JP7350584B2 - Wire joining equipment - Google Patents

Description

The present invention relates to an electric wire joining device.

Conventionally, there is an ultrasonic bonding device that uses ultrasonic vibration to bond electric wires together. For example, if an anvil, a receiver, and a tip are provided, and the core wires of multiple electric wires are accommodated in the groove provided in the anvil and the tip is advanced, ultrasonic vibration is applied to the core wires of the multiple electric wires from the tip. An electric wire joining device for joining wires together has been proposed (for example, see Patent Document 1).

In addition, after the wiring direction of the electric wire intersects the vibration direction of the horn at a certain angle and the electric wire is held between a movable guide and an anvil plate, the electric wire is held between the horn and anvil, and the core wires of the electric wire are subjected to ultrasonic waves. An ultrasonic welding device for welding has been proposed (see, for example, Patent Document 2).

Japanese Patent Application Publication No. 2010-73475 Unexamined Japanese Patent Publication No. 2016-185009

By the way, when joining electric wires, a large number of combinations of electric wires can be made depending on the type of electric wire, the diameter of the electric wire, the number of electric wires, etc. In an ultrasonic bonding device that uses ultrasonic vibrations, for example, the vibrations occur along the direction in which a plurality of electric wires are arranged, so depending on the number of electric wires, a jig is required to restrict the electric wires from spreading laterally. Ultrasonic bonding equipment specialized for bonding electric wires can also handle a large number of combinations of electric wires. On the other hand, when wire bonding is performed using a general ultrasonic bonding device, a plurality of corresponding jigs must be prepared, and major changes in equipment are required, so there is room for improvement.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric wire joining device that can perform stable electric wire joining without significantly changing equipment.

In order to achieve the above object, an electric wire joining device according to the present invention accommodates at least a vibrating body that generates ultrasonic vibration in a linear motion, and an electric wire group consisting of two or more electric wires, and which a first accommodation space extending in orthogonal directions, and a first accommodation space extending in the arrangement direction that is the same direction as the vibration direction in the linear motion, overlapping with the first accommodation space in plan view, and supporting the vibrating body. a second accommodation space for accommodating the vibrating body, which is arranged to face the vibrating body in a direction perpendicular to the vibrating body and a direction perpendicular to the arrangement direction, and forms the first accommodation space and the second accommodation space; a pedestal, a pair of fixing parts formed opposite to each other in the orthogonal direction on the pedestal with the second accommodation space in between; a pair of movable parts that face each other in the arrangement direction and are formed to be movable relative to the pedestal in the arrangement direction, and each of the fixed parts and each of the movable parts move in the orthogonal direction and in the orthogonal direction in plan view . The vibrating body is arranged to be spaced apart from each other in the arrangement direction, and when the vibrating body is accommodated in the second housing space and in contact with the wire group, the vibrating body generates vibration that causes the wire group to transition from a non-bonded state to a bonded state. It is characterized by the occurrence of

The electric wire joining apparatus according to the present invention has the effect of being able to perform stable electric wire joining without significantly changing equipment.

FIG. 1 is a schematic diagram showing a schematic configuration of a wire joining device in an embodiment. FIG. 2 is a schematic diagram showing a schematic configuration of the wire joining device in the embodiment. FIG. 3 is a schematic diagram showing a schematic configuration of the wire joining device in the embodiment. FIG. 4 is a schematic diagram showing an example of a joint part of a group of electric wires joined by the electric wire joining apparatus.

EMBODIMENT OF THE INVENTION Below, embodiment of the electric wire joining apparatus based on this invention is described in detail with reference to drawings. Note that the present invention is not limited to the embodiments described below. Furthermore, the constituent elements in the embodiments described below include those that can be easily replaced by those skilled in the art, or those that are substantially the same.

[Embodiment]
1 to 3 are schematic diagrams showing a schematic configuration of an electric wire joining device in an embodiment. FIG. 4 is a schematic diagram showing an example of a joint part of a group of electric wires joined by the electric wire joining apparatus. Note that FIG. 1 shows the state of the wire joining device before a group of wires is introduced. FIG. 2 shows the state of the wire joining device when a group of wires is introduced. FIG. 3 shows the state of the wire joining device when joining a group of wires.

Note that the illustrated X direction is the width direction of the wire joining device in this embodiment, and is also the direction in which the wires are arranged. The Y direction is the depth direction of the wire joining device in this embodiment, and is an orthogonal direction orthogonal to the arrangement direction. Note that the Y direction is a direction perpendicular to the X direction. The Z direction is the vertical direction of the wire joining device in this embodiment, and is a direction perpendicular to the arrangement direction and the orthogonal direction. Note that the Z direction is a direction perpendicular to the X direction and the Y direction. Furthermore, among the Z directions, the Z1 direction is defined as an upward direction, and the Z2 direction is defined as a downward direction.

The wire joining device 1 in this embodiment generates ultrasonic vibrations to ultrasonically join the wires W in the wire group Ws. The wire group Ws is composed of a plurality of wires W. The electric wire W includes, for example, a linear conductor portion W1 having electrical conductivity and an insulating covering portion W2 that covers the outside of the conductor portion W1. The conductor portion W1 is a core wire made by bundling a plurality of conductive metal wires, such as copper, copper alloy, aluminum, and aluminum alloy. The conductor portion W1 may be a twisted core wire made by twisting a plurality of wires together. The covering portion W2 is a wire covering that covers the outer peripheral side of the conductor portion W1. The covering portion W2 is formed, for example, by extrusion molding an insulating resin material (PP, PVC, crosslinked PE, etc., which is appropriately selected in consideration of wear resistance, chemical resistance, heat resistance, etc.). be done. In the electric wire W, the covering portion W2 is stripped off at least at one end of the conductor portion W1, and one end of the conductor portion W1 is exposed from the covering portion W2. The terminals of the conductor portion W1 exposed from the covering portion W2 are joined at a joint portion V, for example, as shown in FIG. The wire joining device 1 of this embodiment includes a horn 10, a first accommodation space 21, a second accommodation space 23, and an anvil 20.

The horn 10 is an example of a vibrating body, and has a function of generating at least linear ultrasonic vibration. The horn 10 of this embodiment generates ultrasonic vibrations such as linear vibrations and compound vibrations, for example. Horn 10 is connected to ultrasonic oscillator 11. The ultrasonic oscillator 11 applies an electric signal to an ultrasonic vibrator (not shown), and excites the horn 10 by ultrasonic vibration of the ultrasonic vibrator. The horn 10 has a function of directly or indirectly applying ultrasonic vibrations generated by an ultrasonic vibrator to the parts to be joined. The horn 10 can directly apply ultrasonic vibration to the parts to be joined in the wire group Ws, that is, the plurality of conductor parts W1. Further, the horn 10 can apply ultrasonic vibration to the plurality of conductor parts W1 via a welding tool (chip) (not shown). The horn 10 of this embodiment is formed in a rectangular shape and is configured to be movable in the vertical direction. That is, the horn 10 can be raised and lowered by a lifting device (not shown). For example, when the horn 10 is in an upward direction, it is in a standby state, and when it is in a downward direction, it is in a joining state. The horn 10 is accommodated in the second accommodation space 23 when descending. The horn 10 is housed in the second housing space 23 and generates vibrations that cause the wire group Ws to transition from a non-bonded state to a bonded state while in contact with the wire group Ws.

The first housing space 21 is a portion that accommodates a wire group Ws consisting of two or more wires W and extends in an orthogonal direction perpendicular to the arrangement direction of the wires W. For example, the arrangement direction of the electric wires W is the vertical direction in the electric wire joining device 1. Therefore, the orthogonal direction is the depth direction in the wire joining device 1. The first accommodation space 21 becomes wider or narrower in the width direction as a pair of movable parts 27 provided on the anvil 20 move in the width direction.

The second housing space 23 is a portion that extends in the arrangement direction that is the same direction as the vibration direction in linear motion, overlaps the first housing space 21 in plan view, and houses the horn 10 . In this embodiment, the vibration direction in the linear motion (hereinafter also simply referred to as "vibration direction") is the same direction as the arrangement direction of the plurality of electric wires W accommodated in the first accommodation space 21, and the electric wire joining device This is the same direction as the width direction in No. 1. Therefore, the second accommodation space 23 is formed to extend in the width direction. The second accommodation space 23 is perpendicular to the first accommodation space 21 on the main body 29 of the anvil 20 . That is, the first accommodation space 21 and the second accommodation space 23 are formed in a cross shape when viewed from above. Since the second housing space 23 accommodates the horn 10 having a constant length in the depth direction, the length in the depth direction is constant.

The anvil 20 is an example of a pedestal, and functions as a cradle for the electric wires W to be joined. The anvil 20 is arranged to face the horn 10 in a direction perpendicular to the arrangement direction and a direction perpendicular to the arrangement direction, and forms a first accommodation space 21 and a second accommodation space 23. Here, the orthogonal direction is a direction orthogonal to the arrangement direction of the plurality of electric wires W set on the anvil 20, and is a depth direction in the electric wire joining device 1. Therefore, the anvil 20 is arranged to face the horn 10 in a direction perpendicular to the depth direction and the width direction, that is, in the vertical direction. Since the anvil 20 forms the first accommodation space 21 and the second accommodation space 23, as shown in FIGS. 1 to 3, the anvil 20 is spaced apart in the width direction and the depth direction, respectively, as shown in FIGS. 1 to 3. It has four rectangular protrusions formed therein. The anvil 20 includes a pair of fixed parts 25, a pair of movable parts 27, and a main body part 29.

The pair of fixing parts 25 are parts formed in the anvil 20 to face each other in the orthogonal direction with the second accommodation space 23 interposed therebetween. Each fixing part 25 is fixed to the main body part 26. Each fixing part 25 is formed in a rectangular parallelepiped shape or a cubic shape.

The pair of movable parts 27 are parts that respectively face the pair of fixed parts 25 in the arrangement direction with the first accommodation space 21 in between, and are formed to be movable relative to the anvil 20 in the arrangement direction. . Each movable part 27 can individually move relative to the anvil 20 in the arrangement direction, and can stop at any position in the arrangement direction. Each movable part 27 moves and stops in accordance with the joining width L (see FIG. 4) determined by the joining conditions of the wire group Ws. The movement and stopping of each movable part 27 is controlled by a drive control part (not shown). The joining conditions for the wire group Ws are set based on the wire type, wire diameter, number, etc. of the plurality of wires W to be joined. Note that each movable part 27 may be moved and stopped manually, for example.

The main body portion 29 is a portion that fixedly supports the pair of fixed portions 25 and movably supports the pair of movable portions 27. The main body portion 29 is installed in the main body (not shown) of the wire joining device 1.

Next, the wire joining operation in the wire joining apparatus 1 will be explained with reference to FIGS. 1 to 3. In this embodiment, a case will be described in which a wire group Ws made up of two wires W is joined.

First, the operator moves the pair of movable parts 27 in one direction in the width direction to separate them from the pair of fixed parts 25 in order to store the wire group Ws in the first housing space 21 . Next, the operator puts the wire group Ws into the wire joining device 1. At this time, the wire group Ws is accommodated in the first accommodation space 21 of the anvil 20 with the ends of the conductor portions W1 exposed from the covering portion W2 of each wire W being aligned. For example, the conductor portion W1 with the exposed covering portion W2 is arranged at a portion where the first accommodation space 21 and the second accommodation space 23 intersect. Point O shown in FIGS. 1 and 2 is the center of the intersection of the first accommodation space 21 and the second accommodation space 23. The conductor portion W1 with the exposed covering portion W2 is placed, for example, at a point O (FIG. 2).

Next, each movable part 27 moves in the width direction according to the joining width L and stops at a predetermined position according to the operation by the operator. When the movement of the movable part 27 is completed, the horn 10 starts descending from the standby position and is accommodated in the second accommodation space 23 (FIG. 3). The horn 10 is housed in the second housing space 23 and descends to a predetermined position that meets the bonding conditions for the wire group Ws while contacting the conductor portion W1 of the wire W to be bonded. Next, when the horn 10 is lowered to a predetermined position, the ultrasonic oscillator 11 starts driving, and the horn 10 starts ultrasonic vibration in response to the driving of the ultrasonic oscillator. The horn 10 generates ultrasonic vibrations such as linear vibrations and compound vibrations, and joins the conductor portions W1 of the two electric wires W. Conventionally, since vibration has been applied to almost the entire axial direction of the conductor part W1 exposed from the covering part W2 (joint part Va in FIG. 4), a horn that matches the length of the exposed conductor part W1 in the axial direction has been applied. The exposed length of the conductor portion W1 is determined according to the size of the horn. With the above configuration, it is possible to apply ultrasonic vibration to a part of the conductor portion W1 exposed from the covering portion W2 in the axial direction, and there is no need to prepare a horn that matches the exposed length, allowing the use of a common horn. It becomes possible to aim for.

As described above, the wire joining device 1 according to the present embodiment accommodates the horn 10 that generates at least linear ultrasonic vibration and the wire group Ws, and extends in the orthogonal direction perpendicular to the arrangement direction of the wires W. a first accommodation space 21 that extends in the arrangement direction that is the same direction as the vibration direction in linear motion, overlaps the first accommodation space 21 in plan view, and accommodates the horn 10; , an anvil 20 that is arranged to face the horn 10 in a direction orthogonal to the arrangement direction and that forms a first accommodation space 21 and a second accommodation space 23. The horn 10 is housed in the second housing space 23 and generates vibrations that cause the wire group Ws to transition from a non-bonded state to a bonded state while in contact with the wire group Ws.

With the above configuration, for example, when wires are joined using a general ultrasonic welding device, wires can be easily joined without having to prepare multiple jigs for various combinations of wires W. becomes. As a result, wire bonding can be stably performed without significantly changing the equipment of the ultrasonic bonding apparatus.

Further, the wire joining device 1 of the above embodiment has a pair of fixing portions 25 formed opposite to each other in the orthogonal direction with the second accommodation space 23 in between, and a second It has a pair of movable parts 27 which are opposed to each other in the arrangement direction with one accommodation space 21 in between and are formed to be movable relative to the anvil 20 in the arrangement direction. Each fixed part 25 and each movable part 27 are spaced apart from each other in the orthogonal direction and the array direction in plan view.

With the above configuration, one jig (anvil 20) can handle combinations of a large number of electric wires W. In other words, since the joining width L can be set according to various combinations using the movable part 27, there is no need to prepare a jig for each combination of electric wires W, reducing equipment costs and burden on joining work. can be reduced.

In the above embodiment, the horn 10 has a rectangular surface on which the plurality of electric wires W are joined, but the horn 10 is not limited to this, and may be circular. In this case, for example, the intersection of the first accommodation space 21 and the second accommodation space 23 may be aligned with a circular horn.

Further, in the above embodiment, the horn 10 has a function of generating ultrasonic vibrations such as linear vibrations and compound vibrations, but is not limited to this, and generates ultrasonic vibrations that move linearly in the arrangement direction. It may be something. Further, in the above embodiment, the arrangement direction of the electric wires W is the same direction as the vibration direction in linear motion, but is not limited to this, and the arrangement direction is the same direction as the orthogonal direction and the direction orthogonal to the vibration direction (for example, the Z direction). There may be.

1 Wire joining device 10 Horn 11 Ultrasonic oscillator 20 Anvil 21 First housing space 23 Second housing space 25 Fixed part 27 Movable part 29 Main body W Electric wire W1 Conductor part W2 Sheathing part Ws Wire group

Claims (1)

a vibrating body that generates at least linear ultrasonic vibration;
a first accommodation space that accommodates a wire group consisting of two or more wires and extends in an orthogonal direction perpendicular to the arrangement direction of the wires;
a second housing space that extends in the arrangement direction that is the same direction as the vibration direction in the linear motion, overlaps the first housing space in plan view, and houses the vibrating body;
a pedestal arranged to face the vibrating body in the direction perpendicular to the vibrating body and the direction perpendicular to the arrangement direction, and forming the first accommodation space and the second accommodation space;
a pair of fixing parts formed on the pedestal to face each other in the orthogonal direction with the second accommodation space in between;
a pair of movable parts that respectively face the pair of fixed parts in the arrangement direction with the first accommodation space in between, and are formed to be movable relative to the pedestal in the arrangement direction;
Equipped with
Each of the fixed parts and each of the movable parts are
spaced apart from each other in the orthogonal direction and the arrangement direction in a plan view,
The vibrating body is
An electric wire joining device, wherein the electric wire joining device generates a vibration that causes the electric wire group to transition from a non-joined state to a connected state when the electric wire group is housed in the second housing space and is in contact with the electric wire group.