JP2016185009A - Connection method of wire, connection device, and wire with terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection method of wires capable of connecting core lines of a plurality of wired or element lines of stranded wires constituting a core line of a wire in an excellent state in which secure conductivity is secured, a connection device, and a wire with a terminal.SOLUTION: When clamping a wire 1 placed on a wire disposition part 110 of a horn 11 in an ultrasonic welding device 10 with a movable guide 12 and an anvil plate 13, the wire is clamped in a state where a wire disposition direction D of the wire 1 is crossed with a crossing angle θ1 with respect to a vibration direction V of the horn 11, and then the wire is clamped with the horn 11 and an anvil 14. After then, core lines 2 of a plurality of wires 1 clamped with the horn 11 and the anvil 14 are welded with an ultrasonic wave by using an ultrasonic vibration generated from the horn 11.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a connection method, a connection device, and a terminal for an electric wire used when ultrasonically welding core wires in a plurality of electric wires constituting a wire harness for an automobile or strands of stranded wires constituting a core wire in an electric wire. It is related with an attached electric wire.

An electrical equipment equipped in an automobile or the like constitutes an electrical circuit by connecting to another electrical equipment or a power supply device via a wire harness in which a plurality of electric wires are bundled. At this time, the wire harness and the electrical equipment and the power supply device are connected to each other by connectors attached thereto.
As a method of connecting a plurality of electric wires constituting the above-described wire harness, a method called a concentration joint is adopted in which core wires of a plurality of electric wires are bundled and welded. Since this concentrated joint can easily connect a plurality of electric wires, it is widely used in wire harnesses for automobiles and the like.

  In particular, in recent years, as a connection method that allows easy and reliable connection between core wires in a plurality of electric wires, for example, a patent for ultrasonic welding of exposed core wires by removing the insulation coating of connection portions of the electric wires The manufacturing method of the electric wire with a terminal of patent document 2 which ultrasonically welds the electric wire connection structure in the wire harness of literature 1, and an electric wire and a terminal metal fitting is proposed.

  However, for example, as shown in FIG. 14, in a plurality of electric wires 1 having one end connected to the terminal 4, the core wires 3 exposed at the other end of the electric wire 1 are sandwiched between a horn 211 and an anvil 214 and ultrasonic waves are obtained. When welding, if the longitudinal direction L of the electric wire 1 and the terminal 4 and the vibration direction V of the ultrasonic vibration oscillated from the horn 211 coincide with each other, the ultrasonic vibration oscillated from the horn 211 causes the core wire 2 to oscillate. Therefore, the terminal 4 is likely to be deformed (distorted). Further, when the terminal 4 is deformed, for example, a contact failure may occur in a contact portion such as a contact piece.

JP 2000-188018 A JP 2014-143177 A

  This invention is a wire connection method, a connection device, and a wire connection method that can connect core wires of a plurality of electric wires or strands of stranded wires constituting the core wires of the electric wires in a good state in which reliable conductivity is ensured, and It aims at providing the electric wire with a terminal.

  In the present invention, ultrasonic waves are obtained by sandwiching strands of strands constituting a core wire at the other end of a plurality of electric wires or a core wire at the other end of the electric wires with terminals connected to at least one end between a horn and an anvil. A method for connecting electric wires to be welded, characterized in that ultrasonic welding is performed in a state in which the longitudinal direction of the electric wires intersects the vibration direction of ultrasonic vibration oscillated from the horn at a predetermined crossing angle. And

  The said electric wire matches the longitudinal direction of this electric wire and a terminal, and connected the terminal to the end of an electric wire. In addition, the core wire is a concept including, for example, a stranded wire obtained by twisting a plurality of strands such as an aluminum strand, an aluminum alloy strand, a copper strand, a copper alloy strand, or a single wire. In addition, the intersection is a concept including, for example, a direction intersecting obliquely with respect to the vibration direction of ultrasonic vibration oscillated from the horn, or a direction orthogonal thereto.

According to the present invention, the core wires of the plurality of electric wires or the strands of the stranded wire constituting the core wires of the electric wires can be connected to each other in a good state where reliable conductivity is ensured.
Specifically, when sandwiching the strands of the strands constituting the core wires of the other ends of the plurality of electric wires with terminals connected to one end or the core wires of the wires between the horn and the anvil, the longitudinal direction of the wires is determined. It is held in a state where it intersects at a predetermined intersection angle with respect to the vibration direction of the ultrasonic vibration oscillated from the horn. Thereafter, the core wires sandwiched between the horn and the anvil are ultrasonically welded by ultrasonic vibration generated from the horn.

  That is, since the longitudinal direction of the electric wire intersects the vibration direction of the horn, the vibration component (stress) in the direction parallel to the longitudinal direction of the electric wire or the terminal of the ultrasonic vibration intersects the vibration direction of the horn. Because the component is distributed or dispersed in the direction, the vibration component of ultrasonic vibration parallel to the longitudinal direction of the wire or terminal is propagated to the wire or terminal side, but the vibration component perpendicular to the longitudinal direction of the wire or terminal is the terminal. Hardly propagates to the side.

  For this reason, the amplitude of the ultrasonic vibration propagating to the terminal is smaller when the longitudinal direction of the electric wire intersects the vibration direction of the horn than when the longitudinal direction of the electric wire is parallel to the vibration direction of the horn. be able to.

Thereby, it can prevent that a deformation | transformation (distortion) arises in the terminal connected to the electric wire. In addition, it is possible to prevent fatigue failure from occurring at a relatively weak portion of the terminal.
As a result, without causing deformation or fatigue destruction of the terminals connected to the electric wires, the core wires in the plurality of electric wires or the strands of the stranded wires constituting the core wires in the electric wires are in a good state in which reliable conductivity is ensured. Can be connected.

As an aspect of the present invention, an intersecting angle between the longitudinal direction of the electric wire and the vibration direction of the ultrasonic vibration can be set to an angle included in a range of 60 degrees to 90 degrees with respect to the vibration direction. .
According to the present invention, the core wires of the plurality of electric wires or the strands of the stranded wires constituting the core wires of the electric wires can be accurately connected in a good state in which reliable conductivity is ensured.

Specifically, when the core wires of a plurality of electric wires or the strands of stranded wires constituting the core wires of the electric wires are sandwiched between a horn and an anvil, the longitudinal direction of the electric wires is 60 degrees to the vibration direction of ultrasonic vibration. Intersecting and sandwiching at an angle included in the range of 90 degrees.
That is, by reducing the vibration component parallel to the longitudinal direction of the electric wire in the ultrasonic vibration, the vibration propagated to the terminal connected to the electric wire can be further reduced.

  As a result, the vibration propagated to the terminal is attenuated and the amplitude of the terminal can be suppressed, so that the terminal can be more reliably prevented from being deformed or fatigued.

  When the above-mentioned crossing angle is set to 90 degrees, the vibration direction of the ultrasonic vibration and the longitudinal direction of the electric wire and the terminal are orthogonal to each other, and it is difficult for the vibration to propagate to the terminal side. it can. Thereby, it can prevent more reliably that a deformation | transformation and fatigue failure occur in the terminal connected to the electric wire.

Moreover, as an aspect of the present invention, a joint terminal that covers the core wire converging portion is formed on a core wire converging portion in which the core wires in the plurality of electric wires or strands of stranded wires constituting the core wire in the electric wires are bundled together. It can be mounted in a conductive manner.
The joint terminal is a concept including, for example, a cylindrical terminal having both ends opened or a terminal having one end opened.

According to this invention, it is connected to a good state in which reliable conductivity is ensured while constraining the core wires of the plurality of electric wires or the strands of the stranded wires constituting the core wires of the electric wires to one bundle. can do.
In detail, the core wire converging part which bundled together the strands of the strand wire which comprises the core wire in several electric wires or the core wire in an electric wire was covered with the joint terminal, and the core wires of the core wire converging part were bundled into one. After constraining the state, the core wire converging portion is covered with the joint terminal, and sandwiched between the horn and the anvil, and ultrasonic welding is performed.

For this reason, arrangement | positioning of the strands of the strand wire which comprises the core wire in several electric wires or the core wire in an electric wire displaces in the direction parallel to the longitudinal direction of an electric wire, for example, or the direction which cross | intersects this longitudinal direction etc. Thus, it can be surely prevented from becoming irregular.
As a result, it is possible to perform ultrasonic welding accurately in a good state in which reliable conductivity is ensured while the core wires of the plurality of electric wires or the strands of the stranded wires constituting the core wires of the electric wires are bundled together. it can.

Moreover, since the core wire converging part is ultrasonically welded while being covered with the joint terminal, at the time of ultrasonic welding, the molten metal of the core wire can be prevented from flowing out from the part covered with the joint terminal, and the wires in the horn and the anvil can be connected. It is possible to prevent the molten metal of the core wire from adhering to the sandwiched portion.
In other words, since the conditions when ultrasonic welding the core wires of the plurality of electric wires or the strands of the strand wires constituting the core wires of the electric wires can be kept constant, the operation of connecting the core wires in the core wire converging part is stable. You can do it.

Moreover, as an aspect of this invention, the unevenness | corrugation which cross | intersects with respect to the longitudinal direction of the said electric wire can be provided in the part which clamps the said electric wire of at least one among the said horn and the said anvil.
The said unevenness | corrugation is the concept containing the processus | protrusion formed in the twill shape, the wave shape, or a groove part, for example.

According to this invention, the strands of the strand wire which comprises the core wire in a some electric wire or the core wire in an electric wire can be connected in the favorable state by which reliable electroconductivity is ensured.
Specifically, when the horn and the anvil sandwich the core wires of the plurality of electric wires or the strands of the stranded wire constituting the core wires of the electric wire, the unevenness provided in the portion of the horn and the anvil that holds the electric wires is The core wires can be clamped more reliably by intersecting with the longitudinal direction of the core wire and biting into the core wire of the core wire converging portion.

Thereby, since the ultrasonic vibration oscillated from the horn can be reliably transmitted to the core wires in the core wire converging portion, the core wires can be ultrasonically welded more reliably.
As a result, without depending on the arrangement of the core wires, the core wires in the plurality of electric wires or the strands of the stranded wires constituting the core wires in the electric wires are ultrasonically welded in a good state in which more reliable conductivity is ensured. be able to.

  Moreover, at the time of ultrasonic welding, the arrangement and position of the core wires sandwiched between the horn and the anvil can be reliably prevented from being displaced, and the strands of the stranded wires constituting the core wires in the plurality of electric wires or the core wires in the electric wires The operation of ultrasonic welding of each other can be performed more accurately.

  Also, the present invention is an ultrasonic welding method in which terminals are connected to at least one end, and core wires of a plurality of electric wires or strands of stranded wires constituting the core wires of an electric wire are sandwiched between a horn and an anvil arranged vertically. A wire connecting device for arranging the wires so that a longitudinal direction of the wires is a desired direction, and a predetermined intersection with a vibration direction of ultrasonic vibration oscillated from the horn. An electric wire restricting portion for restricting to an angle crossing the angle is provided.

According to the present invention, the core wires of the plurality of electric wires or the strands of the stranded wire constituting the core wires of the electric wires can be accurately connected in a good state in which reliable conductivity is ensured.
Specifically, the wire arrangement in which the wires are arranged when the horn and the anvil sandwich the strands of the stranded wires constituting the core wires of the other ends of the plurality of wires with the terminals connected to one end or the core wires of the wires. The direction is regulated by the wire regulating unit at an angle that intersects a predetermined intersection angle with respect to the vibration direction of the ultrasonic vibration oscillated from the horn.

  That is, the wire oscillates from the horn while the wire restricting portion regulates the wire arrangement direction of the wire to an angle that intersects a predetermined crossing angle with respect to the vibration direction of the horn so that the longitudinal direction of the wire becomes a desired direction. The strands of the strands constituting the core wires of the plurality of electric wires or the core wires of the electric wires are ultrasonically welded by ultrasonic vibration.

That is, the wire arrangement direction of the wire is regulated by the wire regulating unit at an angle that intersects the vibration direction of the horn, so that the vibration component parallel to the longitudinal direction of the wire and the terminal in the ultrasonic vibration is However, the vibration component perpendicular to the longitudinal direction of the wire or terminal hardly propagates to the terminal side.
For this reason, the amplitude of the ultrasonic vibration propagating to the terminal can be made smaller than when the longitudinal direction of the electric wire is made parallel to the vibration direction of the horn.

  Furthermore, it is possible to prevent the terminal connected to the electric wire from being deformed. In addition, it is possible to prevent fatigue failure from occurring at a relatively weak portion of the terminal.

  As a result, without deforming or fatigue-breaking the terminals connected to the electric wires, the core wires in the plurality of electric wires or the strands of the stranded wires constituting the core wires in the electric wires are in a good state in which reliable conductivity is ensured. While being able to connect correctly, a connection precision can be improved.

  As an aspect of the present invention, the wire restricting portion is placed on one side of the horn so as to face one side of the electric wire placed on the horn, and placed on the horn. The other side of the electric wire is opposed to the anvil plate disposed on the other side of the horn, and the movable guide and the anvil plate are arranged in a direction to sandwich the electric wire placed on the horn. It can be provided to be relatively movable.

According to the present invention, the core wires of the plurality of electric wires or the strands of the stranded wires constituting the core wires of the electric wires can be accurately connected in a good state in which reliable conductivity is ensured.
Specifically, the core wires of a plurality of electric wires placed on the horn or the strands of stranded wires constituting the core wires of the electric wire are sandwiched between a movable guide and an anvil plate, and the electric wire arrangement direction of the electric wires is determined. The angle is controlled to an angle that intersects a predetermined intersection angle with respect to the vibration direction of the ultrasonic vibration oscillated from.

  That is, the core wires in the plurality of electric wires are subjected to ultrasonic vibration generated from the horn while the electric wire arrangement direction of the electric wires is regulated by the movable guide and the anvil plate at an angle crossing a predetermined crossing angle with respect to the vibration direction of the horn. The strands of the strands constituting the core wires of the wires or the electric wires are ultrasonically welded.

  That is, by reducing the vibration component parallel to the longitudinal direction of the electric wire in the ultrasonic vibration, the vibration component propagated to the terminal side can be reduced, and the vibration applied to the terminal can be suppressed.

  As a result, without deforming or fatigue-breaking the terminals connected to the electric wires, the core wires in the plurality of electric wires or the strands of the stranded wires constituting the core wires in the electric wires are in a good state in which reliable conductivity is ensured. While being able to connect correctly, a connection precision can be improved.

  Moreover, as an aspect of the present invention, in the state in which the wire regulating portion is sandwiched between the core wires in the plurality of electric wires or strands of stranded wires constituting the core wire in the electric wires, the electric wire arrangement direction of the electric wires and the wire The crossing angle at which the ultrasonic vibration intersects with the vibration direction can be configured as a surface that regulates the angle within the range of 60 degrees to 90 degrees with respect to the vibration direction.

According to the present invention, the core wires of the plurality of electric wires or the strands of the stranded wires constituting the core wires of the electric wires can be accurately connected in a good state in which reliable conductivity is ensured.
Specifically, the wires of the electric wires are sandwiched between the core wires of the plurality of electric wires placed on the horn or between the strands of the stranded wires constituting the core wires of the electric wires on the surface that regulates the electric wires in the movable guide and the anvil plate. The arrangement direction is surely restricted to an angle included in the range of 60 to 90 degrees with respect to the vibration direction of the horn.

  As a result, the crossing angle of the electric wires with respect to the vibration direction of the horn can be reliably prevented from being displaced to an angle in a range not included in the above-described crossing angles, and a plurality of electric wires and a single electric wire are restricted to a predetermined crossing angle. As a result, ultrasonic welding can be performed more accurately.

Moreover, as an aspect of this invention, the uneven | corrugated | grooved part which cross | intersects with respect to the electric wire arrangement | positioning direction of the said electric wire can be provided in the part which clamps the said electric wire of at least one among the said horn and the said anvil.
Moreover, the uneven | corrugated | grooved part which cross | intersects with respect to the electric wire arrangement | positioning direction of the said electric wire can be provided in the part which clamps at least one said electric wire among the said movable guide and the said anvil plate.

  Specifically, when a plurality of electric wires or electric wires are sandwiched between the movable guide and the anvil plate, the unevenness provided on the horn and the anvil is caused to bite into the electric wires from above and below. Moreover, the unevenness | corrugation provided in the movable guide and the anvil plate is made to bite into the electric wire from the left and right.

  Thereby, since the ultrasonic vibration oscillated from the horn can be more reliably propagated to the core wires or the strands in the core wire converging part, the twists constituting the core wires in the plurality of electric wires or the core wires in the electric wires. It is possible to ultrasonically weld the strands of the wires more reliably.

As a result, the crossing angle of the electric wires with respect to the vibration direction of the horn can be prevented more reliably, and the vibration applied to the terminals can be more reliably suppressed, so that the core wires in the plurality of electric wires or the core wires in the electric wires can be prevented. It is possible to ultrasonically weld the strands of the stranded wire constituting the wire.
And since the biting force by the unevenness | corrugation of the upper and lower sides and right and left is obtained in synergy, the core wires in a some electric wire or the strands of the strand wire which comprises a core wire in an electric wire can be clamped more reliably.

  The present invention also relates to a terminal-attached electric wire in which terminals are connected to at least one end and ultrasonically welded strands of strands constituting core wires at the other end of the plurality of electric wires or core wires at the other end of the electric wires. A concave and convex indentation is formed in a direction crossing the longitudinal direction of the electric wire at a location where ultrasonic welding is performed on the electric wire.

  According to the present invention, it is possible to provide an electric wire with a terminal in which core wires in a plurality of electric wires or strands of stranded wires constituting the core wires in the electric wires are connected in a good state in which reliable conductivity is ensured. .

  According to this invention, the connection method and connection device of the electric wire which can connect the core wires in a plurality of electric wires or the strands of the stranded wire constituting the core wires in the electric wires in a good state in which reliable conductivity is ensured And an electric wire with a terminal can be provided.

Explanatory drawing of the electric wire which connected the terminal to the end in Example 1. FIG. Explanatory drawing of the part which attached the joint terminal to the electric wire. The perspective view of the part which welds the electric wire in the ultrasonic welding apparatus of Example 1. FIG. The top view which shows the state just before clamping the core wire condensing part of an electric wire. The top view which shows the state immediately after clamping the core wire condensing part of an electric wire. Sectional drawing which cut | divided the part which made the up-and-down convex part bite and ultrasonically welded it to the vibration direction. The expanded sectional view of the part which attached the insulation cap to the welding part of the electric wire. The perspective view of the part which welds the electric wire in the ultrasonic welding apparatus of Example 2. FIG. The top view which shows the state just before clamping an electric wire with an ultrasonic welding apparatus. The top view which shows the state immediately after clamping an electric wire with an ultrasonic welding apparatus. Sectional drawing which cut | disconnected the part which made the upper and lower, right and left convex part of Example 3 bite, and was ultrasonically welded in the vibration direction. Explanatory drawing which shows the result of having changed the crossing angle of the electric wire with respect to the vibration direction of a horn, and measuring the amplitude of the vibration which propagates to a terminal. Explanatory drawing which shows the range of the crossing angle of the electric wire which can be ultrasonically welded. Explanatory drawing of the conventional electric wire connection method and ultrasonic welding apparatus.

An embodiment of the present invention will be described in detail with reference to the drawings.
Example 1
FIG. 1 is an explanatory diagram of an electric wire 1 in which a terminal 4 is connected to one end in the first embodiment, FIG. 2 is an explanatory diagram of a portion where a joint terminal 21 is attached to the electric wire 1, and FIG. FIG. 2B is an enlarged plan view showing a state where the joint terminal 21 is attached to the core wire converging part 20 of the electric wire 1.

  The electric wire 1 of Example 1 is obtained by covering the outer surface of a conductive core wire 2 with an insulating coating 3 having insulating properties. The core wire 2 is composed of a stranded wire formed by twisting a plurality of aluminum strands 2a to 1.05 sq to 15 sq (square millimeters) (see FIG. 1).

  One end of the electric wire 1 in the longitudinal direction L is connected in a state in which the crimping portion 40 of the terminal 4 is crimped and crimped to match the longitudinal direction L of the electric wire 1 and the terminal 4. At the other end of the electric wire 1 in the longitudinal direction L, the insulating coating 3 on the other end side is removed 15 mm to expose the core wire 2 (see FIG. 1).

The terminal 4 includes a crimping part 40 for crimping and crimping one end of the electric wire 1 (core wire 2), a box part 41 into which a connection piece of a male terminal (not shown) is inserted, and a contact part 42 formed in the box part 41. It consists of and.
The contact portion 42 includes upper and lower contact pieces 43 and 44 having elasticity and a connecting portion 45 that connects the contact pieces 43 and 44 (see FIG. 1).

  In addition, the electric wire 1 forms a core wire converging unit 20 by bundling the core wires 2 exposed at the other ends of the plurality of electric wires 1 and ultrasonically welds the core wire converging unit 20 with the joint terminal 21 covered. Thus, for example, it is possible to configure a wire harness (not shown) that is used when connecting an electrical equipment installed in an automobile and a power supply device (see FIG. 2).

The joint terminal 21 is a cylindrical terminal made of a conductive metal and having both ends opened. The inside of the joint terminal 21 opens to a size and a shape that allow insertion of the core wire converging unit 20 formed by bundling the core wires 2 of the plurality of electric wires 1 into one (see FIG. 2).
In the embodiment, 15 mm of the insulating coating 3 on the other end side of the electric wire 1 is removed to expose the core wire 2 on the other end side, so that the length of the joint terminal 21 is 5 mm to 12 mm.

The ultrasonic welding apparatus 10 used when connecting the some electric wire 1 comprised as mentioned above is demonstrated.
3 is a perspective view of a portion where ultrasonic welding is performed on the electric wire 1 in the ultrasonic welding apparatus 10 of the first embodiment, FIG. 4 is a plan view showing a state immediately before the core wire converging portion 20 of the electric wire 1 is sandwiched, and FIG. FIG. 6 is a cross-sectional view in which the ultrasonic welded portion of the electric wire 1 is divided in the vibration direction V, and FIG. 7 is a welded portion of the electric wire 1 with the insulating cap 23. 22 is an enlarged cross-sectional view of a portion attached to 22. FIG.

  The ultrasonic welding apparatus 10 includes a horn 11 for placing a plurality of electric wires 1, a movable guide 12 for pressing the electric wires 1 placed on the horn 11 against an anvil plate 13 described later, and a horn 11. The anvil plate 13 that holds the electric wire 1 held between the movable guide 12, the anvil 14 that vertically pressurizes the electric wire 1 placed on the horn 11, and the movable guide 12, the anvil plate 13, and the anvil 14 are moved. A moving mechanism (not shown) and an ultrasonic transmitter (not shown) for applying ultrasonic vibration to the horn 11 are provided (see FIGS. 3 to 5).

  The horn 11 is configured to vibrate ultrasonically by an ultrasonic oscillator (not shown), and intersects the electric wire arrangement direction D (or the longitudinal direction L) of the electric wire 1 placed on the electric wire arrangement unit 110 of the horn 11. Ultrasonic vibration is oscillated in the vibration direction V (see FIGS. 3 to 5).

  A portion of the horn 11 that faces the anvil 14 is formed with a wire arrangement portion 110 on which a core wire converging portion 20 is formed by bundling the core wires 2 of the plurality of electric wires 1 together. The electric wire arrangement part 110 is formed in a size that is substantially parallel to and substantially flat with the electric wire pressing part 140 of the anvil 14 to be described later, and that is capable of mounting the core wire converging part 20 (FIG. 3). To FIG. 5).

  The electric wire arrangement part 110 of the horn 11 is formed with a convex part 111 having a substantially triangular cross section protruding upwards in a cross-hatched shape. A large number of convex portions 111 are arranged in an arrangement that intersects the electric wire arrangement direction D of the electric wire 1 placed on the electric wire arrangement section 110 (see FIGS. 4 to 6).

  The movable guide 12 is disposed on the opposite side to the anvil plate 13 (described later) in opposition to one side of the electric wire 1 placed on the electric wire arrangement part 110 of the horn 11 (left side in FIGS. 3 to 5). ). Further, the movable guide 12 is provided so as to be movable in parallel with the electric wire arrangement part 110 of the horn 11 and in a direction intersecting the electric wire arrangement direction D of the electric wire 1 placed on the electric wire arrangement part 110. (See FIGS. 3 to 5).

  In the portion of the movable guide 12 that faces the anvil plate 13, there is an electric wire holding portion 120 that holds the core wire converging portion 20 of the electric wire 1 placed on the electric wire arrangement portion 110 of the horn 11 with the anvil plate 13 described later. Forming.

  The electric wire clamping unit 120 is inclined at an intersecting angle θ1 (60 degrees) that obliquely intersects the vibration direction V of the horn 11, and the electric wire arrangement direction D of the electric wire 1 placed on the electric wire arrangement unit 110 of the horn 11. (See FIG. 5).

The movable guide 12 configured as described above is provided so as to be movable left and right in a direction approaching and moving away from the anvil plate 13.
That is, the movable guide 12 is moved toward the anvil plate 13 so that the core wire converging portion 20 of the electric wire 1 placed on the electric wire arranging portion 110 of the horn 11 is moved to the movable guide 12 and the anvil plate. 13 (see FIGS. 5 and 6).

  The anvil plate 13 faces the other side of the electric wire 1 placed on the electric wire arrangement part 110 of the horn 11 and is arranged on the opposite side (right side part of the horn 11) from the above-mentioned movable guide 12 (see FIG. 3 to the right in FIG.

  Moreover, the anvil plate 13 is movable up and down along a vertical plane parallel to the electric wire arrangement direction D of the electric wire 1 placed on the electric wire arrangement part 110 of the horn 11 in parallel with the right side portion of the horn 11. (See FIGS. 3 to 5).

  In the portion of the anvil plate 13 that faces the movable guide 12, the electric wire holding portion 130 that holds the core wire converging portion 20 of the electric wire 1 placed on the electric wire placement portion 110 of the horn 11 with the above-described movable guide 12. Is forming.

  The electric wire clamping unit 130 is inclined at an intersecting angle θ1 (60 degrees) that obliquely intersects the vibration direction V of the horn 11, and the electric wire arrangement direction D of the electric wire 1 placed on the electric wire arrangement unit 110 of the horn 11. (See FIG. 5).

  The anvil 14 is arranged above the horn 11 and the anvil plate 13 so as to face the electric wire 1 placed on the electric wire arrangement part 110 of the horn 11 (upper side in FIG. 3). Further, the anvil 14 is provided so as to be movable in the vertical direction and the horizontal direction along a vertical plane orthogonal to the electric wire arrangement direction D of the electric wire 1 placed on the electric wire arrangement part 110 of the horn 11 (FIG. 3). (See FIG. 5).

  An electric wire pressing portion 140 that presses the core wire converging portion 20 of the electric wire 1 placed on the electric wire arranging portion 110 of the horn 11 is formed in a portion of the anvil 14 facing the horn 11. The electric wire pressing portion 140 is formed to be substantially parallel to the electric wire arrangement portion 110 of the horn 11 and substantially flat, and to have a size capable of pressing the core wire converging portion 20 placed on the electric wire arrangement portion 110. (See FIGS. 3 to 5).

  The electric wire pressing portion 140 of the anvil 14 is formed with a convex portion 141 having a substantially triangular cross-section projecting downward in a twill shape. A large number of convex portions 141 are arranged in an arrangement that intersects the electric wire arrangement direction D of the electric wires 1 placed on the electric wire arrangement portion 110 of the horn 11 (see FIGS. 4 to 6).

The anvil 14 configured as described above is provided so as to be vertically movable and horizontally movable in a direction approaching and moving away from the horn 11 and the movable guide 12.
That is, by moving the anvil 14 in a direction approaching the horn 11, the core wire converging portion 20 placed on the wire arrangement portion 110 of the horn 11 can be held between the horn 11 and the anvil 14.

A connection method for constructing a wire harness (not shown) by ultrasonic welding of a plurality of electric wires 1 using the ultrasonic welding apparatus 10 configured as described above will be described.
Here, after the core wire converging part 20 formed by bundling the core wires 2 of the plurality of electric wires 1 is covered with the joint terminal 21 in advance, the joint terminal 21 may be crimped and crimped to the core wire converging part 20. Good (see FIGS. 1 and 2).

  That is, since the core wires 2 in the plurality of electric wires 1 are temporarily fixed to the joint terminal 21 in a bundled state, the arrangement and positions of the core wires 2 and the strands 2a are not uniform until ultrasonic welding is performed. Can be prevented.

  The core wire converging portion 20 temporarily fixed by the joint terminal 21 is inserted between the movable guide 12 and the anvil plate 13 which are separated from each other in the ultrasonic welding apparatus 10, and the wire arrangement portion 110 of the horn 11 is inserted. Place (see FIGS. 4 and 5).

  Thereafter, the movable guide 12 is moved in a direction approaching the anvil plate 13, and the core wire converging part 20 placed on the electric wire arranging part 110 of the horn 11 is pressed against the electric wire holding part 130 of the anvil plate 13. At the same time, the core converging unit 20 is clamped by the movable guide 12 and the electric wire clamping units 120 and 130 of the anvil plate 13.

  Thereby, the crossing which cross | intersects the electric wire arrangement | positioning direction D which arrange | positions this electric wire 1 diagonally with respect to the vibration direction V of the horn 11 so that the longitudinal direction L of this electric wire 1 may turn into a desired direction. Temporarily restrict the angle θ1 (60 degrees) (see FIGS. 3 and 5).

  Subsequently, the anvil 14 is moved in a direction approaching the horn 11, and the electric wire pressing portion 140 of the anvil 14 is pressed against the core wire converging portion 20 placed on the electric wire arranging portion 110 of the horn 11 from above. At the same time, the core wire converging part 20 is pressed against the electric wire arranging part 110 of the horn 11 by the pressing force (4 kN) of the anvil 14.

  Further, the twill-shaped convex portion 111 projecting to the electric wire arranging portion 110 and the twill-shaped convex portion 141 projecting to the electric wire pressing portion 140 are bitten into the core wire 2 in the core wire converging portion 20 from above and below via the joint terminal 21. Therefore, the ultrasonic vibration oscillated from the horn 11 can be reliably propagated to the core wires 2 and the strands 2a in the core wire converging unit 20 (see FIG. 6).

  In addition, on the upper and lower outer surfaces of the joint terminal 21 that is crimped to the core wire converging portion 20, uneven impressions in which the convex portions 111 and 141 are bitten in the direction (short axis direction) orthogonal to the electric wire arrangement direction D of the electric wire 1 remain. .

  Thereby, the joint terminal 21 can be reliably crimped and connected to the core wire 2 in the core wire converging unit 20, and the plurality of electric wires 1 can be connected to the electric wire arrangement direction D of the electric wires 1 with respect to the vibration direction V of the horn 11. Thus, it is possible to restrict the crossing to a predetermined crossing angle θ1. (See FIGS. 3 and 5).

  As described above, the plurality of electric wires 1 are sandwiched between the horn 11 and the anvil 14 by the ultrasonic vibration oscillated from the horn 11 while being restricted to the crossing angle θ1 that obliquely intersects the vibration direction V of the horn 11. The welded portions 22 are formed by ultrasonically welding the core wires 2 and the strands 2a of the core wire converging portion 20 that have been performed.

  After the ultrasonic welding by the ultrasonic welding apparatus 10 is completed, the movable guide 12 is moved in a direction away from the anvil plate 13, and the anvil 14 is moved in a direction away from the horn 11. By taking out the plurality of connected electric wires 1 from the ultrasonic welding apparatus 10, a wire harness (not shown) can be configured.

After ultrasonic welding, an insulating cap 23 covering the welded portion 22 is attached to a welded portion 22 formed by ultrasonically welding the core wires 2 of the plurality of electric wires 1, and then a silicon resin-based waterstop agent 24 is attached. The insulating cap 23 is filled and water-stopped.
Further, the insulating tape 25 is wound around and fixed to the electric wire 1 bundled from above the protruding piece 23a formed on the insulating cap 23 (see FIG. 7).
The indentation on the core wire converging unit 20 or the joint terminal 21 increases the degree of adhesion with the water stop agent 24.

  By the connection method using the ultrasonic welding apparatus 10 described above, the plurality of electric wires 1 are controlled by the ultrasonic vibration oscillated from the horn 11 while the plurality of electric wires 1 are restricted to the crossing angle θ1 with respect to the vibration direction V of the horn 11. 1 are ultrasonically welded together.

  That is, since the vibration component (stress) in the direction parallel to the longitudinal direction L of the electric wire 1 and the terminal 4 in the ultrasonic vibration is divided or dispersed in the direction intersecting with the vibration direction V of the horn 11, the ultrasonic vibration Among them, the vibration component parallel to the longitudinal direction L of the electric wire 1 and the terminal 4 propagates to the electric wire 1 and the terminal 4 side, but the vibration component perpendicular to the longitudinal direction L of the electric wire 1 and the terminal 4 hardly propagates to the terminal 4 side. .

For this reason, the amplitude of the ultrasonic vibration propagating to the terminal 4 can be made smaller than when the longitudinal direction L of the electric wire 1 is parallel to the vibration direction V of the horn 11.
Thereby, it can prevent that a deformation | transformation (distortion) arises in the terminal 4 connected to the end of the electric wire 1, for example, contact parts 42, such as contact piece 43,44. Further, it is possible to prevent fatigue failure from occurring in a portion where the terminal 4 is easily vibrated such as the connecting portion 45 or a portion having a relatively low strength.

  As a result, it is possible to connect the plurality of electric wires 1 to each other in a good state in which reliable conductivity is ensured without deforming or fatigue-breaking the terminals 4 connected to the electric wires 1, and illustrating a good connection state. A wire harness can be configured.

Moreover, the horn 11 oscillates in order to cause the convex portion 111 protruding to the electric wire placement portion 110 and the convex portion 141 protruding to the electric wire pressing portion 140 to bite into the core wire 2 in the core wire converging portion 20 via the joint terminal 21. The ultrasonic vibration can be reliably propagated to the core wires 2 and the strands 2a in the core wire converging unit 20.
In addition, it is possible to reliably prevent the intersection angle θ1 of the electric wire 1 from displacing with respect to the vibration direction V of the horn 11 and to more reliably suppress vibration applied to the terminal 4.

  Furthermore, since ultrasonic welding is performed with the core wire converging part 20 covered with the joint terminal 21, the arrangement and position of the core wires 2 and the strands 2a in the core wire converging part 20 are, for example, electric wires before ultrasonic welding is performed. Thus, it is possible to reliably prevent irregularity such as displacement in a direction parallel to one electric wire arrangement direction D or in a direction intersecting with the electric wire arrangement direction D.

  Furthermore, the molten metal of the core wire 2 can be prevented from flowing out from the portion covered with the joint terminal 21, and the molten metal of the core wire 2 adheres to the electric wire placement portion 110 of the horn 11 and the electric wire pressing portion 140 of the anvil 14. Can be prevented.

  Thereby, since the conditions at the time of ultrasonic welding by the ultrasonic welding apparatus 10 can be always kept constant, the operation of ultrasonically connecting the core wires 2 and the strands 2a in the core wire converging unit 20 can be stably performed. .

  Furthermore, since the convex part 111 of the electric wire arrangement | positioning part 110 and the convex part 141 of the electric wire press part 140 bite into the core wire 2 in the core wire condensing part 20 via the joint terminal 21, the ultrasonic vibration oscillated from the horn 11 is carried out. Can be reliably transmitted to the core wires 2 and the strands 2a in the core wire converging unit 20. The joint terminal 21 can be more reliably crimped to the core wire 2, and more reliable conductivity can be ensured.

Furthermore, after attaching the insulating cap 23 which covers this welding part 22 to the welding part 22 formed by ultrasonically welding the core wires 2 in the some electric wire 1, the silicone resin type water stop agent 24 is attached to the insulating cap 23. Since it fills in, the insulation in the welding part 22 can be ensured, and while being able to prevent the welding part 22 from being accidentally short-circuited, it can stop water reliably.
Thereby, while being able to prevent the welding part 22 from corroding, insulation and water stop can be ensured over a long period of time.

  Hereinafter, the connection method of the electric wire 1 and other examples of the ultrasonic welding apparatus 10 will be described. In this description, parts that are the same as or equivalent to those in the above configuration are denoted by the same reference numerals, and detailed description thereof is omitted.

(Example 2)
In the above-described first embodiment, the connection method in which the plurality of electric wires 1 are ultrasonically welded in a state where the plurality of electric wires 1 are crossed at the crossing angle θ1 with respect to the vibration direction V of the horn 11 has been described. Next, a connection method and an ultrasonic welding apparatus 10 of Example 2 in which a plurality of electric wires 1 are ultrasonically welded in a state of intersecting the vibration direction V of the horn 11 with an intersecting angle θ2 (90 degrees) will be described.

  FIG. 8 is a perspective view of a portion for ultrasonic welding of the electric wire 1 in the ultrasonic welding apparatus 10 of the second embodiment, FIG. 9 is a plan view showing a state immediately before the core wire converging portion 20 of the electric wire 1 is sandwiched, and FIG. It is a top view which shows the state immediately after clamping the core wire condensing part 20 of 1.

  In the ultrasonic welding apparatus 10 according to the second embodiment, the wire holding portion 121 of the movable guide 12 and the wire holding portion 131 of the anvil plate 13 are configured by a plane orthogonal to the vibration direction V of the horn 11.

  That is, the wire holding portions 121 and 131 are formed at an intersecting angle θ2 (90 degrees) orthogonal to the vibration direction V of the horn 11, and the wire arrangement of the wire 1 placed on the wire placement portion 110 of the horn 11 It is formed on a surface parallel to the direction D (see FIG. 10).

A connection method for constructing a wire harness (not shown) by ultrasonic welding of a plurality of electric wires 1 using the ultrasonic welding apparatus 10 of Example 2 will be described.
First, the core wire 2 in the plurality of electric wires 1 is temporarily fixed with a joint terminal 21 formed by bundling them together, and the core wire converging unit 20 is moved between the movable guide 12 and the anvil plate 13 which are separated from each other in the ultrasonic welding apparatus 10. It inserts in between and mounts on the electric wire arrangement | positioning part 110 of the horn 11 (refer FIG. 9, FIG. 10).

  Thereafter, the movable guide 12 is moved in a direction approaching the anvil plate 13, and the core wire converging portion 20 placed on the electric wire placement portion 110 of the horn 11 is pressed against the electric wire holding portion 130 of the anvil plate 13. The core wire converging unit 20 is clamped by the movable guide 12 and the electric wire clamping units 121 and 131 of the anvil plate 13.

  As a result, the plurality of electric wires 1 are temporarily restricted to the crossing angle θ2 (90 degrees) orthogonal to the vibration direction V of the horn 11 in the electric wire arrangement direction D in which the electric wires 1 are arranged (see FIGS. 8 and 10). .

  Subsequently, the anvil 14 is moved in a direction approaching the horn 11, and the electric wire pressing portion 140 of the anvil 14 is pressed against the core wire converging portion 20 placed on the electric wire arranging portion 110 of the horn 11 from above. At the same time, the core wire converging part 20 is pressed against the wire arrangement part 110 of the horn 11 by the pressing force of the anvil 14.

  In addition, a horn is used to cause a large number of protrusions 111 protruding from the electric wire placement portion 110 and a large number of protrusions 141 protruding from the electric wire pressing portion 140 to bite into the core wire 2 in the core wire converging portion 20 from above and below via the joint terminals 21. 11 can be reliably propagated to the core wires 2 and the strands 2a in the core wire converging unit 20 (see FIG. 6).

  Thereby, the joint terminal 21 can be reliably crimped and connected to the core wire 2 in the core wire converging unit 20, and the plurality of electric wires 1 can be connected to the electric wire arrangement direction D of the electric wires 1 with respect to the vibration direction V of the horn 11. And can be held in a state orthogonal to the crossing angle θ2 (see FIGS. 8 and 10).

  As described above, while the plurality of electric wires 1 are restricted to the crossing angle θ2 orthogonal to the vibration direction V of the horn 11, the core wires 2 in the plurality of electric wires 1 are ultrasonicated by the ultrasonic vibration oscillated from the horn 11. Since welding is performed, ultrasonic vibration is less likely to be propagated to the terminal 4 than when ultrasonic welding is performed by restricting to the intersection angle θ1 as in the first embodiment.

  That is, even if the longitudinal direction L of the electric wire 1 and the terminal 4 are coincident, ultrasonic vibration is hardly propagated to the terminal 4 connected to one end of the electric wire 1, so that the vibration applied to the terminal 4 is further suppressed. Can do.

  Thereby, it can prevent more reliably that a deformation | transformation arises in the terminal 4 connected to the end of the electric wire 1, for example, contact parts 42, such as contact piece 43,44. In particular, it is possible to more reliably prevent fatigue failure from occurring in a portion where the terminal 4 is easily vibrated such as the connecting portion 45 or a portion having a relatively low strength.

  As a result, it is possible to connect the plurality of electric wires 1 to each other in a good state in which reliable conductivity is ensured without deforming or fatigue-breaking the terminals 4 connected to the electric wires 1, and illustrating a good connection state. Since the wire harness which does not carry out can be comprised, there can exist an effect | action and effect substantially equivalent to Example 1 or more than equivalent.

Example 3
In the above-described Examples 1 and 2, the method and apparatus in which the convex portion 111 is arranged in the electric wire arrangement portion 110 of the horn 11 and the convex portion 141 is arranged in the electric wire pressing portion 140 of the anvil 14 have been described. As described above, the connection method by the ultrasonic welding apparatus 10 according to the third embodiment in which the convex portion 121 is arranged in the electric wire holding portion 120 of the movable guide 12 and the convex portion 131 is arranged in the electric wire holding portion 130 of the anvil plate 13. explain.
FIG. 11 is a cross-sectional view in which the upper and lower convex portions 111 and 141 and the left and right convex portions 121 and 131 are bitten and ultrasonic welding is performed, so that the vibration direction V is divided.

  More specifically, when the core wire converging part 20 placed on the electric wire arrangement part 110 of the horn 11 is sandwiched from above and below by the horn 11 and the anvil 14, the convex part 111 protruding to the electric wire arrangement part 110 and the electric wire pressing part 140. The protruding portion 141 projecting into the core wire 2 is caused to bite into the core wire 2 in the core wire converging portion 20 from above and below via the joint terminal 21.

  Further, when the core converging unit 20 is clamped from the left and right by the movable guide 12 and the anvil plate 13, the twill-shaped convex portions 121 and 131 protruding from the electric wire clamping units 120 and 130 are connected via the joint terminals 21 to the core wire. The core wire 2 in the converging unit 20 is bitten from the left and right.

  Thereby, by causing the upper and lower convex portions 111 and 141 and the left and right convex portions 121 and 131 to bite into the core wire converging portion 20 rather than causing only the upper and lower convex portions 111 and 141 to bite into the core wire converging portion 20. The core wire converging unit 20 can be more securely sandwiched, and the ultrasonic vibration oscillated from the horn 11 can be more reliably propagated to the core wires 2 in the core wire converging unit 20.

  As a result, the crossing angles θ1 and θ2 of the electric wire 1 with respect to the vibration direction V of the horn 11 can be prevented more reliably, and vibration applied to the terminal 4 can be more reliably suppressed, and a plurality of electric wires can be prevented. 1 can be ultrasonically welded to each other more accurately.

A measurement method for measuring the amplitude generated in the terminal 4 connected to one end of the electric wire 1 when ultrasonic welding is performed using the ultrasonic welding apparatus 10 in the first and second embodiments will be described.
FIG. 12 is an explanatory view showing the result of measuring the amplitude of vibration propagating to the terminal 4 by changing the crossing angle of the electric wire 1 with respect to the vibration direction V of the horn 11, and more specifically, FIG. FIG. 12B is a graph showing a measurement result of measuring the amplitude of the terminal 4 in accordance with the crossing angle of the electric wire 1, in which the crossing angle of the electric wire 1 is changed from 0 degree to 90 degrees with respect to the vibration direction V. FIG. 12C is a table showing the measurement results of the terminals 4 recorded in the graph as numerical values.

Specifically, when ultrasonic welding is performed using the ultrasonic welding apparatus 10, the amplitude generated at the terminal 4 connected to one end of the electric wire 1 was measured by a Doppler test method.
That is, as shown in FIG. 12A, the cores 2 exposed at the other ends of the plurality of electric wires 1 are connected to each other in a state where the longitudinal directions L of the electric wires 1 and the terminals 4 are made to coincide with each other. When ultrasonic welding is performed by ultrasonic vibration (frequency = 20 kHz), a laser beam emitted from a Doppler vibrometer (not shown) is applied to the terminal 4 connected to one end of the electric wire 1, and the amplitude generated at the terminal 4 is increased. As a result of the measurement, measurement results as shown in FIGS. 12B and 12C were obtained.

  That is, as a result of measuring the vibration by changing the longitudinal direction L of the electric wire 1 from 0 degrees to 90 degrees with respect to the vibration direction V of the horn 11, the vibration direction V of the horn 11, the electric wire 1 and the terminal 4 are measured. In the case of 0 degree, which coincides with the longitudinal direction L, an amplitude of 44.8 μm was generated at the terminal 4.

However, when the vibration direction V of the horn 11 is used as a reference and the longitudinal direction L of the electric wire 1 is changed to an angle that intersects with the vibration direction V of the horn 11 at 30 degrees, the amplitude generated at the terminal 4 is 33.degree. When it is reduced to 5 μm and further changed to 45 degrees, the amplitude is reduced to 23.7 μm.
Furthermore, a measurement result was obtained in which the amplitude decreased to 15.3 μm when changed to 60 degrees and the amplitude changed to 90 degrees decreased to 13.7 (see FIGS. 12B and 12C).

  As can be seen from the above measurement results, by changing the longitudinal direction L of the electric wire 1 from 0 degrees to 90 degrees with respect to the vibration direction V of the horn 11, the amplitude generated at the terminal 4 is reduced. Can do.

That is, if the crossing angle of the electric wire 1 with respect to the vibration direction V of the horn 11 is set to an angle included in the range of 60 degrees to 90 degrees, the terminals 4 connected to one end of the electric wire 1, such as the contact pieces 43 and 44, etc. It is possible to prevent the contact portion 42 from being deformed (distorted). Further, it is possible to prevent fatigue failure from occurring in a portion where the terminal 4 is easily vibrated such as the connecting portion 45 or a portion having a relatively low strength.
As a result, the core wires 2 in the plurality of electric wires 1 can be connected to each other in a good state in which reliable conductivity is ensured without deforming or fatigue breaking the terminals 4 connected to the electric wires 1.

In the correspondence between the configuration of the present invention and the embodiment,
The connecting device of the present invention corresponds to the ultrasonic welding device 10 of the embodiment,
Similarly,
The portions of the horn 11 and the anvil 14 that sandwich the electric wire 1 correspond to the electric wire placement portion 110 and the electric wire pressing portion 140,
The part which clamps the electric wire 1 in the movable guide 12 and the anvil plate 13 corresponds to the electric wire holding parts 120 and 130,
The wire restricting portion corresponds to the movable guide 12 and the anvil plate 13,
The concavo-convex portions correspond to the convex portions 111, 121, 131, 141,
The present invention is not limited to the configuration of the above-described embodiment, but can be applied based on the technical idea shown in the claims, and many embodiments can be obtained.

  For example, the arrangement of the horn 11 and the anvil 14, and the movable guide 12 and the anvil plate 13 are not limited to the top and bottom and the left and right. It is sufficient that they are opposed to each other, and the top and bottom and the left and right are interchanged, or the entire ultrasonic welding apparatus 10 may be installed with an angle with respect to a horizontal plane.

If the ultrasonic vibration oscillated from the horn 11 is not easily propagated to the terminal 4 connected to the electric wire 1, for example, a state in which the ultrasonic wave is crossed at an intersection angle included in a range of 60 degrees to 90 degrees. Ultrasonic welding may be used.
Moreover, the effect of this invention will be acquired if the terminal is attached to the end of the at least 1 or more electric wire among the some electric wires 1. FIG. At this time, the shape and type of the terminal are not limited.

  Moreover, although Example 1, 2 demonstrated the example which ultrasonically welds the core wires 2 in the some electric wire 1, this invention is not restricted to this, One or several electric wire by which the terminal 4 was connected to one end 2, the strands 2a in the stranded wire formed by twisting a plurality of strands 2a constituting the core wire 2 at the other end may be ultrasonically welded.

  Also in this case, as in Examples 1 and 2, the wires 4a in the electric wire 1 are connected in a good state in which reliable conductivity is ensured without deforming or fatigue breaking the terminal 4 connected to the electric wire 1. There is an effect that can be done.

Moreover, although Example 1 and 2 demonstrated the example which comprised the core wire 2 with the strand wire which twisted two or more aluminum strands 2a, for example, single wires, such as an aluminum strand and an aluminum alloy strand You may comprise. Moreover, you may comprise by the stranded wire or the single wire which twisted strands, such as a copper strand and a copper alloy strand.
Moreover, the structure in which the strand wire or the single wire which twisted together the strand made from aluminum, the strand made from copper, etc. may be mixed.
Further, the effect of the present invention can be obtained if the ultrasonic wave oscillated from the horn 11 does not depend on the wire 2a or the wire diameter of the electric wire 1 and the predetermined crossing angle θ1 is difficult to propagate to the terminal 4 of the electric wire 1. It is done.

Moreover, it is also possible to ultrasonically weld the core wire converging portion 20 formed by bundling the core wires 2 of the plurality of electric wires 1 together without being attached to the joint terminal 21 between the horn 11 and the anvil 14. .
In this case, an uneven impression is formed on the core wire converging part 20 by ultrasonic welding, and adhesion with the water-stopping agent 24 is improved.

  Furthermore, in the present invention, since the horn 11 is vibrated in a direction intersecting the longitudinal direction L of the electric wire 1, the vibration direction V of the horn 11 is a direction intersecting between the core wires 2 in the electric wire 1. Thereby, for example, compared with the case where the horn 11 is vibrated in a direction coinciding with the longitudinal direction L of the electric wire 1, it is possible to connect in a good state without depending on the arrangement of the core wire 2 and to improve the weldability. The effect which can reduce influence is produced.

  Furthermore, in the first and second embodiments, the example in which the electric wire 1 is horizontally arranged to intersect with the vibration direction V of the horn 11 from 60 degrees to 90 degrees from the diagonally left side of the horn 11 has been described (see FIG. 12 (a)), for example, the electric wire 1 may be horizontally disposed so as to intersect with the vibration direction V of the horn 11 obliquely from the right side. Further, the electric wire 1 may be horizontally disposed so as to intersect with the vibration direction V of the horn 11 from the diagonally right side or the diagonally left side. That is, the effect of the present invention can be obtained as long as the angle is within the range indicated by the oblique lines in FIG. 13 with respect to the vibration direction V of the horn 11.

L ... Longitudinal direction D ... Electric wire arrangement direction V ... Vibration direction 1 ... Electric wire 2 ... Core wire 2a ... Elementary wire 3 ... Insulation coating 20 ... Core wire converging part 21 ... Joint terminal 22 ... Welding part 23 ... Insulation cap 24 ... Water stop agent 4 ... Terminal 40 ... Crimp part 42 ... Contact part 45 ... Connection piece 10 ... Ultrasonic welding device 11 ... Horn 110 ... Electric wire arrangement part 111 ... Convex part 12 ... Movable guide 13 ... Anvil plate 120, 121, 130, 131 ... Electric wire Clamping part 14 ... Anvil 140 ... Electric wire pressing part 141 ... Convex part

Claims (10)

At least one end of a wire that is ultrasonically welded with a horn and an anvil sandwiched between strands of the other end of the plurality of wires or strands of the other end of the wires in the wire, with terminals connected to one end A connection method,
The longitudinal direction of the electric wire,
A method for connecting electric wires, characterized in that ultrasonic welding is performed in a state of intersecting at a predetermined crossing angle with respect to a vibration direction of ultrasonic vibration oscillated from the horn. The wire connection according to claim 1, wherein an intersecting angle between a longitudinal direction of the wire and a vibration direction of the ultrasonic vibration is set to an angle included in a range of 60 degrees to 90 degrees with respect to the vibration direction. Method. The joint terminal that covers the core wire converging portion is mounted on the core wire converging portion in which the core wires in the plurality of electric wires or the strand wires of the stranded wires constituting the core wire in the electric wires are bundled together. The connection method of the electric wire of 1 or 2. The connection method of the electric wire as described in any one of Claims 1-3 which provided the uneven | corrugated | grooved part which cross | intersects with respect to the longitudinal direction of the said electric wire in the part which clamps the said electric wire of at least one among the said horn and the said anvil. . Wire connecting device for ultrasonic welding by holding a terminal connected to at least one end of a plurality of electric wires or strands of stranded wires constituting a core wire of an electric wire between a horn and an anvil arranged vertically Because
In the state where the core wires in the electric wire are sandwiched between the horn and the anvil,
An electric wire arrangement direction for arranging the electric wires so that the longitudinal direction of the electric wires is a desired direction,
An electric wire connecting device including an electric wire restricting portion that restricts an angle intersecting a predetermined intersecting angle with respect to a vibration direction of ultrasonic vibration oscillated from the horn. The electric wire regulating part,
Opposite one side of the electric wire placed on the horn, a movable guide arranged on one side of the horn,
Opposed to the other side of the electric wire placed on the horn, and composed of an anvil plate arranged on the other side of the horn,
The movable guide and the anvil plate;
The electric wire connecting device according to claim 5, wherein the electric wire connecting device is provided so as to be relatively movable in a direction in which the electric wire placed on the horn is sandwiched. The electric wire regulating part,
In a state where the core wires in the plurality of electric wires or between strands of stranded wires constituting the core wires in the electric wires are sandwiched,
The crossing angle between the wire arrangement direction of the wire and the vibration direction of the ultrasonic vibration is configured by a surface that is regulated to an angle included in a range of 60 degrees to 90 degrees with respect to the vibration direction. 6. The electric wire connecting device according to 6. Connection of the electric wire as described in any one of Claims 5-7 which provided the uneven | corrugated | grooved part which cross | intersects with respect to the electric wire arrangement | positioning direction of the said electric wire in the part which clamps the said electric wire of at least one among the said horn and the said anvil. apparatus. The uneven | corrugated | grooved part which cross | intersects with respect to the electric wire arrangement | positioning direction of the said electric wire in the part which clamps the said electric wire of at least one among the said movable guide and the said anvil plate is provided as described in any one of Claims 5-8. Electric wire connection device. At least one end is connected to a terminal, and is a terminal-attached electric wire ultrasonically welded between strands of strands constituting core wires at the other end of the plurality of electric wires or at the other end of the electric wires,
In the place where ultrasonic welding is performed on the wire,
An electric wire with a terminal, wherein concave and convex indentations are formed in a direction crossing a longitudinal direction of the electric wire.

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