JPH0134399Y2 - - Google Patents

Description

[Detailed description of the invention] A. Field of industrial application This invention examines the quality of solder plating of shaft-shaped parts with magnetic leads, such as electronic parts such as diodes, extracts defective parts, and stores them in a magnetic box. This relates to a device for

B. Prior Art For example, electronic components having magnetic leads such as DHD type diodes have solder plating on the leads, and defective products are removed by screening the plating condition using a predetermined method. Examples of such defects include so-called abecks, in which a plurality of diodes are connected by solder while their leads are in contact with each other, and lead bends, in which lead portions are bent.

Figure 1 shows an example of a diode transfer device, in which 1 is a diode with a magnetic lead, 2 is
3 is a magnet box that temporarily holds a plurality of diodes 1 in a parallel state by installing a pair of flat magnets 2a and 2b opposite each other; 3 is one end of the magnet box 2; It is a rotating drum that rotates with a portion of the drum encased in the drum, and as shown in FIG.
Magnets 6, 6 that attract 5 are embedded. Reference numeral 7 denotes a chain conveyor that transfers the diodes 1 sent at a constant pitch by the drum 3 and transfers them to the next process at a constant pitch. The diodes 1 that have been soldered are transferred to the next process at a certain pitch by the device shown in FIG. Transfer to process. By the way, as a method for determining the quality of the diode 1 on the drum 3, a sensor (not shown) is installed at a predetermined position near the drum 3 to detect the presence or absence of a lead.
A lever placed between the sensor and the chain conveyor 7 can be detected by detecting defective products such as irregularities or bent wires based on the timing of the detection output of the sensor, or by visually detecting defective products by an operator. (not shown), the defective products are removed and transferred to a magnetic box where only the defective products are stored.
Further, as a means for taking out defective products, there is a method in which an electromagnet is arranged on the drum 3, and the defective diodes are attracted by the electromagnet and transferred to a takeout magnet box.

However, with this device, when the transfer speed is increased,
Not only did the diode 1 that was removed by the lever bounce and not fit properly into the magnetic box for storing defective products, it also jumped onto the good diode 1 and was sent to the next process.

In addition, if an electromagnet is used to remove a defective diode, it is necessary to stop energizing the electromagnet and completely turn off the magnetism of the electromagnet when transferring it from the electromagnet to the magnet box, which is not suitable for high-speed operation. It was hot.

C. Purpose of the invention The object of the present invention is to provide a device that can quickly and accurately take out a shaft-like component having a magnetic lead and that can be smoothly accommodated in a magnetic box.

D. Structure of the invention: A magnetic box in which a pair of flat magnets are arranged facing each other to hold a shaft-like part having a magnetic lead between the magnets; The electromagnet is characterized in that it includes an electromagnet that detaches the shaft-shaped component and houses it in the magnet box when the strength of the magnetic field reaches a minimum while being energized at half-wave.

E. Example An example of the present invention is shown in FIG. In this figure, the same reference numerals as in FIG. 1 indicate the same parts and the explanation will be omitted.

What is different from the device shown in FIG. 1 is that a magnetic box 8 for storing the defective diode 1' is arranged near the rotating drum 3, which is a transporting body, and moves up and down above the rotating drum 3. The only difference is that an electromagnet 9 that moves between the magnetic boxes 8 is arranged. Although not shown, a sensor for detecting a defective diode 1' is arranged near the rotating drum 3, and the electromagnet 9 is operated based on the output of the sensor.

This electromagnet 9 is constantly magnetized by a half-wave current of a predetermined frequency.

In this operation, when the sensor detects a defective diode 1' on the drum 3, the electromagnet 9 descends, attracts and holds the defective diode 1', rises and moves in the direction of the magnetic box 8, and attracts the diode 1'. It then enters the magnetic box 8, then comes out of the magnetic box 8, and is positioned on the rotating drum 3 to wait.

Here, the electromagnet 9 enters the magnetic box 8 while attracting the diode 1', and immediately comes out of the magnetic box 8, leaving the defective diode 1' in the magnetic box.

This is because half-wave current is supplied to the electromagnet 9, so the strength of the magnetic field is constantly changing, but even when the current is zero, the drum remains magnetically attracted due to the residual magnetism of the electromagnet 9 and lead 5. 3 to the magnetic box 8. Inside the magnetic box 8, the leads 5, 5 are attracted by the magnet, but since the electromagnet 9 is also moving during this time, the leads 5, 5 are stopped at the moment when the strength of the magnetic field of the electromagnet 9 reaches its minimum. It leaves the electromagnet 9 and stays inside the magnet box 8. When the magnetic field of the electromagnet 9 becomes stronger, the distance between the diode 1' and the diode 1' increases, and the electromagnet 9 no longer attracts the diode 1'.

Therefore, even if the electromagnet 9 is continuously operated in a continuously energized state, separation is successful.

If an alternating current voltage is applied to the electromagnet 9, the time when the magnetic field strength is at its minimum becomes shorter, and separation may not be performed well, and it may not be possible to follow the moving speed.

The period and current value of the half-wave current supplied to the electromagnet may be adjusted as appropriate depending on the moving speed and the magnetic field strength of the magnet box 8.

F. Effects of the invention The present invention applies a half-wave current to the electromagnet that takes out the shaft-like parts and moves them to the magnet box, thereby separating the shaft-like parts at high speed and storing them in the magnet box while continuously operating the electromagnet. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a transfer device, FIG. 2 is a front sectional view of a rotating drum, and FIG. 3 is a perspective view showing an example of a take-out device according to the present invention. 1...Shaft-shaped part, 8...Magnetic box,
9...Electromagnet.

Claims (1)

[Scope of Claim for Utility Model Registration] A magnetic box that holds a shaft-like part with a pair of flat magnets arranged opposite each other and having a magnetic lead between the magnets, and a shaft-like part that is magnetized by a half-wave current and is attracted and taken out. and an electromagnet that detaches the shaft-like part and accommodates it in the magnet box when the strength of the magnetic field reaches a minimum while being energized at half-wave in the magnet box. Parts extraction device.