Geometrical instruments – Gauge – Collocating
Patent
1998-03-18
2000-11-07
Gutierrez, Diego
Geometrical instruments
Gauge
Collocating
33621, 33613, H01L 2168
Patent
active
061418854
DESCRIPTION:
BRIEF SUMMARY
THIS APPLICATION IS A U.S. NATIONAL PHASE APPLICATION OF PCT INTERNATIONAL APPLICATION PCT/JP97/00785.
FIELD OF THE INVENTION
The present invention relates to the field of component mounters for mounting electronic components on printed circuit boards.
BACKGROUND OF THE INVENTION
A printed circuit board positioning device of a component mounter in the prior art is explained with reference to FIG. 29.
In the prior art, a reference positioning pin 52 with a diameter corresponding to the reference positioning hole 3 of each type of printed circuit board 2 is prepared in advance. A printed circuit board 2 is positioned on an XY table 1 by replacing the reference positioning pin 52 with one which matches the reference positioning hole 3 in the printed circuit board 2, and inserting the reference positioning pin 52 into the reference positioning hole 3.
DISCLOSURE OF THE INVENTION
Diameters of reference positioning holes vary according to manufacturer, product, and the size of the printed circuit board. A printed circuit board positioning device of the prior art may require the preparation of a reference positioning pin for mounters which match the reference hole of each type of these differing types of printed circuit boards, and may also require the replacement of the reference positioning pin when changing the type of printed circuit board, resulting in lower productivity due to the time lost during model changeover.
The present invention offers a printed circuit board positioning device which may eliminate or minimize the need for replacing the reference pin in response to the wide range of diameters of reference positioning holes found in printed circuit boards.
The present invention employs a reference positioning pin with stepped outer diameters or with built-in nested sleeves, in two-layer or three-layer form, for positioning reference positioning holes of different sized diameters using one or a minimum number of reference positioning pins.
With the above configuration, the present invention may eliminate or minimize the need for replacing the reference positioning pin every time the diameter of the reference positioning hole in the printed circuit board changes.
The present invention is a printed circuit board positioning device of an electronic component mounter which positions a printed circuit board on an XY table, for example, by inserting the reference positioning pin into the reference positioning hole on the printed circuit board. The invention employs a multi-stepped reference positioning pin so that reference positioning holes of several different sized diameters can be positioned using one reference positioning pin. This may eliminate or minimize the need for replacing the reference positioning pin every time the diameter of the reference positioning hole is changed in order to position printed circuit boards, thereby reducing production loss due to time lost during replacement of the reference positioning pin.
A further embodiment of the present invention is a printed circuit board positioning device of an electronic component mounter which positions a printed circuit board on an XY table, for example, by inserting the reference positioning pin into the reference positioning hole on the printed circuit board. The invention employs a reference positioning pin with nested and sleeved pins enclosed therein which slide by spring force. The use of this compound reference positioning pin enables the positioning of different sized reference positioning holes using one reference position pin. This may also eliminate or minimize the need for replacing the reference positioning pin every time the reference positioning hole diameter is changed thereby reducing production loss.
Another embodiment of the present invention is a printed circuit board positioning device of an electronic component mounter which positions a printed circuit board on an XY table, for example, by inserting the reference positioning pin into the reference positioning hole on the printed circuit board. The present inventi
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Ishitani Yasuyuki
Seno Makito
Takaichi Susumu
Tomita Kiyoshi
Gutierrez Diego
Matsushita Electric - Industrial Co., Ltd.
Smith R. Alexander
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