JP2002198242A - Device for jointing wire material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for jointing a wire material that can uniformly and surely joint an insulation coated conductor as a wire material wire an electrode. SOLUTION: This device is comprised of a chuck 17 that consists of a fixing claw 3 and an open/close claw 4 for grasping the end side face of a coil 2 (work) and has a freely variable holding force, a slider 11 for loading the coil 2 and holding its bottom, a pair of back-up pins 13 that are freely movable and independently press both electrodes of the coil 2, and a heater chip 14 that is freely movable and heats and press-fits both the electrodes of the coil 2 and an insulation coated conductor 1 (wire material), which faces the back-up pin 13; and thus the device can surely joint the wire material with both the electrodes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire joining apparatus for joining a wire (insulated conductor) in an electronic component to an electrode.

[0002]

2. Description of the Related Art Wire joining in conventional coil parts is performed by:
One side of the electrode was held on the bottom surface by a fixed chuck, and the electrode on the other side was held by backup from below for joining.

[0003] A conventional wire rod joining apparatus for a coil component, which is an electronic component, will be described with reference to the drawings. FIG. 6 is a perspective view of a conventional wire joining apparatus for coil components.

[0006] As shown in FIG. 6, a side surface of a coil 2 formed by winding an insulating film conductor 1 as a wire is fixed to an electrode 26 by a chuck 28 comprising an opening / closing claw 21 rotatable by a fixed claw 23 and a shaft 22. 27, and the bottom surface of the coil 2 is held by the tip of the fixed claw 23.

[0005] In the winding step which is a step before the joining step, when the coil 2 is formed by winding the insulating film conductor 1,
If a fixed holding body is present on the entire bottom surface of the coil 2, interference with the insulating-coated conductor wire 1 occurs and winding or mounting cannot be performed.

Accordingly, the bottom surface of the coil 2 is held only by the bottom surface of the electrode 27 on one side. At the time of bonding, the heater chip 24 descends from above, and the bottom surface of the electrode 2 is not held by the fixing claw 23 from below. The backup 25 which can be moved up and down with respect to 26 rises, and heats and crimps the electrodes 26, 27 and the insulating film conductor 1.

[0007]

However, in the conventional wire bonding apparatus, different pressures are applied to the two electrodes. That is, the pressing force applied to the electrode 26 held by the backup 25 must be set lower than the pressing force applied to the electrode 27 held by the opening / closing claw 21 and the fixed claw 23. It is difficult to keep the electrodes 26 and 27 of the same bonding quality.

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a wire joining apparatus capable of reliably joining an insulating-coated conductor and an electrode with high quality.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a wire joining apparatus according to the present invention mounts a work with a variable holding force comprising a fixed claw and a variable claw for gripping an end side surface of a work, and a work. And a slider that holds the bottom
It consists of a pair of backup pins that are movable and independently presses both electrodes of the work, and a movable heater chip that faces the backup pin and heat-presses the two electrodes of the work and wire material. Wires can be joined uniformly and reliably.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An invention according to claim 1 of the present invention is a chuck having a variable holding force, comprising a fixed claw and a variable claw for gripping an end side surface of a work, and a work mounted on the bottom surface thereof. Wire joining device comprising a slider that moves, a pair of backup pins that are movable and independently presses both electrodes of the work, and a movable heater tip that faces the backup pin and heat-presses the two electrodes of the work and the wire. This has the effect of securely joining the two electrodes of the work and the wire, and increasing the gripping force other than during the joining to stabilize the work holding.

According to a second aspect of the present invention, there is provided the wire bonding apparatus according to the first aspect, wherein the slider has a concave notch at a tip end thereof through which a backup pin is inserted.
This has the effect of improving the maintenance of the posture of the work during the joining operation.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a wire rod joining apparatus for a coil component according to an embodiment of the present invention, FIG.
3 is a side view of the same, FIG. 4 is a side view of the joint portion, and FIG. 5 is a perspective view of the coil component.

In FIG. 5, as described in the above-mentioned prior art, reference numeral 1 denotes an insulated conductor, which is a wire, and 2 denotes a coil which is a work formed by winding the insulated conductor 1. An electrode 15 and an electrode 16 for attachment and connection made of a conductive material are formed at the ends, and are joined to the insulating-coated conductor 1.

In FIG. 1 to FIG. 4, reference numeral 3 denotes a fixed claw, and 11 denotes a movable slider on which the coil 2 is mounted and held on the bottom surface thereof.

Reference numeral 4 denotes an inverted L-shaped opening / closing claw corresponding to the fixed claw 3, and constitutes a chuck 17 for holding the end side surface of the coil 2 at its tip and the tip of the fixed claw 3.

The opening / closing claw 4 is rotatable about the fulcrum pin 5, is rotated and opened by the restoring force of the compression spring 9, and is opposed to the restoring force of the compression spring 9 by the driving force of the cylinder 8. It turns and closes.

Reference numeral 6 denotes a plate on which the fixed claw 3, the cylinder 8, and the slider 11 are installed and held. The end side surface of the coil 2 is gripped by the chuck 17 with the fixed claw 3 and the opening / closing claw 4, the bottom surface of the coil 2 is held on the top surface of the tip of the slider 11, and the slider 11 is connected to the pin 10 attached to the other end. The moving operation is performed by driving (the driving mechanism is not shown).

The distal end of the slider 11 is normally pressed by the restoring force of the compression spring 12, moves linearly, and holds the coil 2 to maintain the set posture.

A contact pin 7 is connected to the cylinder 8 and is reciprocally movable. When the cylinder 8 is driven, the tip of the contact pin 7 slidably abuts on the end of the opening / closing claw 4 and the fulcrum pin 5
The opening / closing claw 4 is rotated about the axis.

Reference numeral 14 denotes an insulating film conducting wire 1 as a wire and an electrode 1
Movable heater chip for thermocompression bonding of 5, 16; 13
A pair of backup pins movable at the electrode pitch of the coil 2 is opposed to the heater chip 14 and is pressed from the bottom surface of the coil 2 to perform backup.

Next, the operation of the wire joining apparatus configured as described above will be described. First, after the slider 11, which is mounted while holding the bottom surface of the coil 2, which is the workpiece gripped by the chuck 17, moves back and forth, the heater chip 14 moves down and moves down to the position immediately above the top surface of the coil 2. Stop at.

A little later than the timing at which the heater chip 14 stops, the backup pin 13 moves up to the bottom of the coil 2 and stops.

By stopping the backup pin 13, the coil 2 is not directly impacted. After that, the movement of the backup pin 13 further raises the coil 2 and pushes the coil 2 against the heater chip 14. Such a restriction is performed, and an appropriate joining operation is performed.

Next, the backup pin 13 moves again and rises again, and the insulation coating conductor 1 and the electrode portions 15 and 16 are heated and pressed by the heater chip 14, whereby the insulation coating of the insulation coating conductor 1 is melted and evaporated to be removed. Joining with 15 and 16 is performed.

After the joining is completed, the heater chip 14 also moves and rises following the movement and fall of the backup pin 13, and the tip of the slider 11 returns to the original bottom position of the coil 2 to mount and hold the coil 2. Maintain posture.

Incidentally, the backup pin 13 moves and rises, and the electrodes 15 and 16 of the coil 2 are connected to the heater chip 14.
When the pressing force is applied to the electrode 15, the stronger the closing force of the open / close claw 4, the more the frictional force acts between the electrode 15 and the gripped electrode 15. Power weakens.

On the other hand, the coil 2 is held by the open / close pawl 4
The stronger the holding force, ie, the closing force, the more stable. Therefore, in order to vary the opening / closing force in gripping the coil 2, the closing force of the opening / closing claw 4 is generated by the thrust (driving force) of the cylinder 8. In other words, the thrust is reduced when the insulating coating conductor 1 and the electrodes 15 and 16 are joined, and the thrust is increased at other times to perform optimal gripping and joining operations.

The slider 11 may be provided with a notch cut at the tip thereof, and the cut of the recess may be inserted through the tip of the backup pin 13, so that the amount of movement of the slider 11 can be reduced and the coil 2 can be moved. Posture maintenance is further improved during the joining operation.

[0029]

As described above, the wire joining apparatus according to the present invention properly and surely grips the work (coil) when joining the insulating film conductor, which is a wire, to the electrode, and uniformly and insulates the insulating film conductor and the electrode. This has the effect of being able to reliably join.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wire rod joining apparatus for coil components according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a side view of the joint.

FIG. 5 is a perspective view of the coil component.

FIG. 6 is a perspective view of a conventional wire joining apparatus for coil components.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulating-film conductor (wire material) 2 Coil (work) 3 Fixing claw 4 Opening / closing claw 5 Support pin 6 Plate 7 Applicable pin 8 Cylinder 9 Compression spring 10 Pin 11 Slider 12 Compression spring 13 Backup pin 14 Heater tip 15, 16 Electrode 17 Chuck

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akihiro Akiyama 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Term (reference) 5E062 FG03 FG05

Claims (2)

[Claims] 1. A chuck having a variable holding force, comprising a fixed claw and a variable claw for gripping an end side surface of a work, a slider for mounting the work and holding the bottom surface thereof, and a movable and independent electrode for the work. A wire joining device comprising: a pair of backup pins that are pressed by pressing; 2. The wire rod joining apparatus according to claim 1, wherein a slider provided with a concave cutout at a tip end portion through which a backup pin is inserted is used.