wire, and a sheath-crimping part, which crimps the insulating sheath. The outside end, in the direction in which the electrical wire extends, of a base part of the aforementioned sheath-crimping part is provided with a protrusion that is formed so as to face inwards, towards the outer surface of the insulating sheath.

Description

Electric wire with terminal, manufacturing method of electric wire with terminal, and terminal crimping device

The present invention relates to a technique for crimping an electric wire to a terminal.

As a technique for crimping a terminal to an electric wire, for example, one described in Patent Document 1 is known.

In Patent Document 1, a plurality of crimp terminals connected in parallel by a connection band at a predetermined interval are the edges of the first lower mold on which the edge of the concave groove part that accommodates the connection band and the crimp part of the crimp terminal are placed. And are separated one by one. The crimping portion of the terminal is crimped to the electric wire by relatively moving the first lower mold and the first upper mold opposed to the first lower mold with respect to the separated crimp terminal.

JP 2008-153056 A

However, with the technique described in Patent Document 1, the protruding portion of the crimp terminal bottom formed by shearing, that is, the end of the crimp terminal bottom on the electric wire side may contact the surrounding electric wires and be damaged.

This invention is made in view of the said subject, and it aims at providing the technique which can suppress that the edge part by the side of the crimp terminal with which the electric wire with a terminal is equipped contacts the surrounding electric wire, and is damaged. .

A 1st aspect is an electric wire with a terminal, Comprising: The crimping | compression-bonding which has the electric wire from which the core wire has extended from the edge part of insulation coating, the core wire crimping part which crimps | bonds the said core wire, and the coating crimping part which crimps | bonds the said insulation coating And a bottom portion of the covering crimping portion includes an inward portion that is formed inwardly toward the outer peripheral surface of the insulating coating at an outer end portion in the extending direction of the electric wire.

The second aspect is a terminal-attached electric wire according to the first aspect, wherein the inward portion bites into the outer peripheral surface of the insulating coating.

A 3rd aspect is an electric wire with a terminal concerning the 1st aspect or the 2nd aspect, Comprising: The said inward part has the said bottom part of the said covering crimping | compression-bonding part inward toward the outer peripheral surface of the said insulation coating. Has an inclined structure.

A fourth aspect is a terminal-attached electric wire according to any one of the first to third aspects, wherein the core wire and the crimp terminal are different metals, and the anticorrosive is at least the coated crimp. And an anticorrosion part formed by covering the part and the part of the insulating coating adjacent to the covering crimping part.

A fifth aspect is a terminal in which an electric wire having a core wire and an insulating coating covering the core wire is connected to a crimp terminal having a core wire crimping portion for crimping the core wire and a coated crimping portion for crimping the insulating coating. A method of manufacturing an attached electric wire, wherein (a) the step of peeling off the insulating coating at the end of the electric wire to expose the core wire to the outside, and (b) the core wire at the core wire crimping portion; A step of arranging the electric wire on the crimp terminal so as to be positioned at the coated crimp portion, (c) a step of crimping the core wire crimp portion and the coated crimp portion to the electric wire, and (d) the coated crimp portion. And processing at least an outer end portion in the extending direction of the electric wire inwardly toward the outer peripheral surface of the insulating coating.

The sixth aspect is a method for manufacturing a terminal-attached electric wire according to the fifth aspect, wherein the step (c) and the step (d) are performed simultaneously.

A seventh aspect is a terminal crimping apparatus for connecting an electric wire having a core wire and an insulating coating covering the core wire to a crimp terminal having a core wire crimping portion for crimping the core wire and a coated crimping portion for crimping the insulating coating. A first base portion on which the core wire crimping portion can be placed; a first pressing portion that is disposed above the first base portion and can press the core wire crimping portion downward; and the covering crimp portion. The second base part in which the part of the mounting surface of the covering crimping part is inclined upward at least in contact with the outer end part in the extending direction of the electric wire in the bottom part of the covering crimping part. And a second pressing part disposed above the second base part and capable of pressing the second pressure-bonding piece downward, and the first pressing part and the first base part are relatively moved toward and away from each other. And a driving mechanism for relatively moving the second pressing portion and the second base portion toward and away from each other. , Comprising a.

The eighth aspect is the terminal crimping apparatus according to the seventh aspect, wherein the mounting surface of the second base part is inclined with the end part on the first base part side facing down.

According to the first to eighth aspects, at least the outer end portion in the extending direction of the electric wire is formed inward toward the outer peripheral surface of the insulating coating in the bottom portion of the covering crimping portion. For this reason, it is difficult for the surrounding electric wires to come into contact with the end of the bottom of the coated crimping portion, and the surrounding electric wires can be prevented from being damaged.

Especially, according to the second aspect, the inward portion bites into the outer peripheral surface of the insulating coating. Therefore, it can suppress that the said inward part contacts a surrounding electric wire more reliably, and a surrounding electric wire is damaged.

In particular, according to the third aspect and the eighth aspect, the entire bottom of the covering crimping part is inclined inward toward the outer peripheral surface of the insulating covering. For this reason, the metal mold | die for processing into the structure which inclined the bottom part can be produced easily.

Particularly, according to the fourth aspect, the core wire and the crimp terminal are made of different metals, and at least the coated crimped portion and the insulating coating portion adjacent to the coated crimped portion are covered with the anticorrosive agent. Since the bottom part of the coated crimping part is provided with an inward part, the thickness of the anticorrosive applied to the outer part of the inward part can be increased as compared with the conventional part because the inward part is directed inward. For this reason, it can suppress that a crack is formed in a corrosion inhibitor.

In particular, according to the sixth aspect, the step of crimping the core crimping portion and the covering crimping portion to the electric wire and the step of processing the outer end portion inward among the bottoms of the covering crimping portion are performed simultaneously. Man-hours can be reduced in the manufacture of electric wires with terminals.

It is a side view which shows the electric wire with a terminal in this embodiment. It is a schematic plan view which shows the whole structure of a terminal crimping apparatus. It is a side view which shows a lower mold group and an upper mold group. It is a figure which shows the state which looked at the 1st lower mold | type and the 1st lower mold | type from the crimp terminal side along the extension direction of a crimp terminal. It is a figure which shows the state which looked at the 2nd lower mold | type and the 2nd lower mold | type from the crimp terminal side along the extension direction of a crimp terminal. It is a side view which shows the state just before cut | disconnecting a crimp terminal from the chain strip for crimp terminals. It is a side view which shows the edge part by the side of the base of the crimp terminal of the electric wire with a terminal in a modification.

Hereinafter, embodiments will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.

<1. Configuration of electric wire with terminal ＞
First, the electric wire 5 with a terminal according to the present embodiment will be described. The side view which shows the electric wire 5 with a terminal in this embodiment is shown by FIG. The terminal-attached electric wire 5 includes an electric wire 10, a crimp terminal 20, and an anticorrosion part 30.

The electric wire 10 includes a conductive core wire 12 and an insulating coating 13 formed of an insulating resin or the like that covers the periphery of the core wire 12. The core wire 12 is configured by, for example, twisting a plurality of strands 11.

When the electric wire 10 is crimped and connected to the crimping terminal 20, one end of the electric wire 10 is subjected to terminal processing such as peeling and processed so that the core wire 12 of a predetermined length is exposed to the outside. That is, the electric wire 10 has a structure in which the core wire 12 extends from the end of the insulating coating 13. Of the electric wire 10, the portion where the core wire 12 is exposed and the end of the insulating coating 13 connected to the portion are crimped by the crimp terminal 20, and the crimp terminal 20 and the electric wire 10 are connected.

The crimp terminal 20 is formed in a long shape extending in one direction by appropriately punching and bending a metal plate. More specifically, the crimp terminal 20 is formed in a long shape extending along the extending direction of the electric wire 10 in a state where the crimp terminal 20 is crimped to the electric wire 10. In addition, although the crimp terminal 20 which concerns on this embodiment is a female terminal, it is not restricted to this, The crimp terminal 20 may be a male terminal.

In the electric wire 5 with a terminal, the core wire 12 (element wire 11) of the electric wire 10 and the crimp terminal 20 are each made of a different metal. Specifically, the core wire 12 is an aluminum wire, that is, a wire material of a metal (aluminum or aluminum alloy) whose main component is aluminum. On the other hand, the crimp terminal 20 is a copper alloy member such as copper or brass, or a member obtained by tin plating or tin alloy plating in which silver, copper, bismuth or the like is added to tin. As described above, in this embodiment, the core wire 12 and the crimp terminal 20 are made of different metals, more specifically, metals having different standard electrode potentials. In addition, the core wire 12 and the crimp terminal 20 of the electric wire 10 are not restricted to the said metal, What is necessary is just a member which has electroconductivity.

The crimp terminal 20 is connected in order from the distal end side to the root side of the crimp terminal 20 when connected to the electric wire 10, the connection portion 21, the first connection portion 22, the core wire crimp portion 23, the second connection portion 24, and the covering. The crimping portion 25 has a configuration in which the crimping portion 25 is continuously provided in a straight line. Among these, the first connecting portion 22, the core wire crimping portion 23, the second connecting portion 24, and the covering crimping portion 25 correspond to the holding portion 28 of the electric wire 10.

The connecting portion 21 has a cylindrical shape, more specifically, a rectangular cylindrical structure, and is a portion that is connected to the mating terminal by fitting the mating terminal into the portion. A contact piece 215 that elastically deforms in contact with the mating terminal is provided inside the connection portion 21.

The 1st connection part 22 is a part which connects the connection part 21 and the core wire crimping | compression-bonding part 23. FIG. The bottom part 221 of the first connecting part 22 is arranged continuously with the bottom part 211 of the connecting part 21. Moreover, the cross-sectional shape perpendicular | vertical to the extension direction of the electric wire 10 is formed in the substantially U shape.

The core wire crimping portion 23 is provided on the bottom portion 231 arranged continuously to the bottom portion 221 of the first connecting portion 22, and on both sides of the bottom portion 231, and on the portion of the core wire 12 where the electric wire 10 is exposed together with the bottom portion 231. A pair of crimping

pieces

232a and 232b to be crimped is provided. The core wire crimping portion 23 is formed in an open barrel shape before the crimping, and a cross-sectional shape perpendicular to the extending direction of the electric wire 10 is formed in a substantially U shape. The pair of crimping

pieces

232a and 232b of the core wire crimping portion 23 are opposed to each other and have a structure that rises from the bottom portion 231 in one direction.

When the core wire crimping portion 23 is crimped, the crimping

pieces

232a and 232b are bent toward the bottom portion 231 side. Thus, the core wire 12 exposed at the end of the electric wire 10 is crimped with the bottom 231 and the crimping

pieces

232a and 232b gripped.

The 2nd connection part 24 is a part which connects the core wire crimping part 23 and the covering crimping part 25. The bottom part 241 of the second connecting part 24 is arranged so as to continue to the bottom part 231 of the core wire crimping part 23 and the bottom part 251 of the covering crimping part 25. Moreover, the cross-sectional shape perpendicular | vertical to the extension direction of the electric wire 10 is formed in the substantially U shape.

The covering crimping portion 25 is provided on the bottom portion 251 arranged continuously to the second connecting portion 24 and on both sides of the bottom portion 251, and a pair of crimping pieces 252 a to be crimped to the insulating coating 13 of the electric wire 10 together with the bottom portion 251. , 252b. The coated crimping portion 25 is formed in an open barrel shape before the crimping, and the cross-sectional shape perpendicular to the longitudinal direction is formed in a substantially U shape. The pair of crimping

pieces

252a and 252b of the covering crimping portion 25 are opposed to each other and have a structure that rises from the bottom portion 251 in one direction.

When the covering crimping part 25 is crimped, the crimping

pieces

252a and 252b are bent to the bottom 251 side. As a result, the portion of the insulating coating 13 of the electric wire 10 is crimped with the bottom 251 and the crimping

pieces

252a and 252b gripped.

The bottom portion 251 of the covering crimp portion 25 includes a protrusion 29 at the outer end in the extending direction of the electric wire 10 connected to the crimp terminal 20. The protruding portion 29 is formed so as to protrude from a portion of the bottom portion 251 at the base side with respect to a portion where the pair of crimping

pieces

252a and 252b are provided in a state where the crimping terminal 20 is crimped and connected to the electric wire 10. Such protrusions 29 are generated in the manufacturing process of the terminal-attached electric wire 5 and will be described in detail later.

The bottom portion 251 of the cover crimping portion 25 in the present embodiment has a structure in which the whole is inclined inward toward the outer peripheral surface of the insulating coating 13 adjacent to the cover crimping portion 25. That is, the entire bottom portion 251 corresponds to the inward portion in the present embodiment.

Since the bottom portion 251 is inclined in this way, the diameter of the wire crimping portion 25 on the insertion port 254 side is smaller than the diameter on the outlet port 255 side. That is, the covering crimping portion 25 has a structure in which the base side portion is closer to the outer peripheral surface side of the insulating coating 13 than in the past. For this reason, the protrusion 29 which is a part of the bottom portion 251 is also formed inward toward the outer peripheral surface of the insulating coating 13, continuing to the bottom portion 251. Here, the protrusion 29 is in a state of biting into the outer peripheral surface of the insulating coating 13.

Note that such an inclined structure of the bottom portion 251 does not have to be employed for the entire bottom portion 251 of the cover crimping portion 25, and may be employed only for the protrusion 29 that is a part of the bottom portion 251, for example. In this case, the protrusion 29 corresponds to an inward portion. The inward portion only needs to be formed inward toward the outer peripheral surface of the insulating coating 13 at least on the outer end portion in the extending direction of the electric wire 10 in the bottom portion 251.

In addition, in order to make an understanding easy, the inclination angle of the bottom part 251 and the protrusion 29 of the covering crimping part 25 shown in FIG. 1 are shown in an exaggerated manner than the actual covering crimping part 25.

Such a crimp terminal 20 is supplied to the terminal crimping apparatus 40 as a chain crimp terminal 200 (see FIG. 2). The chain-like crimp terminal 200 is configured such that a plurality of crimp terminals 20 are arranged in parallel at a predetermined interval on the crimp-terminal chain 200 a on the coated crimp part 25 side. Such chain-like crimp terminals 200 are sequentially fed into the terminal crimping device 40.

The anticorrosion part 30 is a part of the anticorrosive applied to the connection part between the crimp terminal 20 and the electric wire 10. When the core wire 12 is an aluminum wire as in the present embodiment, the standard electrode potential relationship between the metal material of the core wire 12 and the metal material of the crimp terminal 20 is greater than the standard electrode potential of the crimp terminal 20. The standard electrode potential of the core wire 12 is lower. Under such a relationship, if an aqueous electrolyte solution such as salt water adheres to the core wire 12 that contacts the crimp terminal 20, galvanic corrosion, which is a type of corrosion, easily occurs on the core wire 12 at the contact portion. For this reason, the anticorrosion part 30 is formed in the part where the core wire 12 is exposed to the outside and the part where the electrolyte aqueous solution may enter toward the contact part between the core wire 12 and the crimp terminal 20. Examples of such a portion where the electrolyte aqueous solution may enter include a gap between the coated crimping portion 25 and the portion of the insulating coating 13 covered with the coated crimping portion 25. Therefore, the anticorrosion part 30 is formed by covering at least the covering pressure-bonding part 25 and the insulating coating 13 adjacent to the base-side part of the covering pressure-bonding part 25 in order to close the gap. . That is, the outside of the bottom portion 251, particularly the portion outside the protrusion 29 is covered with the anticorrosive agent. In the present embodiment, the anticorrosion part 30 is formed so as to cover the outer peripheral part from the first connection part 22 to the end part of the insulating coating 13 in the extending direction of the electric wire 10. As the anticorrosive, for example, a polyamide resin or an epoxy resin is employed. In the case where there is no difference in standard electrode potential between the metal used for the crimp terminal 20 and the metal used for the core wire 12, the anticorrosion part 30 may not be formed.

<2. Overall configuration of terminal crimping device>
The overall configuration of the terminal crimping device 40 will be described. FIG. 2 is a schematic plan view showing the overall configuration of the terminal crimping device 40.

The terminal crimping device 40 includes a base 42, a movable support frame 44, a ram member 48, a terminal feed guide section 50, and a terminal feed mechanism section 54.

The base 42 is formed in a plate shape, and is fixed on a device base (not shown) in a substantially horizontal posture. Here, the base 42 is formed in a substantially rectangular plate shape.

The movable support frame 44 has a plate portion 45 erected in a substantially vertical posture with respect to the base 42 and a pair of guide frame pieces 46 fixed to one main surface (front side) of the plate portion 45. Yes. The pair of guide frame pieces 46 are fixed in a substantially vertical posture with respect to the base 42 and in a parallel posture with a predetermined interval therebetween. Moreover, the lower end part of a pair of guide frame piece 46 is spaced apart from the upper surface of the base 42, and the crimping | compression-bonding operation | work using the lower mold group 60 and the upper mold group 80 mentioned later is performed between these.

The ram member 48 is formed in a substantially rectangular parallelepiped shape that can be disposed between the pair of guide frame pieces 46. In particular, the width dimension thereof is narrower than the interval dimension between the pair of guide frame pieces 46 (here. Is slightly narrow). The ram member 48 is guided in a fixed posture between the pair of guide frame pieces 46 so as to be movable up and down between the raised position and the lowered position.

Further, above the ram member 48, an elevating drive mechanism portion 49 constituted by an actuator such as an air cylinder is disposed. The ram member 48 is lifted and lowered by receiving the driving force of the lifting drive mechanism 49 through the rod 49a. That is, as will be described later, the elevating drive mechanism 49 moves the core wire crimping portion 23 and the covering crimping portion 25 in proximity so that they are crimped between the upper die group 80 and the lower die group 60. It is configured.

The first upper mold 84 and the second upper mold 90 are attached to the lower portion of the ram member 48 as a part of the upper mold group 80. Further, as a part of the lower die group 60, the first upper die 84 and the second upper die 90 are positioned on the upper surface of the base 42 and below the ram member 48. A lower mold 64 and a second lower mold 70 are attached.

As the ram member 48 is moved up and down, the first upper mold 84 and the second upper mold 90 move toward and away from the first lower mold 64 and the second lower mold 70. These configurations will be described in detail later.

The terminal feed guide portion 50 is formed in a substantially plate shape. Inside the terminal feed guide portion 50, a crimp terminal feed guide port 51 is formed through which the chain-like crimp terminal 200 can be guided. The terminal feed guide portion 50 is attached to the base 42 in such a posture that the crimp terminal feed guide port 51 is disposed along the direction connecting one side of the terminal crimping device 40 and the lower mold group 60. It is fixed directly or indirectly.

The terminal feed mechanism section 54 lowers the crimp terminals 20 constituting the chain-like crimp terminal 200 in the crimp terminal feed guide port 51 one by one for each terminal crimping operation of the lower mold group 60 and the upper mold group 80. It is configured to feed toward the group 60. Specifically, the terminal feeding mechanism portion 54 is configured by a mechanism that feeds the chain crimp terminals 200 one by one with an actuator such as an air cylinder. More specifically, since one sliding distance of the actuator corresponds to the distance between the crimp terminals 20 of the chain-like crimp terminal 200, the crimp terminals 20 are fed one by one by the operation of the actuator.

<3. Configuration of crimping part of terminal crimping device>
The structure of the crimping part by this terminal crimping apparatus 40 is demonstrated in detail. FIG. 3 is a side view showing the lower mold group 60 and the upper mold group 80.

As described above, the lower mold group 60 is attached to the upper surface of the base 42, and the upper mold group 80 is attached to the lower part of the ram member 48. And between these, the crimp terminal 20 is arrange | positioned with a predetermined attitude | position, and the edge part of the electric wire 10 is arrange | positioned with the predetermined direction with the axial direction aligned with the extending direction of the crimp terminal 20. In this state, the core wire crimping portion 23 and the covering crimping portion 25 are crimped.

The lower mold group 60 includes a crimp terminal cut portion 61, a first lower mold 64, and a second lower mold 70 in the order in which the crimp terminal 20 and the electric wire 10 extend from the electric wire 10 side toward the distal end side of the crimp terminal 20. It has. Among the above, the first lower mold 64 and the second lower mold 70 are fixed to the base 42 at fixed positions. The crimp terminal cut portion 61 is supported by a guide member (not shown) so as to be movable up and down with respect to the base 42, and is urged upward with respect to the base 42 by a biasing member 61S such as a coil spring. .

In addition, the upper mold group 80 includes, in the order in which the crimp terminal 20 and the electric wire 10 extend, in the order from the electric wire 10 side to the distal end side of the crimp terminal 20, the first cut holding portion 81, the first upper mold 84, and the second. An upper mold 90 is provided. Further, the upper mold group 80 has a wire holding portion 82 at substantially the same position as the first cut holding portion 81 in the extending direction of the crimp terminal 20 and the electric wire 10. Among these, the wire retainer 82, the first upper mold 84 and the second upper mold 90 are fixed to the ram member 48 at fixed positions.

Here, the upper and lower correspondence relationship of each member and the correspondence relationship of the crimp terminal 20 will be described.

The crimp terminal cut portion 61 is a position corresponding to the crimp terminal chain 200a, the electric wire 10 on the basis of the electric wire 10, and extends outward from the coated crimp portion 25. It is arranged at a position below the insulating coating 13 portion. In addition, a first cut presser portion 81 and an electric wire presser portion 82 are disposed above this.

The first lower mold 64 is disposed at a lower position of the cover crimping portion 25 of the crimp terminal 20, and the cover crimping portion 25 can be placed on the upper surface 64 a of the first lower mold 64. A first upper mold 84 is disposed at the upper facing position.

Further, the second lower mold 70 is disposed below the core wire crimping portion 23, and the core wire crimping portion 23 can be placed on the upper surface 70 a of the second lower mold 70. A second upper mold 90 is disposed at an upper facing position of the second lower mold 70.

Each component of the lower mold group 60 and the upper mold group 80 will be described for each function. First, the first lower mold 64 and the first upper mold 84 will be described. FIG. 4 is a diagram illustrating a state in which the first lower mold 64 and the first upper mold 84 are viewed from the crimp terminal 20 side along the extending direction of the crimp terminal 20.

A recessed groove 84a is formed at a position below the first upper mold 84 and facing the upper surface 64a of the first lower mold 64. The uppermost part of the concave groove 84a is formed in a semicircular cylindrical circumferential surface that curves in a semicircular arc shape.

The upper surface 64a of the first lower mold 64 is formed in a shallow groove shape having a longitudinal cross-sectional shape curved in an arc shape, and the entire surface of the bottom portion 251 of the covering crimping portion 25 can be placed and crimped. Further, the upper surface 64a of the first lower mold 64 is configured as an inclined surface in which the end on the crimp terminal cut portion 61 side is located above and the end on the second lower mold 70 side is located below. An edge portion 64e is provided at the upper end of the upper surface 64a.

Note that the entire upper surface 64a is not necessarily inclined. It suffices that at least a portion of the upper surface 64a that contacts at least the outer end portion in the extending direction of the electric wire 10 in the bottom portion 251 of the covering crimp portion 25 has a structure inclined upward. That is, it is only necessary that a part of the upper surface 64a on the crimp terminal cut portion 61 side is inclined upward.

Next, the second lower mold 70 and the second upper mold 90 will be described. FIG. 5 is a view showing a state in which the second lower mold 70 and the second upper mold 90 are viewed from the crimp terminal 20 side along the extending direction of the crimp terminal 20.

A concave groove 90a is formed at a position below the second upper mold 90 and facing the upper surface 70a. The upper surface 70a of the second lower mold 70 is formed in a shallow groove shape that is curved in an arc shape, and the core wire crimping portion 23 of the crimp terminal 20 can be placed on the upper surface 70a.

When connecting the crimp terminal 20 to the electric wire 10, first, the portion of the core wire 12 exposed to the outside of the electric wire 10 inside the core wire crimp portion 23, and the insulating coating 13 portion of the electric wire 10 inside the coated crimp portion 25, Each is arranged. Then, by bringing the first upper mold 84 close to the first lower mold 64 and the second upper mold 90 close to the second lower mold 70, the coating crimping part 25 is in the insulating coating 13, and the core wire crimping part 23 is in the core wire. 12 are respectively crimped.

At this time, since the surface of the concave groove 84a of the first upper mold 84 is formed along the extending direction of the electric wire 10, the upper surface of the coated crimping portion 25 after crimping is also along the extending direction of the electric wire 10. It is formed. On the other hand, since the upper surface 64a of the first lower mold 64 is inclined, the bottom portion 251 of the cover crimping portion 25 that is crimped while the upper surface 64a of the first lower mold 64 is in contact with the root side from the distal end side of the crimp terminal 20 It is deformed so as to be inclined inward toward the insulation coating 13.

Next, a configuration in which the crimp terminal 20 is separated from the crimp terminal chain 200a by the crimp terminal cut part 61, the first cut holding part 81, and the first lower mold 64 will be described.

FIG. 6 is a side view showing a state immediately before the crimp terminal 20 is separated from the crimp terminal chain 200a.

That is, the crimp terminal cut portion 61 is formed in a solid block shape, and a recessed groove portion 61g capable of accommodating the crimp terminal chain 200a is formed in a portion adjacent to the first lower mold 64 inside. Has been. The concave groove portion 61g is formed along the extension line of the crimp terminal feed guide port 51 of the terminal feed guide portion 50, and the crimp terminal chain of the chain-like crimp terminal 200 fed through the crimp terminal feed guide port 51 is formed. The band 200a is introduced into the main groove 61g.

The crimp terminal cut portion 61 is formed between the crimp terminal 20 and the crimp terminal chain band between the upper edge portion 61e of the opening of the concave groove portion 61g and the edge portion 64e located at the upper end of the upper surface 64a of the first lower mold 64. In order to pass through the portion between the first lower mold 64 and the first lower mold 64, the part between the first lower mold 64 and the first lower mold 64 can be moved up and down so as to pass in a manner capable of shearing.

Further, a substantially semi-cylindrical wire guide groove 61b is formed on the upper surface of the crimp terminal cut portion 61, and the electric wire 10 is placed on the wire guide groove 61b.

The first cut pressing portion 81 has a pressing protrusion 81 a that protrudes downward through the side of the electric wire 10. The presser protrusion 81a is in contact with the side portion of the wire guide groove 61b on the upper surface of the crimp terminal cut portion 61 before the core crimp portion 23 and the cover crimp portion 25 are crimped. The first cut presser 81 is formed to have a projecting dimension capable of lowering.

Further, the wire pressing portion 82 is supported so as to be movable up and down with respect to the first cut pressing portion 81 and is urged downward by an elastic member 82S such as a coil spring. Then, when or before the presser protrusion 81a of the first cut presser part 81 contacts the upper surface of the crimp terminal cut part 61, it comes into contact with the upper part of the electric wire 10 on the electric wire guide groove 61b, and the electric wire 10 is connected to the electric wire. It is held at a fixed position on the guide groove 61b.

The first crimping terminal 20 is disposed at predetermined positions on the upper surfaces of the first lower mold 64 and the second lower mold 70 while the crimp terminal chain 200a is disposed in the concave groove 61g. The ram member 48 is lowered to lower the upper mold 84. Then, the first cut presser 81 is lowered while the presser protrusion 81 a of the first cut presser 81 comes into contact with the upper surface of the crimp terminal cut 61. That is, in response to the driving force of the elevating drive mechanism 49 that lowers the first upper mold 84, the first cut presser 81 is also lowered. Then, a portion between the crimp terminal 20 and the crimp terminal chain 200a is sandwiched between the upper edge portion 61e of the recessed groove portion 61g and the edge portion 64e of the first lower mold 64 (see FIG. 6).

Here, since the upper surface 64a of the first lower mold 64 is inclined with the edge portion 64e located on the crimp terminal cut portion 61 side as the upper end, the sandwiched crimp terminal 20 and the crimp terminal chain 200a The portion between the two is also inclined along the inclination of the upper surface 64a. In such a state, the edge portion 64e and the upper edge portion 61e of the first lower mold 64 are sandwiched, and the portion between the crimp terminal 20 and the crimp terminal chain 200a is sheared and separated. The end portion of the bottom portion 251 that is the portion of the crimp terminal 20 that is separated and located outside the portion of the bottom portion 251 provided with the pair of

crimp pieces

252 a and 252 b corresponds to the protrusion 29. Thus, the protrusion 29 is formed in a structure inclined to the insulating coating 13 side.

Thereafter, the separated crimp terminal 20 is further lowered by the first upper mold 84 and the second upper mold 90, so that the core wire crimping portion 23 and the cover crimping are performed on the first lower mold 64 and the second lower mold 70. The part 25 is crimped. In this way, along the inclination of the upper surface of the first lower mold 64, the bottom portion 251 of the covering crimping portion 25 is deformed into a state in which the protrusion 29 is inclined most inward.

<4. Operation of terminal crimping device>
Operation | movement of the terminal crimping apparatus 40 comprised in this way is demonstrated. First, in the initial state, the ram member 48 is in a raised state (see FIG. 3). In this state, the chain-like crimp terminal 200 is fed through the crimp terminal feed guide port 51 of the terminal feed guide portion 50. The crimp terminal 20 is placed between the lower mold group 60 and the upper mold group 80 in a state where the core crimp part 23 is disposed on the second lower mold 70 and the coated crimp part 25 is disposed on the first lower mold 64. Arranged.

In this state, the operator arranges the end of the electric wire 10 between the lower mold group 60 and the upper mold group 80. In addition, the electric wire 10 has been subjected to terminal treatment in advance, and is in a state in which the insulating coating 13 at the end is removed and the core wire 12 is partially exposed to the outside. The operator places the exposed portion of the core wire 12 between the pair of crimping

pieces

232a and 232b of the core wire crimping portion 23 and the end of the insulating coating 13 between the pair of crimping

pieces

252a and 252b of the coating crimping portion 25. Like that.

In this state, the ram member 48 is lowered by driving the elevating drive mechanism 49. Then, first, the crimp terminal cut part 61 descends and the crimp terminal 20 is separated from the crimp terminal chain 200a. As a result, a protrusion 29 is formed at the end of the bottom 251 of the cover crimping portion 25.

At this time, the end portion of the insulating coating 13 of the electric wire 10 is held so as to be pressed by the electric wire pressing portion 82 on the crimp terminal cut portion 61.

When the ram member 48 is further lowered, the first upper mold 84 is further brought closer to the first lower mold 64, and the coating crimping portion 25 is crimped to the insulating coating 13 therebetween. Accordingly, the bottom portion 251 of the cover crimping portion 25 is a mode in which the base side portion of the crimp terminal 20, that is, the outer end portion in the extending direction of the electric wire 10 is inclined inward toward the outer peripheral surface of the insulating coating 13. Transforms into Thus, the process in which the coating crimping part 25 crimps the insulating coating 13 of the electric wire 10 and the process in which the bottom part 251 of the coating crimping part 25 is processed into an inclined structure are performed simultaneously. In the step of processing the bottom portion 251 into the inclined structure, at least the outer end portion of the bottom portion 251 of the covering crimping portion 25 in the extending direction of the electric wire 10 is processed inward toward the outer peripheral surface of the insulating coating 13. That's fine.

Further, since the second upper mold 90 is further closer to the second lower mold 70, the core wire crimping portion 23 is crimped to the core wire 12 between them. In this way, the crimp terminal 20 is connected to the electric wire 10.

Thereafter, the ram member 48 is raised by driving the elevating drive mechanism 49. Thereby, the crimp terminal 20 and the electric wire 10 connected integrally can be taken out from the terminal crimping apparatus 40. In conjunction with the rise of the ram member 48, the next crimp terminal 20 to be processed is supplied between the lower mold group 60 and the upper mold group 80.

The crimp terminal 20 and the electric wire 10 that are integrally connected by the approach of the second upper mold 90 and the second lower mold 70 are taken out of the terminal crimping device 40 and then coated with an anticorrosive agent. Thus, the anticorrosive part 30 is formed in the outer peripheral part from the 1st connection part 22 to the edge part of the insulation coating 13 in the extension direction of the electric wire 10 by performing the application | coating process of an anticorrosive. That is, the anticorrosion part 30 is formed so as to cover the outside of the bottom part 251, particularly the part outside the protrusion 29. Thereby, the contact portion between the crimp terminal 20 and the core wire 12 and the portion where the aqueous electrolyte solution may enter toward the contact portion between the crimp terminal 20 and the core wire 12 are covered with the anticorrosive agent.

As described above, in the electric wire with terminal 5 according to the present embodiment, the bottom portion 251 of the covering crimp portion 25 is formed inward toward the outer peripheral surface of the insulating coating 13 at the outer end portion in the extending direction of the electric wire 10. The protrusion 29 is provided. Since the projection 29 has a structure facing inward, that is, facing the outer peripheral surface of the insulating coating 13, it is possible to prevent other electric wires arranged around from coming into contact with the projection 29 and being damaged. At this time, since the protrusion 29 bites into the outer peripheral surface of the insulating coating 13, the protrusion 29 can be more reliably prevented from coming into contact with other surrounding electric wires.

If there is no inward portion at the bottom of the sheathed crimping part of the terminal-attached electric wire as in the prior art, the crimping terminal part separated between the crimping terminal chain and the crimping terminal, i.e. The part tends to be formed facing downward, that is, outward. More specifically, the cut-off portion is formed by shearing between the upper edge portion of the recessed groove portion of the crimp terminal cut portion and the edge portion of the first lower mold, when the crimp terminal cut portion is pushed downward. The Therefore, when the upper surface of the first lower mold is a substantially horizontal plane, the protrusion is pushed downward by the lowering of the crimp terminal cut portion including the upper edge portion, and therefore, the first lower mold is easily formed outward.

In the present embodiment, the upper surface 64a of the first lower mold 64 is inclined with the edge portion 64e positioned on the crimp terminal cut portion 61 side upward. For this reason, even if the protrusion 29 is pushed downward by the downward movement of the crimp terminal cut portion 61, the inward state is maintained along the upper surface 64 a of the first lower mold 64. That is, the protrusion 29 can be prevented from being formed outward.

It should be noted that the protrusion 29 is expected to bite into the outer peripheral surface of the insulating coating 13, thereby causing no problem.

Further, the aspect in which not only the protrusion 29 but also the entire bottom portion 251 of the covering crimping portion 25 is inclined is the surface of the mold that is in contact with the entire bottom portion 251 like the upper surface 64a of the first lower mold 64 in the present embodiment. It is realized by tilting. Therefore, it is possible to easily manufacture a mold for processing the bottom portion 251 into an inclined structure.

Further, since the protrusion 29 or the bottom portion 251 is formed inward, a space is provided in a portion where the protrusion 29 or the bottom portion 251 has been positioned so far. The thickness of the anticorrosive to cover can be increased compared with the past. For this reason, it is suppressed that the electric wire 10 shakes around the part crimped | bonded by the covering crimping | compression-bonding part 25. FIG. Therefore, the anticorrosive agent is hardly cracked.

Moreover, when the edge part of the edge part of the protrusion 29 or the bottom part 251 faces inside, it can suppress that the protrusion 29 or edge part opposes the force added from the outside of an anticorrosive. For this reason, when force is applied to the anticorrosion part 30, it can suppress that force concentrates on the protrusion 29 or an edge part, and a crack arises in an anticorrosive.

In the present embodiment, the lower mold group 60 is fixed at a fixed position with respect to the base 42 and the upper mold group 80 is moved downward. However, this is not necessary, and both of them move. Even if it exists, the structure by which the upper mold | type group 80 is fixed and the lower mold | type group 60 raises may be sufficient. In short, it is sufficient if they are relatively close to each other.

However, as in this embodiment, the lower mold group 60 is fixed at a fixed position with respect to the base 42, and the upper mold group 80 is moved downward to reduce the movable parts and the drive mechanism section. Therefore, the configuration can be simplified. Further, since the lower mold group 60 is fixed, the crimp terminal 20 and the electric wire 10 can be stably supported, and stable crimping can be performed.

<5. Modification>
In the above embodiment, the process of crimping the insulation coating 13 of the electric wire 10 by the coated crimping part 25 and the process of processing the bottom part 251 of the coated crimping part 25 into an inclined structure are performed simultaneously. Not limited. For example, after the crimping process between the crimp terminal 20 and the electric wire 10 is performed and the crimp terminal 20 is connected to the electric wire 10, the process of processing the bottom 251 of the crimp terminal 20 inward may be performed.

Moreover, in the said embodiment, the part of the crimp terminal 20 connected to the bottom part 251 of the covering crimp part 25 and the crimp terminal chain 200 a are connected, and the part between the crimp terminal chain 200 a and the crimp terminal 20 is connected. However, the present invention is not limited to such a form. The part of the crimp terminal connected to the bottom of the connection part and the chain band for the crimp terminal may be connected, and the part between the chain band for the crimp terminal and the crimp terminal may be cut off.

FIG. 7 shows a side view showing an end portion of the base side of the terminal-attached electric wire 5a in such a case. In this case, no protrusion is formed on the bottom portion 251 of the covering crimping portion 25, but the outward edge portion 29a constituting the end of the bottom portion 251 of the covering crimping portion 25 may damage surrounding members. For this reason, the process which inclines the bottom part 251 of the coating | coated crimping | compression-bonding part 25 containing the said outward edge part 29a or the outward edge part 29a inward is given. In FIG. 7, the entire bottom portion 251 is processed inward, and the bottom portion 251 corresponds to the inward portion. The terminal-attached electric wire 5a can obtain the same effect as the above embodiment.

The elevating drive mechanism 49 may include two drive units that individually elevate and lower the first upper mold 84 and the second upper mold 90.

Claims

A wire having a core wire extending from an end portion of the insulation coating; a crimp terminal having a core wire crimp portion for crimping the core wire; and a coating crimp portion for crimping the insulation coating;
An electric wire with a terminal, wherein a bottom portion of the covering crimp portion includes an inward portion formed inward toward an outer peripheral surface of the insulating coating at an outer end portion in an extending direction of the electric wire.
It is an electric wire with a terminal according to claim 1,
The electric wire with a terminal, wherein the inward portion bites into the outer peripheral surface of the insulating coating.
It is an electric wire with a terminal according to claim 1 or 2,
The inward portion is a terminal-attached electric wire having a structure in which the entire bottom portion of the covering crimp portion is inclined inward toward the outer peripheral surface of the insulating coating.
It is an electric wire with a terminal according to any one of claims 1 to 3,
The core wire and the crimp terminal are dissimilar metals,
An electric wire with a terminal, further comprising an anticorrosion part formed by covering the at least the coated crimped part and the insulating coating adjacent to the coated crimped part.
An electric wire having a core wire and an insulation coating that covers the core wire is a method for producing a terminal-attached electric wire connected to a crimp terminal having a core wire crimp portion that crimps the core wire and a coated crimp portion that crimps the insulation coating. There,
(A) peeling off the insulating coating at the end of the electric wire to expose the core wire to the outside;
(B) a step of arranging the electric wire on the crimp terminal such that the core wire is positioned on the core crimp portion and the insulating coating is positioned on the coated crimp portion;
(C) a step of crimping the core wire crimping portion and the covering crimping portion to the electric wire;
(D) a step of processing at least an outer end portion in the extending direction of the electric wire out of the bottom portion of the covering crimp portion inward toward the outer peripheral surface of the insulating coating;
The manufacturing method of the electric wire with a terminal provided with.
It is a manufacturing method of the electric wire with a terminal according to claim 5,
The manufacturing method of the electric wire with a terminal by which the said process (c) and the said process (d) are implemented simultaneously.
A terminal crimping apparatus for connecting an electric wire having a core wire and an insulation coating covering the core wire to a crimp terminal having a core wire crimping portion for crimping the core wire and a coating crimping portion for crimping the insulation coating,
A first base part on which the core wire crimping part can be placed;
A first pressing part disposed above the first base part and capable of pressing the core crimping part downward;
The covering crimping portion can be placed, and the portion of the mounting surface of the covering crimping portion that is in contact with at least the outer end portion in the extending direction of the electric wire among the bottom of the covering crimping portion is inclined upward. A second base,
A second pressing part disposed above the second base part and capable of pressing the second crimping piece downward;
A drive mechanism that relatively moves the first pressing portion and the first base portion relatively apart from each other, and relatively moves the second pressing portion and the second base portion relatively apart from each other;
A terminal crimping apparatus comprising:
The terminal crimping device according to claim 7,
The terminal crimping device, wherein the mounting surface of the second base part is inclined with the end part on the first base part side downward.