Printed circuit board presser device in drilling machine
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United States of America Patent
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Apr 6, 1993
Grant Date -
N/A
app pub date -
Aug 1, 1991
filing date -
Dec 1, 1989
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a printed circuit board presser device in a drilling machine. The board presser device is arranged such that it includes an axially movable upper-plate presser device which is provided on the outer side of a contact surface of the board presser device with a printed circuit board so that a top end surface of the upper-plate presser device extends to the side of a table beyond the contact surface; and an urging device for pushing the upper-plate presser device against the table by a force larger than an attraction force generated from the board presser device. With such construction, an upper plate is suppressed from floating during drilling the printed circuit board, and a distance of useless transfer movement of a drill decreased, to thereby improve an efficiency of a drilling operation.
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