JP2017098110A - Terminal-equipped wire and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent sticking of jig and conductor without lowering welding energy.SOLUTION: A terminal-equipped wire has a terminal connected by ultrasonic welding to a conductor constituting an electric wire. The terminal includes: a connecting portion to be connected to a member to be connected; a plate-like conductor connecting portion formed on a base end side of the connecting portion and connected to the conductor; and a pair of plate-shaped portions arranged separately on the side of the conductor connecting portion and connected to the conductor.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric wire with a terminal to which a terminal is connected and a method for manufacturing the electric wire.

Conventionally, in a wire with a terminal in which a terminal is connected to a conductor of a wire, a connection method by ultrasonic welding is known as a connection method between the terminal and the wire (see, for example, Patent Document 1 below).
In the method of manufacturing an electric wire with a terminal disclosed in Patent Document 1, in the welding process by ultrasonic welding, for example, the terminal and the conductor of the electric wire are sandwiched between a set of jigs, and the variation of the conductor is suppressed. The terminal is connected to the electric wire by performing ultrasonic welding while pressing the conductor from the direction opposite to the wire.

JP 2013-4406 A

  However, in the manufacturing method of Patent Document 1 described above, for example, when a so-called thick electric wire having a large conductor cross-sectional area is ultrasonically welded, the welding energy increases, so that a set of restraining jigs stick to the conductor. is there. On the other hand, if the welding energy is reduced, welding becomes insufficient, and the quality of the electric wire with terminal is lowered.

  This invention is made | formed in view of the said situation, and it aims at providing the electric wire with a terminal which can prevent sticking with a jig | tool and a conductor, and its manufacturing method, without reducing welding energy.

  The electric wire with a terminal according to the present invention is an electric wire with a terminal formed by connecting a terminal to a conductor constituting the electric wire by ultrasonic welding, wherein the terminal is connected to a connected member; and the connecting portion And a pair of plate-like portions that are separately provided on the side of the conductor connection portion and connected to the conductor. It is characterized by that.

  According to the terminal-attached electric wire according to the present invention, the pair of plate-like portions arranged separately on the side of the conductor connection portion together with the flat-plate-like conductor connection portion of the terminal are respectively connected to the conductors of the electric wires. . For this reason, there is no sticking between the jig that holds the conductor connection part of the terminal from the side and the conductor, it is not necessary to reduce the welding energy during ultrasonic welding, and the deterioration of the quality of the electric wire with the terminal can be prevented. it can. In addition, as with conventional terminals having a plate-like portion integrated with the conductor connection portion, it is not necessary to perform punching or bending of the terminal for providing the plate-like portion. It is possible to provide a plate-like portion on the plate.

  In one Embodiment of this invention, the said plate-shaped part is arrange | positioned at the end surface side of the side of the said conductor connection part.

  In another embodiment of the present invention, the plate-like portion is disposed on a side edge portion of the conductor placement side plate surface on the side of the conductor connection portion.

  The method for manufacturing an electric wire with a terminal according to the present invention is a method for manufacturing an electric wire with a terminal in which the conductor of the electric wire is connected to a terminal connected to a conductor constituting the electric wire by ultrasonic welding, and an ultrasonic welding apparatus A step of placing the flat conductor connection portion of the terminal on the anvil provided to the terminal and disposing the terminal; and on the opposing surface side of the pair of jigs arranged opposite to the side of the conductor connection portion. A step of disposing a plate-shaped portion made of a plate-shaped member; a step of disposing a conductor of the electric wire on the conductor connecting portion placed on the anvil; and the pair of jigs from the side of the conductor connecting portion. A step of pressing with a tool, a step of inserting a horn of the ultrasonic welding apparatus between the pair of jigs from the direction facing the plate surface of the conductor connecting portion toward the conductor, and the conductor by the horn. While guiding toward the anvil, the guide Characterized by comprising the step of ultrasonic welding to the connecting portion and the plate portion.

  According to the method for manufacturing a terminal-attached electric wire according to the present invention, the conductor connection portion is separated from the conductor connection portion on the opposite surface side of the pair of jigs arranged opposite to the side of the conductor connection portion placed on the anvil. Placing each plate-like part, holding the conductor connection part with a pair of jigs from the side, and then ultrasonically welding the conductor to the conductor connection part and the plate-like part, the welding energy at the time of ultrasonic welding is reduced Adhering between the jig and the conductor can be prevented without lowering, and the quality of the electric wire with terminal can be prevented from being lowered.

  In one embodiment of the present invention, in the pressing step, a side end surface of the conductor connecting portion is pressed through the plate-like portion.

  In another embodiment of the present invention, in the pressing step, pressing is performed so that the plate-like portion is disposed on a side edge portion of the conductor placement side plate surface on the side of the conductor connection portion.

  In still another embodiment of the present invention, in the step of arranging the plate-like portion, the plate-like portion is fitted and arranged in the recesses respectively provided on the opposing surfaces of the pair of jigs.

  According to the present invention, sticking between a jig and a conductor can be prevented without reducing welding energy during ultrasonic welding.

It is explanatory drawing which shows the electric wire with a terminal which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the manufacturing process of the electric wire with a terminal. It is sectional drawing which shows the manufacturing process of the electric wire with a terminal. It is explanatory drawing which shows the electric wire with a terminal which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the manufacturing process of the electric wire with a terminal.

  Hereinafter, a terminal-attached electric wire and a method for manufacturing the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is an explanatory view showing a terminal-attached electric wire 1 according to a first embodiment of the present invention, FIG. 1 (a) shows a perspective view, and FIG. 1 (b) shows an A- in FIG. A sectional view taken along line A 'is shown. Moreover, FIG. 2 is a flowchart which shows the manufacturing process of the electric wire 1 with a terminal. Furthermore, FIG. 3 is sectional drawing which shows the manufacturing process of the electric wire 1 with a terminal.

  As shown in FIGS. 1A and 1B, the terminal-attached electric wire 1 according to the first embodiment includes a covered electric wire 10 and a core wire exposed portion 13 of the core wire 11 in a terminal portion on the distal end side of the covered electric wire 10. And a terminal 20 connected to the terminal. The covered electric wire 10 includes a core wire 11 formed by twisting together a plurality of elongated wires such as copper and aluminum, and a coating 12 made of an insulating resin that covers the periphery of the core wire 11 and insulates and protects the core wire 11 from the outside. ing.

  The coating 12 can be formed so as to cover the core wire 11 by, for example, a tube extrusion method. In the core wire exposed portion 13, the coating 12 is peeled (removed), and the core wire 11 is exposed in the core wire exposed portion 13. In addition, the core wire 11 of the covered electric wire 10 is not limited to what is comprised by a some strand.

  The terminal 20 is formed, for example, by punching a plate-shaped metal base material. Copper, aluminum, or the like can be used as the metal base material. The terminal 20 is provided with a piece-like connection portion 22 for fixing the terminal 20 in contact with a counterpart member to be connected such as a ground terminal. The terminal 20 includes a flat conductor connecting portion 21 formed on the proximal end side of the connecting portion 22 and connected to the core wire 11 in the core wire exposed portion 13 of the covered electric wire 10 by ultrasonic welding.

  The tip of the connection portion 22 of the terminal 20 is formed in a circular flat plate shape, for example. A circular screw insertion hole 22a through which a screw for conducting a conductive connection to a connected member (not shown) by screwing is formed at the center. The conductor connection portion 21 has a plate surface 21a that forms a plane extending in a direction along the axial direction of the core wire 11 capable of ultrasonic welding the core wire 11 in the core wire exposed portion 13 and in a direction intersecting with the axial direction.

  A plate-like portion 31 and a plate-like portion 32 are provided on the side of the side end face 23 and end face 24 of the conductor connecting portion 21. The plate-like portions 31 and 32 are arranged separately from the terminal 20 in a standing state and are connected to the core wire 11. Specifically, the pair of plate-like portions 31 and 32 are connected to the core wire 11 in the core wire exposed portion 13 by ultrasonic welding at the plate surface 31a and the plate surface 32a on the opposite direction side.

  The pair of plate portions 31 and 32 are sufficiently higher than the height on the plate surface 21a of the core wire 11 that is ultrasonically welded to the conductor connection portion 21 of the terminal 20 and deformed into a rounded rectangular cross section. It is formed to have a height in the standing direction. In the thus configured electric wire with terminal 1, the pair of plate-like portions 31 and 32 arranged separately together with the flat conductor connecting portion 21 of the terminal 20 are ultrasonically welded to the core wire 11 of the covered electric wire 10, respectively. Connected by.

  For this reason, the jig | tool (not shown) for pressing down the conductor connection part 21 of the terminal 20 from the side and the core wire 11 do not adhere at the time of ultrasonic welding. Thereby, it is not necessary to reduce the welding energy at the time of ultrasonic welding for sticking prevention, and it becomes possible to prevent quality degradation, such as a connection failure of the electric wire 1 with a terminal.

  Further, as compared with a terminal having a plate-like portion integrated with a conventional conductor connection portion, the terminal-attached electric wire 1 does not require punching or bending of the terminal 20 for providing the plate-like portions 31 and 32. it can. Thereby, since it is not necessary to punch out a terminal having an area including the plate-like portions 31 and 32 from the terminal base material, waste of the terminal base material can be reduced. Further, since the plate-like portions 31 and 32 are welded and fixed to the core wire 11 at the time of ultrasonic welding, the plate-like portions 31 and 32 can be easily provided without undergoing a bending process. Further, even when the terminal 20 is thick and difficult to bend, the plate-like portions 31 and 32 can be easily provided.

  Next, the manufacturing process of the terminal-attached electric wire 1 according to the first embodiment will be described. Here, according to the flowchart of FIG. 2, the manufacturing process will be described with reference to FIG. In the following description including FIG. 2 and FIG. 3, the same components as those in the first embodiment are denoted by the same reference numerals, and hence redundant description is omitted below.

  First, as shown to Fig.3 (a), while preparing the anvil 80 of an ultrasonic welding apparatus, the jig | tool 91 and the plate-shaped part 32 in which the recessed part 91a for fittingly arrange | positioning the plate-shaped part 31 was formed. A jig 92 having a recess 92a for fitting and arranging is prepared. The pair of jigs 91 and 92 are arranged on the anvil 80 so that the concave portions 91a and 92a are located on the opposing surface sides.

  Next, as illustrated in FIG. 3B, the conductor connection portion 21 is placed on the anvil 80 and the terminal 20 is disposed. Further, the plate-like portions 31 and 32 are fitted and arranged in the concave portions 91a and 92a on the opposite surface side of the jigs 91 and 92, respectively (step S100). And as shown in FIG.3 (c), the core wire 11 in the core wire exposure part 13 of the covered electric wire 10 is mounted on the board surface 21a of the conductor connection part 21 of the terminal 20 mounted on the anvil 80. Arrange (step S102).

  Thereafter, as shown in FIG. 3D, the conductor connecting portion 21 on the anvil 80 is pressed by the jigs 91 and 92 from the side (step S104). At this time, in the first embodiment, the side end surfaces 23 and 24 of the conductor connecting portion 21 are pressed by the jigs 91 and 92 via the plate-like portions 31 and 32, respectively. That is, the lower plate surfaces 31 a and 32 a of the plate-like portions 31 and 32 are pressed so as to contact the end surfaces 23 and 24 of the conductor connection portion 21, respectively.

  And as shown in FIG.3 (e), it is between each jig | tool 91,92 toward the core wire 11 of the core wire exposure part 13 from the direction facing the plate surface 21a of the conductor connection part 21 (and plate-shaped part 31, 32), a welding horn 81 is inserted. The welding horn 81 performs ultrasonic welding while pressing the core wire 11 of the core wire exposed portion 13 toward the anvil 80 (in the direction indicated by arrow A in the figure) (step S106). Thereby, the core wire 11 is ultrasonically welded to the conductor connecting portion 21 and the plate-like portions 31 and 32.

  Finally, although not shown, the welding horn 81 is separated from the ultrasonic welded core wire 11 and the jigs 91 and 92 are separated from each other, and the terminal 20 is taken out from the anvil 80 together with the covered electric wire 10 (step S108). ). Thereby, the electric wire 1 with a terminal which concerns on 1st Embodiment is manufactured. Thus, in the manufacturing process of the terminal-attached electric wire 1 according to the first embodiment, the end surfaces 23 and 24 side of the conductor connecting portion 21 placed on the anvil 80 in the ultrasonic welding process of Step S106 described above, Ultrasonic welding is performed after being pressed by the jigs 91 and 92 via the plate-like portions 31 and 32. Thereby, the core wire 11 in the core wire exposed portion 13 is connected not only to the conductor connection portion 21 but also to the plate-like portions 31 and 32.

  Accordingly, the conductor cross-sectional area of the core wire 11 welded to the conductor connection portion 21 and the total cross-sectional area of the core wire 11 in the covered electric wire 10 are increased like a so-called thick wire, and the welding energy required for ultrasonic welding is increased. Even when the ultrasonic welding between the core wire 11 and the conductor connection portion 21 is performed, the core wire 11 does not stick to the jigs 91 and 92.

  For this reason, it is not necessary to reduce welding energy in order to prevent the jigs 91 and 92 from sticking to each other, and poor connection between the core wire 11 and the conductor connecting portion 21 is prevented to prevent the quality of the terminal-attached electric wire 1 from being deteriorated. be able to. The plate-like portions 31 and 32 are preferably made of a metal plate-like member, but can be inserted between the core wire 11 and the jigs 91 and 92 ultrasonically welded on the conductor connection portion 21. If it is a thing, it will not be limited to this.

[Second Embodiment]
FIG. 4 is an explanatory view showing a terminal-attached electric wire 1A according to a second embodiment of the present invention, FIG. 4 (a) shows a perspective view, and FIG. 4 (b) shows a B- in FIG. B 'sectional view is shown. Moreover, FIG. 5 is sectional drawing which shows the manufacturing process of 1 A of electric wires with a terminal. In addition, since the flowchart of the manufacturing process of 1 A of electric wires with a terminal which concerns on 2nd Embodiment is the same as that of the 1st Embodiment, it abbreviate | omits.

  As shown in FIGS. 4A and 4B, the terminal-attached electric wire 1A according to the second embodiment is such that the plate-like portions 31 and 32 are the conductor placement side plates on the side of the conductor connecting portion 21 of the terminal 20. It arrange | positions in the standing state on the side edge parts 25 and 25 of the surface (namely, plate surface 21a). This is different from the first embodiment described above in which the plate-like portions 31 and 32 are arranged so as to contact the end surfaces 23 and 24 of the conductor connection portion 21. Other configurations related to the second embodiment are the same as those of the first embodiment.

  Even if comprised in this way, it is possible to show the effect similar to 1st Embodiment. Further, since the plate-like portions 31 and 32 are disposed on the side edge portions 25 and 25 of the plate surface 21a of the conductor connecting portion 21, the width of the conductor connecting portion 21 including the plate-like portions 31 and 32 is set to the conductor. The width of the connecting portion 21 itself can be set. As a result, the conductor connecting portion 21 including the plate-like portions 31 and 32 can be made compact.

  The terminal-attached electric wire 1A according to the second embodiment is manufactured, for example, as follows. First, as shown to Fig.5 (a), the jig | tool 91,92 in which the anvil 80 and recessed part 91a, 92a were formed is prepared. Next, as shown in FIG.5 (b), the conductor connection part 21 and the plate-shaped parts 31 and 32 are arrange | positioned on the anvil 80 and recessed part 91a, 92a, respectively.

  Then, as shown in FIG. 5C, the core wire 11 in the core wire exposed portion 13 is arranged on the plate surface of the conductor connecting portion 21. Further, as shown in FIG. 5 (d), jigs 91 and 92 are arranged so that the plate-like portions 31 and 32 are arranged on the side edge portions 25 and 25 of the plate surface 21a on the side of the conductor connecting portion 21, respectively. The conductor connection part 21 is pressed down with.

  Finally, as shown in FIG. 5 (e), the conductor connecting portion 21 and the plate-like portions 31 and 32 are pressed while pressing the core wire 11 toward the anvil 80 by the welding horn 81 inserted between the jigs 91 and 92. Weld ultrasonically. Then, the terminal 20 is taken out together with the covered electric wire 10, and the electric wire with terminal 1A according to the second embodiment is manufactured.

  Thus, in the manufacturing process of the terminal-attached electric wire 1A according to the second embodiment, the plate-like portions 31 and 32 are formed on the side edge portions 25 and 25 of the plate surface 21a of the conductor connection portion 21 in the ultrasonic welding step. Then, the end faces 23 and 24 of the conductor connecting portion 21 are pressed by jigs 91 and 92, and then ultrasonic welding is performed. Thereby, the core wire 11 in the core wire exposure part 13 is connected to the conductor connection part 21 and the plate-shaped parts 31 and 32 similarly to 1st Embodiment.

  In the above-described embodiment, the plate-like portions 31 and 32 are fitted and disposed in the recesses 91a and 92a of the jigs 91 and 92, but the present invention is not limited to this. For example, after the adhesive or adhesive is applied to the wall surfaces of the recesses 91a and 92a or the surfaces of the plate-like portions 31 and 32 opposite to the plate surfaces 31a and 32a, the plate-like portions 31 and 32 are fastened. May be arranged. Further, when the plate-like parts 31 and 32 are made of metal, for example, the jigs 91 and 92 may be magnetized and adsorbed by a magnetic force.

  As mentioned above, although several embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1,1A Electric wire with a terminal 10 Covered electric wire 11 Core wire 12 Coating 13 Core wire exposed part 20 Terminal 21 Conductor connection part 21a Plate surface 22 Connection part 22a Screw insertion hole 23, 24 End surface 25 Side edge part 31, 32 Plate-like part 31a, 32a Plate surface 80 Anvil 81 Welding horn 91, 92 Jig 91a, 92a Recess

Claims (7)

An electric wire with a terminal formed by connecting a terminal to a conductor constituting the electric wire by ultrasonic welding,
The terminal is
A connecting portion connected to the connected member;
A flat conductor connecting portion formed on the base end side of the connecting portion and connected to the conductor;
A terminal-attached electric wire comprising: a pair of plate-like portions arranged separately on the side of the conductor connection portion and connected to the conductor. The said plate-shaped part is arrange | positioned at the side end surface side of the said conductor connection part. The electric wire with a terminal of Claim 1 characterized by the above-mentioned. The said plate-shaped part is arrange | positioned on the side edge part of the conductor mounting side plate surface of the side of the said conductor connection part. The electric wire with a terminal of Claim 1 characterized by the above-mentioned. A terminal connected to a conductor constituting an electric wire is a method for producing a terminal-attached electric wire in which the conductor of the electric wire is connected by ultrasonic welding,
Placing the flat conductor connecting portion of the terminal on the anvil provided in the ultrasonic welding apparatus and arranging the terminal;
A step of arranging a plate-like portion made of a plate-like member on the opposing surface side of a pair of jigs arranged opposite to the side of the conductor connection portion;
Arranging the conductor of the electric wire on the conductor connecting portion placed on the anvil; and
Pressing the conductor connecting portion from the side with the pair of jigs;
Inserting a horn of the ultrasonic welding device between the pair of jigs from the direction facing the plate surface of the conductor connection portion toward the conductor;
And a step of ultrasonically welding the conductor connection portion and the plate-like portion while pressing the conductor toward the anvil by the horn. The method of manufacturing a terminal-attached electric wire according to claim 4, wherein, in the pressing step, a side end surface of the conductor connecting portion is pressed through the plate-like portion. 5. The method of manufacturing a terminal-attached electric wire according to claim 4, wherein in the pressing step, the plate-like portion is pressed so as to be disposed on a side edge portion of a conductor placement side plate surface on a side of the conductor connection portion. . The step of disposing the plate-like portion includes fitting and arranging the plate-like portion in a recess provided on each of the opposing surfaces of the pair of jigs. Of manufacturing electric wires with terminals.

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