JPH06342995A - Method for mounting electronic component - Google Patents

Abstract

PURPOSE:To enable automatic correction of the direction of an electronic component to mount it normally on a printed board even when an aligner feeds electronic components as right-left directions kept reversed by a method wherein a detector detects legs of an electronic component. CONSTITUTION:A plurality of electronic components 10 having right-left unsymmetric legs 12 with respect to an alignment direction are aligned by an aligner 3. In the case where electronic components 10b run by alignment in the right-left reverse direction, a detector 7 does not detect a leg 12 on one of right-left sides of an electronic component 10b as shown by arrow D and issues failure signals. Then, setting a suction direction memories by a controller is made, resulting in the correction of a 180 deg. directional error by failure signals. That is, a transfer head 2 makes a suction action as it is and is reversed by 180 deg. in the right-left direction B with respect to the alignment direction A by a timing belt 9 via a motor 8 in the mounting step. This enables electronic components 10b to be mounted normally on a printed board 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component mounting method for mounting an electronic component used as an automation device for various industrial equipment on a printed circuit board.

[0002]

2. Description of the Related Art In recent years, minute electronic parts have been enclosed in tapes, sticks, magazines, etc., or they have been mounted or thrown into each aligning device in a bare state, and electronic parts in the aligning device have been automatically mounted. It is widely used that the transfer head of the device sucks and automatically mounts it on the printed circuit board. Conventionally, a bare electronic component is placed in an electronic component aligning device, a transfer head moving in the XY directions stands by at the upper part of the suction position, and a printed circuit board stands by in front of it. . The electronic components are aligned by the alignment device, then the nozzle of the transfer head descends, the electronic components are attracted by vacuum pressure, and the mounting angle is set at the same time when the electronic components are mounted on the printed board. It was being worn.

[0003]

However, in the above-mentioned conventional type, the electronic parts may be aligned in the right and left opposite directions on the aligning device, and conventionally there is no means for detecting the direction of the electronic parts, and the transfer head is used. Absorbs electronic components as they are,
Since the angle is set and mounted on the printed circuit board,
There was a problem of producing defective substrates.

The present invention solves the above problems, and an object of the present invention is to provide an electronic component mounting method capable of preventing the production of a defective substrate in which electronic components are mounted on the substrate in the left-right opposite directions. And

[0005]

In order to solve the above problems, the present invention is a method for mounting an electronic component having a left-right asymmetrical foot on a substrate, wherein the electronic component is mounted on an aligning device. While aligning and transporting toward the substrate, the detection device detects the foot at a position downstream of the aligning device to determine the left-right direction of the electronic component, and then the transfer head sucks the electronic component. Then, while being transferred to the substrate, the electronic component is horizontally flipped based on the determination result of the detection device to correct the left-right direction, and then the electronic component is mounted on the substrate.

[0006]

According to the above construction, the detection device detects the leg of the electronic component, thereby discriminating the electronic components whose right and left are arranged in opposite directions, and in response to the signal from the detection device, the suction device adsorbs them. The mounting direction of the electronic components thus mounted is reversed left and right with respect to the alignment direction. As a result, the left and right directions of the electronic component are correctly corrected, and the electronic component is mounted on the printed circuit board in the normal mounting direction.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, a suction device for positioning the electronic component 10 is provided in the central upper portion of the electronic component mounting device 1 with a nozzle that moves in XY and suctions the electronic component 10. A moving head 2 is provided. An aligning device 3 for each electronic component is mounted behind it, and a conveyor 4 for conveying the printed circuit board 11 is provided in front of it.

In FIG. 1, an optical detection device 7 such as a photoelectric switch is provided at the suction position of the electronic component alignment device 3, and the electronic components 10 are aligned in the alignment direction A (arrow). The transfer head 2 is rotated in the left-right direction B (arrow) with respect to the alignment direction A by the motor 8 via the timing belt 9 and is moved in the front direction C (arrow) to move the front transport conveyor 4 PCBs transported by
Electronic component 10 is attached to 11. In addition, the detection device 7
Is sent to a control device (not shown), and the mounting direction of the transfer head 2 stored in this control device is corrected by the signal, and the mounting is normally performed.

A plurality of electronic components 10 that are asymmetric with respect to the direction in which they are aligned are aligned by the electronic component aligning device 3. FIG. 3 shows the electronic component 10a supplied in the normal direction, the electronic component 10a flowing in the alignment direction A,
Stop at the adsorption position of. The detection part of the detection device 7 is provided at a predetermined position of the alignment device 3, detects the foot 12 on one of the left and right sides of the electronic component 10a, and the signal from that detects the nozzle of the transfer head 2 by the control device. It descends, adsorbs the electronic component 10a, and ascends. The mounting direction of the electronic component 10a is set by rotating the transfer head 2 in the left-right direction B (arrow) with respect to the alignment direction A by the motor 8 and the timing belt 9. Further, the transfer head 2 is in the forward direction C.
(Arrow) to move the electronic component 10a on the printed circuit board 11.
Is installed.

When the direction of the electronic component 10 is normal, the above-mentioned operation is performed, but when the electronic component aligning device 3 causes the electronic component 10b to flow in the left and right opposite directions as shown in FIG. 4, the detection is performed. The device 7 does not detect the foot 12 on one of the left and right sides of the electronic component 10b as indicated by the arrow D, and issues a failure signal.
Then, the suction direction stored by the controller is set and the direction error of 180 degrees is corrected by the signal. That is, the transfer head 2
First, the suction operation is performed as it is, and in the mounting step, it is inverted 180 degrees in the left-right direction B (arrow) with respect to the alignment direction A by the timing belt 9 via the motor 8. As a result, the electronic component 10b is normally mounted on the printed circuit board 11.

As described above, according to this embodiment, when the electronic component 10b whose right and left are arranged in opposite directions is detected, the electronic component 10b is sucked by the transfer head 2 and the printed circuit board is picked up.
During transfer to 11, the electronic component 10b is horizontally flipped based on the discrimination result by the detection device 7 to correct its left-right orientation, and then the printed circuit board 11
Therefore, even if the aligning device 3 supplies the electronic component 10 in the left-right reverse direction, the direction of the electronic component 10 can be automatically corrected and properly mounted on the printed circuit board 11.

[0012]

As described above, according to the present invention, the detection device detects the foot of an electronic component, thereby determining the electronic component in which the left and right are aligned in opposite directions, and responding to the signal from the detection device. Then, the mounting direction of the electronic components sucked by the suction device is reversed to the left and right with respect to the alignment direction. As a result, the left and right directions of the electronic component are correctly corrected, and the electronic component is mounted on the board in the normal mounting direction. Therefore, even if the aligning device supplies the electronic components in the left-right reverse direction, the orientation of the electronic components can be automatically corrected and properly mounted on the printed circuit board.

[Brief description of drawings]

FIG. 1 is a perspective view of essential parts of an electronic component mounting apparatus according to an embodiment of the present invention.

FIG. 2 is an overall perspective view of an electronic component mounting device.

FIG. 3 is a perspective view of a normal aligned state of electronic components at a suction position.

FIG. 4 is a perspective view of an abnormal alignment state of electronic components at a suction position.

[Explanation of symbols]

 2 Transfer head 3 Alignment device 7 Detection device 10, 10a, 10b Electronic component 11 Printed circuit board 12 pairs

Claims (1)

[Claims] 1. A method of mounting an electronic component, wherein an electronic component having bilaterally asymmetrical legs is mounted on a substrate, wherein the electronic component is aligned on a aligning device and conveyed toward the substrate while the aligning device is conveyed. The left and right orientations of the electronic component are determined by detecting the foot by the detection device at the downstream position of the electronic component, and then the determination is performed by the detection device while the electronic component is adsorbed by the transfer head and transferred to the substrate. A method of mounting an electronic component, comprising: reversing the electronic component to the left or right based on the result to correct the left or right direction, and then mounting the electronic component on the substrate.