JP2017126520A - Wire with terminal and method of manufacturing wire with terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology capable of suppressing deterioration in conductivity when a plurality of wires are connected to each other.SOLUTION: There is provided a wire 10 with a terminal in which each of a plurality of wires 12 including core wires 14 and coating 18 covering the core wires 14 is connected to one terminal 20. The terminal 20 is crimped to the plurality of wires 12. The terminal 20 and the core wires 14 of the plurality of wires 12 are welded and the core wires 14 of the plurality of wires 12 are welded to each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a terminal-attached electric wire.

  When connecting a plurality of electric wires, an oxide film formed on the conductor may deteriorate conductivity. For example, Patent Document 1 discloses a technique for suppressing the influence of the oxide film.

  In patent document 1, it is supposed that the influence of an oxide film is suppressed by destroying an oxide film by strongly pressing one joint terminal (so-called strong pressure bonding) in a state where the ends of a plurality of electric wires are gathered.

JP2015-103501A

  However, with strong pressure bonding alone, the effect of the oxide film may still remain depending on the type of electric wire and the shape of the terminal.

  Then, an object of this invention is to provide the technique which can suppress the deterioration of electroconductivity at the time of connecting a some electric wire.

  In order to solve the above-described problem, the electric wire with terminal according to the first aspect is an electric wire with terminal in which a plurality of electric wires each including a core wire and a coating covering the core wire are connected to one terminal, The terminals and the core wires of the plurality of electric wires are welded to each other, and the core wires of the plurality of electric wires are welded to each other.

  The electric wire with a terminal which concerns on a 2nd aspect is an electric wire with a terminal which concerns on a 1st aspect, Comprising: The said terminal is formed in the rectangular tube shape.

  The electric wire with terminal according to the third aspect is the electric wire with terminal according to the first or second aspect, wherein the terminal is formed in an open barrel type, and both end edges in the circumferential direction of the terminal are located outside. It is pressure-bonded to such a shape.

  The electric wire with a terminal concerning the 4th mode is an electric wire with a terminal concerning the 3rd mode, and the above-mentioned terminal is crimped to the shape where one side supports the other in the direction of crimping among the above-mentioned both ends.

  The electric wire with a terminal according to the fifth aspect is an electric wire with a terminal according to any one of the first to fourth aspects, wherein a welded portion between the terminal and the core wire and a welded portion between the core wires are super The ultrasonic joining part formed by sonic welding is comprised.

  A terminal-attached electric wire according to a sixth aspect is a terminal-attached electric wire according to any one of the first to fifth aspects, wherein the plurality of electric wires are different from the first electric wire having a different hardness of the core wire. 2 electric wires.

  The manufacturing method of the electric wire with a terminal which concerns on a 7th aspect is a manufacturing method of the electric wire with a terminal by which the some electric wire was connected to one terminal, (a) The process of crimping | bonding the said terminal to the said some electric wire, (B) welding the terminals and the plurality of electric wires and welding the plurality of electric wires together.

  The manufacturing method of the electric wire with a terminal which concerns on an 8th aspect is a manufacturing method of the electric wire with a terminal which concerns on a 7th aspect, Comprising: In the said process (a), the said terminal is crimped | bonded so that an external shape may become square shape. Then, in the step (b), ultrasonic welding is performed on the terminal whose outer shape is a square shape.

  The manufacturing method of the electric wire with a terminal which concerns on a 9th aspect is a manufacturing method of the electric wire with a terminal which concerns on the 7th or 8th aspect, Comprising: In the said process (a), the said terminal formed in the open barrel type | mold is used. The terminal is crimped so that both end edges in the circumferential direction are located outside.

  The manufacturing method of the electric wire with a terminal which concerns on a 10th aspect is a manufacturing method of the electric wire with a terminal which concerns on a 9th aspect, Comprising: In the said process (a), one is the other in the crimping | compression-bonding direction among the said both-ends edge parts. The terminal is crimped in a supporting posture.

  According to the first to sixth aspects, it is possible to break the oxide film formed on the electric wire during crimping and during welding. Thereby, since the influence of an oxide film can be suppressed, the deterioration of the electroconductivity at the time of connecting a some electric wire can be suppressed.

  In particular, according to the second aspect, the terminal is formed in a rectangular tube shape. During welding, welding may be performed while pressurizing the object to be welded. At this time, if the terminal is formed in a rectangular tube shape, the terminal can be pressed on a plane perpendicular to the pressurizing direction, so that vibration is easily transmitted to the terminal and the core wire. Thereby, the deterioration of electroconductivity can be suppressed by welding in the state in which the oxide film was destroyed in each welding part.

  In particular, according to the third aspect, since the terminal is formed in an open barrel shape, even when the electric wire includes a plurality of strands, the strands are scattered or bent when the wires are arranged in the terminals. Can be suppressed. In addition, since both end edges in the circumferential direction of the terminal are crimped in such a way that they are exposed to the outside, even when an open barrel type terminal is strongly crimped, both end edges of the terminal are less likely to bite into the conductor. Can be prevented from being damaged. Thereby, deterioration of conductivity can be suppressed.

  In particular, according to the fourth aspect, even when an open barrel type terminal is strongly pressure-bonded, both end edges of the terminal are less likely to bite into the conductor, and the conductor can be prevented from being damaged. Thereby, deterioration of conductivity can be suppressed.

  In particular, according to the 5th aspect, the welding part of a terminal and a core wire and the welding part of core wires can be formed easily.

  In particular, according to the sixth aspect, each of the plurality of electric wires includes a first electric wire and a second electric wire having different core wire hardnesses. In this case, depending on the arrangement state of the core wires, it is difficult for force to be transmitted evenly at the time of crimping. Even in such a case, the deterioration of conductivity can be suppressed by performing welding together with the pressure bonding.

  According to the seventh to tenth aspects, the oxide film can be destroyed at the time of pressure bonding and welding. Thereby, since the influence of an oxide film can be suppressed, the deterioration of the electroconductivity at the time of connecting a some electric wire can be suppressed.

  In particular, according to the eighth aspect, since ultrasonic welding is performed on a terminal whose outer shape is a square shape, the terminal can be pressed in a plane perpendicular to the direction of pressurization during welding. It becomes easy to be transmitted to. Thereby, the deterioration of electroconductivity can be suppressed by welding in the state in which the oxide film was destroyed in each welding part.

  In particular, according to the ninth aspect, since the terminal is formed in an open barrel type, even when the electric wire is composed of a plurality of strands, the strands are scattered or bent when the wires are arranged in the terminals. Can be suppressed. In addition, since both end edges in the circumferential direction of the terminal are crimped in such a way that they are exposed to the outside, even when an open barrel type terminal is strongly crimped, both end edges of the terminal are less likely to bite into the conductor. Can be prevented from being damaged. Thereby, deterioration of conductivity can be suppressed.

  In particular, according to the tenth aspect, even when an open barrel type terminal is strongly pressure-bonded, both edge portions of the terminal are less likely to bite into the conductor, and damage to the conductor can be suppressed. Thereby, deterioration of conductivity can be suppressed.

It is a schematic plan view which shows the electric wire with a terminal which concerns on 1st Embodiment. It is a schematic sectional drawing which shows the electric wire with a terminal which concerns on 1st Embodiment. It is explanatory drawing which shows a mode that the electric wire with a terminal which concerns on 1st Embodiment is manufactured. It is explanatory drawing which shows a mode that the electric wire with a terminal which concerns on 1st Embodiment is manufactured. It is a schematic sectional drawing which shows the electric wire with a terminal which concerns on 2nd Embodiment. It is explanatory drawing which shows a mode that the electric wire with a terminal which concerns on 2nd Embodiment is manufactured. It is a schematic sectional drawing which shows the electric wire with a terminal which concerns on 3rd Embodiment. It is explanatory drawing which shows a mode that the electric wire with a terminal which concerns on 3rd Embodiment is manufactured. It is explanatory drawing which shows a mode that the electric wire with a terminal which concerns on 3rd Embodiment is manufactured.

{First embodiment}
Hereinafter, the electric wire with a terminal concerning a 1st embodiment is explained. FIG. 1 is a schematic plan view showing a terminal-attached electric wire 10 according to the first embodiment. FIG. 2 is a schematic sectional view showing the terminal-attached electric wire 10 according to the first embodiment.

  The terminal-attached electric wire 10 is formed by connecting a plurality of electric wires 12 to one terminal 20. Here, the electric wire 12 is connected to the terminal 20 using both crimping and welding.

  The electric wire 12 includes a core wire 14 and a coating 18 formed around the core wire 14 and covering the core wire 14. The core wire 14 is formed in a linear shape from a conductive material such as copper, a copper alloy, aluminum, or an aluminum alloy. Here, the core wire 14 is configured to have a plurality of strands 16 twisted together. But the core wire 14 may be comprised with the single wire. The covering 18 is formed by extruding an insulating resin material around the core wire 14 by an extrusion device or the like. A core wire 14 is exposed at the distal end portion of the electric wire 12, and an exposed core wire portion 15 having a predetermined length is formed.

  Here, the some electric wire 12 contains the 1st electric wire 12a from which the hardness of the core wire 14 differs, and the 2nd electric wire 12b. Here, the core wire 14a of the first electric wire 12a is formed using copper or a copper alloy as a material, and the core wire 14b of the second electric wire 12b is described using aluminum or an aluminum alloy as a material. . That is, here, a copper wire 12a is used as the first wire 12a, and an aluminum wire 12b is used as the second wire 12b. In this case, the core wire 14a of the first electric wire 12a is harder than the core wire 14b of the second electric wire 12b. Here, a description will be given assuming that one copper wire 12 a and one aluminum wire 12 b are connected to one terminal 20. However, it is also conceivable that at least one of the copper wire 12a and the aluminum wire 12b is included.

  Here, the copper wire 12a and the aluminum wire 12b are spliced. At this time, aluminum has a higher electrical resistivity than copper. For this reason, in order to make the electric resistance of the aluminum electric wire 12b and the electric resistance of the copper electric wire 12a the same, the cross-sectional area of the core wire 14b of the aluminum electric wire 12b is set larger than the cross-sectional area of the core wire 14a of the copper electric wire 12a.

  The terminal 20 is crimped to the plurality of electric wires 12. The terminal 20 is a member formed by, for example, pressing a plate material formed of copper or a copper alloy. Tin plating or the like may be applied to the surface of the terminal 20. Here, an open barrel type terminal 20 is used as the terminal 20.

  The terminal 20 includes a core wire crimping portion 22. The core wire crimping portion 22 is formed in a so-called open barrel shape that is opened before crimping. The terminal 20 is crimped in a rectangular tube shape. Specifically, the core wire crimping portion 22 before crimping has a configuration in which a pair of crimping pieces 26 and 27 are extended and formed on both sides of the bottom portion 24. Accordingly, the tip edge portions 26 a and 27 a of the pair of crimping pieces 26 and 27 form the circumferential edge portion of the terminal 20. The bottom 24 is formed in a planar shape. One crimping piece 26 is formed to have a larger protruding dimension than the other crimping piece 27. In a state where the exposed core portion 15 is disposed on the bottom portion 24, the crimping pieces 26 and 27 are caulked to the exposed core portion 15. Here, the tip edge portion 26 a of one crimping piece 26 is crimped so as to be in contact with the tip edge portion 27 a of the other crimping piece 27. Therefore, the pair of crimping pieces 26, 27 are crimped in such a shape that the front end edges 26a, 27a (both end edges in the circumferential direction of the terminal 20) are located outside. Thereby, it is suppressed that the front-end | tip edge parts 26a and 27a of the crimping | compression-bonding pieces 26 and 27 bite into the core wire 14, and it is suppressed that a strand breaks.

  The terminal 20 is crimped to a shape in which the tip edge portion 26a of one crimping piece 26 is supported by the tip edge portion 27a of the other crimping piece 27 in the crimping direction. Here, the crimping direction is a moving direction of the upper mold 52 in the terminal crimping device 50 described later, and here is a direction orthogonal to the bottom portion 24. Thereby, it is suppressed that the front-end edge parts 26a and 27a of the crimping pieces 26 and 27 bite into the core wire 14. FIG.

  An oxide film may be formed on the surface of the core wire 14 before connection to the terminal 20. When the oxide film is interposed in the connection portion, the conductivity may be lowered. For this reason, in order to ensure the stable electroconductivity in the electric wire 10 with a terminal, it is preferable to destroy the said oxide film at the time of the connection with the terminal 20. FIG. At this time, since aluminum has a large chemical affinity, the oxide film formed on the surface of the core wire 14b of the aluminum electric wire 12b tends to be strong. Therefore, in order to break the oxide film (particularly, the aluminum oxide film) only by crimping, it is desirable that a certain level of force is applied to each strand 16b of the aluminum electric wire 12b.

  However, due to the difference in hardness and cross-sectional area between the copper wire 12a and the aluminum wire 12b as described above, depending on the arrangement of the core wire 14 (element wire 16) when the terminal 20 is crimped, the crimping is performed by the same crimping method. Even if it does, there exists a possibility that dispersion | variation may become large in the force applied to each strand 16b of the aluminum electric wire 12b. In this case, a certain force or more is not applied to the strand 16b of the aluminum electric wire 12b, and the oxide film of the strand 16b may not be completely destroyed. Such a terminal-attached electric wire 10 that cannot completely destroy the oxide film may not have sufficient conductivity.

  Thus, when a terminal and a core wire are connected only by pressure bonding, there is a possibility that quality varies greatly from product to product and a part of the product becomes defective. In order to avoid such a situation, here, the terminal-attached electric wire 10 is welded after the terminal 20 is crimped. Here, the terminal 20 and the core wires 14 of the plurality of electric wires 12 are welded. Moreover, the core wires 14 of the plurality of electric wires 12 are welded together. More specifically, the core wires 14a are welded, the core wires 14b are welded, and the core wire 14a and the core wire 14b are welded. Here, the welded portion between the terminal 20 and the core wire 14 and the welded portion between the core wires 14 constitute an ultrasonic joint 30 formed by ultrasonic welding. That is, here, ultrasonic welding is performed so that the inside of the terminal 20 is integrated to form the ultrasonic bonding portion 30. The ultrasonic welding will be described in detail by the following manufacturing method. But as a welding method, it is not restricted to ultrasonic welding, Other welding methods, such as resistance welding, may be employ | adopted.

<Manufacturing method>
The manufacturing method of the electric wire 10 with a terminal which concerns on 1st Embodiment is demonstrated referring FIG.3 and FIG.4. FIG.3 and FIG.4 is explanatory drawing which shows a mode that the electric wire 10 with a terminal which concerns on 1st Embodiment is manufactured.

  First, as shown in FIG. 3, the core wire 14 is disposed inside the terminal 20 formed in an open barrel type through the opening. Under the present circumstances, although the arrangement | sequence of the strand 16 is supposed to be put together for every electric wire 12, this is not essential. You may mix so that each strand 16 of the two electric wires 12 may be scattered.

  When the core wire 14 is disposed in the terminal 20, the terminal 20 is crimped to the plurality of electric wires 12. The terminal 20 is crimped by, for example, a terminal crimping apparatus 50 that includes an upper mold 52 (also referred to as a crimper) and a lower mold 54 (also referred to as an anvil) that are disposed so as to be capable of approaching and separating. As described above, the moving direction of the upper mold 52 may be referred to as a crimping direction. At this time, the opposing surfaces 53 and 55 of the upper mold 52 and the lower mold 54 are formed in a concave shape here. Further, the bottom surfaces 53a and 55a of the surfaces 53 and 55 are formed in a planar shape. Thereby, the terminal 20 is crimped | bonded so that it may be pinched | interposed between the bottom surfaces 53a and 55a, and the external shape becomes a square shape. A portion of the surface 53 of the upper mold 52 positioned above the crimping piece 26 having a large protruding dimension is formed in a curved surface, and is a guide surface 53b that can guide the crimping piece 26 toward the bottom surface 53a. Can be considered.

  More specifically, the upper mold 52 is moved toward the lower mold 54 in a state where the terminals 20 and the electric wires 12 are placed on the bottom surface 55 a of the surface 55 of the lower mold 54. Then, the tip of the crimping piece 26 having a large projecting dimension gradually approaches the tip of the other crimping piece 27 by the surface 53 of the upper mold 52 and comes into contact with it. In this state, the upper die 52 is further brought closer to the lower die 54 and the terminal 20 is compressed, whereby the terminal 20 is crimped to the plurality of electric wires 12. At this time, both end edges 26a and 27a in the circumferential direction of the terminal 20 are located outside. In particular, here, one end 26a of both end edges 26a, 27a is supported by the other end 27a in the crimping direction. Thereby, it is suppressed that the both-ends edge part of the circumferential direction of the terminal 20 bites into the electric wire 12. FIG.

  Note that the corners of the four corners of the terminal 20 may be slightly rounded. In particular, it is conceivable that the corner of the terminal 20 that contacts the guide surface 53b of the upper mold 52 is slightly rounded according to the shape of the guide surface 53b.

  If the crimping | compression-bonding of the terminal 20 is completed, it will move to a welding process. Here, in the workpiece W in which the terminals 20 are crimped to the plurality of electric wires 12, the core wires 14 of the plurality of electric wires 12 are welded together, and the terminals 20 and the core wires 14 of the plurality of electric wires 12 are welded. Here, as shown in FIG. 4, ultrasonic welding is performed on the terminal 20 whose outer shape is a square shape using an ultrasonic welding device 60.

  Here, the ultrasonic welding apparatus 60 will be described. The ultrasonic welding apparatus 60 includes a sonotrode 62, an anvil plate 64, a gliding jaw 66, and an anvil 68.

  The sonotrode 62 is formed so that the workpiece W can be placed thereon, and imparts vibration caused by the ultrasonic waves to the workpiece W placed thereon. In the sonotrode 62, the placement surface 62a on which the workpiece W is placed is formed in a flat shape. The sonotrode 62 vibrates in a direction parallel to the placement surface 62a.

  The anvil plate 64 is disposed on the side of the sonotrode 62 and presses one side surface of the workpiece W. Of the anvil plate 64, a pressing surface 64a facing the workpiece W is formed in a planar shape orthogonal to the placement surface 62a.

  The gliding jaw 66 is disposed above the sonotrode 62. The gliding jaw 66 is disposed on the opposite side of the anvil plate 64 and presses the other side surface of the workpiece W placed on the placement surface 62a. The pressing surface 66a facing the workpiece W of the gliding jaw 66 is formed in a planar shape orthogonal to the placement surface 62a. That is, the pressing surface 64a of the anvil plate 64 and the pressing surface 66a of the gliding jaw 66 are both formed in a planar shape that is orthogonal to the mounting surface 62a and parallel to each other.

  The anvil 68 is disposed above the sonotrode 62 and the anvil plate 64. The pressing surface 68a of the anvil 68 that faces the mounting surface 62a of the sonotrode 62 is formed in a flat shape parallel to the mounting surface 62a.

  Next, a welding method using the ultrasonic welding apparatus 60 will be described.

  First, the workpiece W in which the terminals 20 are crimped to the plurality of electric wires 12 is placed on the placement surface 62 a of the sonotrode 62.

  When the workpiece W is placed on the placement surface 62 a, the both sides of the workpiece W are sandwiched between the gliding jaw 66 and the anvil plate 64. Thus, by sandwiching both side surfaces of the workpiece W by the gliding jaw 66 and the anvil plate 64, the movement of the workpiece W in the horizontal direction is restricted. The both sides of the workpiece W may be clamped while being pressed by the gliding jaw 66 and the anvil plate 64.

  When both side surfaces of the workpiece W are clamped by the gliding jaw 66 and the anvil plate 64, the upper and lower surfaces of the workpiece W are clamped while being pressed by the sonotrode 62 and the anvil 68.

  Note that the amount of pressure applied to the workpiece W is appropriately set depending on the size, material, and target welding degree of the workpiece W for ultrasonic welding. At this time, in the crimping process, the terminal 20 may be strongly crimped in the pressurizing process before welding in the ultrasonic welding process while the terminal 20 is crimped weakly.

  When the pressurization to the workpiece W is completed, finally, an ultrasonic welding process is performed in which ultrasonic vibration is applied to the workpiece W for welding. That is, the sonotrode 62 is ultrasonically vibrated while pressurizing the workpiece W with each member of the ultrasonic welding apparatus 60. Thereby, the workpiece | work W can be welded. More specifically, the terminal 20 and the core wire 14 can be welded and the core wires 14 can be welded together. At this time, since the terminal 20 is formed in a square shape, the terminal 20 can be pressed on a plane perpendicular to the pressing direction. Thereby, the vibration is easily transmitted to the terminal 20 and the core wire 14. By completing the welding of the workpiece W, the terminal-attached electric wire 10 is completed.

  According to the terminal-attached electric wire 10 and the manufacturing method thereof, the oxide film formed on the core wire 14 of the electric wire 12 can be destroyed during crimping and welding, respectively. Thereby, since the influence of an oxide film can be suppressed, the deterioration of the electroconductivity at the time of connecting the some electric wires 12 can be suppressed.

  Further, during welding, welding may be performed while pressurizing the object to be welded. At this time, if the terminal 20 is formed in a rectangular tube shape, the terminal 20 can be pressed in a plane perpendicular to the pressurizing direction, so that vibration is easily transmitted to the terminal 20 and the core wire 14. Thereby, the deterioration of electroconductivity can be suppressed by welding in the state in which the oxide film was destroyed in each welding part.

  Since the terminal 20 is formed in an open barrel shape, even when the electric wire 12 includes a plurality of strands 16, the strand 16 may be broken or bent when the electric wires 12 are disposed in the terminal 20. Can be suppressed. Further, since both end edges 26a and 27a in the circumferential direction of the terminal 20 are crimped to the outside, even when the open barrel type terminal 20 is strongly crimped, both end edges 26a, It becomes difficult for 27a to bite into a conductor, and it can suppress that a conductor is damaged. Thereby, deterioration of conductivity can be suppressed. In particular, since one end edge portion 27a in the circumferential direction of the terminal 20 supports the other end edge portion 26a in the crimping direction, even when the open barrel type terminal 20 is strongly crimped, both end edge portions 26a of the terminal 20, It becomes difficult for 27a to bite into a conductor, and it can suppress that a conductor is damaged. Thereby, deterioration of conductivity can be suppressed.

  Moreover, since ultrasonic welding is employed, a welded portion between the terminal 20 and the core wire 14 and a welded portion between the core wires 14 can be easily formed.

  Each of the plurality of electric wires 12 includes a first electric wire 12a and a second electric wire 12b whose core wires 14 have different hardnesses. In this case, depending on the arrangement state of the core wires 14, the force is not easily transmitted evenly during the crimping, so that the oxide film may not be completely destroyed by the crimping alone. Even in such a case, the deterioration of conductivity can be suppressed by performing welding together with the pressure bonding.

{Second Embodiment}
Next, the electric wire with a terminal concerning a 2nd embodiment is explained. FIG. 5 is a schematic cross-sectional view showing a terminal-attached electric wire 110 according to the second embodiment. FIG. 6 is an explanatory view showing a state of manufacturing the terminal-attached electric wire 110 according to the second embodiment. In the description of the present embodiment, the same components as those described above are denoted by the same reference numerals, and the description thereof is omitted.

  In the electric wire with terminal 110 according to the second embodiment, the shape of the terminal 120 is different from the shape of the terminal 20 according to the first embodiment.

  Here, the terminal 120 is formed such that the pair of crimping pieces 126 and 127 have the same projecting dimensions, and the circumferential edge portions 126a and 126b are crimped so as to contact each other at the intermediate portion in the width direction of the terminal 120. Yes. As shown in FIG. 6, the terminal 120 is formed in a shape in which a pair of crimping pieces 126 and 127 are both opened outward as shown in FIG. 6. The pair of crimping pieces 126 and 127 are crimped in such a shape that the leading edge portions 126a and 127a abut against each other while the leading edge portions 126a and 127a are closed.

  Even when the terminal-equipped electric wire 110 is manufactured by adopting such a terminal 120, the first embodiment of the effect other than the effect of the one end edge portion in the circumferential direction of the terminal supporting the other end edge portion in the crimping direction. The effect similar to the electric wire 10 with a terminal which concerns on a form, and its manufacturing method can be acquired.

{Third embodiment}
Next, the electric wire with a terminal concerning a 3rd embodiment is explained. FIG. 7 is a schematic cross-sectional view showing a terminal-attached electric wire 210 according to the third embodiment. FIG.8 and FIG.9 is explanatory drawing which shows a mode that the electric wire 210 with a terminal which concerns on 3rd Embodiment is manufactured. In the description of the present embodiment, the same components as those described above are denoted by the same reference numerals, and the description thereof is omitted.

  In the electric wire with terminal 210 according to the third embodiment, the shape of the terminal 220 is different from the shape of the terminal 20 according to the first embodiment.

  Here, the bottom 224 is formed in a V shape. Further, the pair of crimping pieces 226 and 227 are formed so as to have the same projecting dimensions, and are crimped so that the circumferential end edges 226a and 227a are gradually bent in such a manner that they are located inside the terminal 220. . As shown in FIG. 7, the terminal 220 is formed in a shape in which a pair of crimping pieces 226 and 227 are both opened outward as shown in FIG. 7. And a pair of crimping | compression-bonding pieces 226 and 227 are crimped | bonded so that the front-end | tip edge part 226a, 227a may enter the inside of the terminal 220, adjoining.

  Even when the terminal-equipped electric wire 210 is manufactured using such a terminal 220, the terminal is formed in a square tube shape, and the one end edge in the circumferential direction of the terminal is crimped to the other end edge. About effects other than the effect by supporting to a direction, the effect similar to the electric wire 10 with a terminal which concerns on 1st Embodiment, and its manufacturing method can be acquired.

{Modifications}
In each embodiment, although the electric wire 12 was demonstrated as what contains the 1st electric wire 12a and the 2nd electric wire 12b from which the hardness of the core wire 14 differs, this is not essential. There may be one type of core wire which comprises an electric wire with a terminal, and three or more types may be sufficient as it. For example, only a plurality of aluminum wires may be crimped to one terminal.

  Moreover, in the said electric wire 10 with a terminal, although the part to which the terminal 20 is connected was demonstrated as what was a spliced part, this is not essential. For example, the part to which the terminal is connected in the electric wire with terminal may be one in which a plurality of electric wires are crimped to one terminal including the mating connection part. In this case, as the shape of the mating connection portion, for example, a shape in which a hole for inserting a bolt is formed in a plate-like portion extending from the bottom portion of the core wire crimping portion can be considered. Such a terminal is used as a ground terminal, for example. Further, it is conceivable that the terminal includes a coated crimping portion in addition to the core wire crimping portion. The cover crimping part is formed on one side of the core crimping part (if the mating connection part is provided, the side opposite to the mating connection part), and a pair of crimping pieces are extended on both sides of the bottom It is conceivable that the configuration is made. And a pair of crimping | compression-bonding pieces is crimped to a coating | cover in the state which has arrange | positioned the edge part of a coating | cover on the bottom part.

  In addition, each structure demonstrated by said each embodiment and each modification can be suitably combined unless it mutually contradicts.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Electric wire with a terminal 12 Electric wire 14 Core wire 15 Exposed core wire part 16 Elementary wire 18 Coating | coated 20 Terminal 22 Core wire crimping part 24 Bottom part 26 Crimp piece 30 Ultrasonic joining part 50 Terminal crimping apparatus 60 Ultrasonic welding apparatus

Claims (10)

A plurality of electric wires each including a core wire and a coating covering the core wire are connected to one terminal,
The terminal is crimped to a plurality of the electric wires,
An electric wire with a terminal, wherein the terminal and the core wires of the plurality of electric wires are welded, and the core wires of the plurality of electric wires are welded to each other. It is an electric wire with a terminal according to claim 1,
The said terminal is an electric wire with a terminal formed in the shape of a square tube. It is an electric wire with a terminal according to claim 1 or claim 2,
The electric wire with a terminal, wherein the terminal is formed in an open barrel shape, and is crimped in such a shape that both end edges in the circumferential direction of the terminal are located outside. It is an electric wire with a terminal according to claim 3,
The said terminal is an electric wire with a terminal currently crimped | bonded by the shape which one side supports the other in the crimping | compression-bonding direction among the said both ends edge part. It is an electric wire with a terminal given in any 1 paragraph of Claims 1-4,
The welded portion of the terminal and the core wire and the welded portion of the core wires are terminal-attached electric wires that constitute an ultrasonic joint formed by ultrasonic welding. It is an electric wire with a terminal given in any 1 paragraph of Claims 1-5,
The plurality of electric wires are a terminal-attached electric wire including a first electric wire and a second electric wire having different hardnesses of the core wire. A method of manufacturing a terminal-attached electric wire in which a plurality of electric wires are connected to one terminal,
(A) a step of crimping the terminals to the plurality of electric wires;
(B) welding the plurality of electric wires while welding the terminal and the plurality of electric wires;
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 7,
In the step (a), the terminal is crimped so that the outer shape is a square shape,
In the step (b), a method for manufacturing a terminal-attached electric wire, wherein ultrasonic welding is performed on the terminal whose outer shape is a square shape. It is a manufacturing method of the electric wire with a terminal according to claim 7 or claim 8,
In the step (a), the terminal formed in an open barrel shape is crimped so that both end edges in the circumferential direction of the terminal are located outside. It is a manufacturing method of the electric wire with a terminal according to claim 9,
In the step (a), a method of manufacturing a terminal-attached electric wire, wherein the terminal is crimped in a posture in which one of the end edges supports the other in the crimping direction.

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