Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1981-01-08
1982-09-07
Knowles, Allen N.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
209933, B07C 5344
Patent
active
043482767
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an automatic testing apparatus for testing a printed circuit board of a television receiver etc. by a sequence of checking and adjustment steps.
BACKGROUND ART
Miniature component parts are realized in the printed circuit board of a television receiver, and various functional blocks such as a receiving system circuit block and deflection system circuit block are integrated on a sheet of printed circuit board. If the printed circuit board is manually tested, there are chances of introducing an erroneous checking or adjustment. Such a testing is also time-consuming. For this reason, there is a growing demand for an automatic testing apparatus.
DISCLOSURE OF INVENTION
This invention provides an automatic testing apparatus for automatically testing a printed circuit board, which comprises a frame-like pallet OR for carring a printed circuit board; a pallet supply device OC for supplying the pallet OR to a conveyor OD for testing process; a printed circuit board takeout device OB for placing a printed circuit board OS to the pallet which is supplied to the conveyor OD; an automatic parts testing device OF disposed in a fixed position on a path of conveyance of the printed circuit board OS by the conveyor OD and having upper and lower arm tables 20, 31 movable such that the printed circuit board OS is sandwiched therebetween, the lower arm table 31 having a contact pin 38 adapted to be contacted with the corresponding component part terminal on the printed circuit board OS, said automatic parts testing device OF being capable of electrically checking the component part through the contact pin; an automatic parts measuring/adjustment means 01, OK disposed in a fixed position on a path of conveyance of the printed circuit board OS passed through the automatic parts testing device OF and having upper and lower arm tables 150, 161 moved such that the printed circuit board carried to this position is sandwitched therebetween the lower arm table 161 having a contact pin 168 adapted to be contacted with the terminal of each part of the printed circuit board OS and at least a driver device adapted to be fitted into a to-be-adjusted component part on the printed circuit board for driving, said automatic parts measuring/adjustment means being adapted to measure the circuit or component part through said contact pin, while adjusting the component part by said driver device 158; and sorting means OG, OJ, OL disposed in a fixed position on a path of conveyance of the printed circuit board by the conveyor OD to lift the printed circuit board OS to permit it to be transferred to a conveyor for unfit printed circuit board if it is at least unfit, whereby checking is made as to whether or not a desired component part is loacated in a desired position on the printed circuit board, automatic adjustment is made such that the intended circuit has a desired characteristic, and these operations can be effected by a sequence of steps to permit the rapid and smooth testing of the printed circuit board as well as the positive checking, adjustment etc.
BRIEF DESCRIPTION OF THE DRAWINGS
This invention will be further described below by way of example by reference to the accompanying drawings in which:
FIGS. 1(a) and (b) are schematic view generally showing the preceding and following stages of a printed circuit board automatic testing apparatus according to one embodiment of this invention;
FIG. 2 is an explanatory view showing a board carrying pallet, pallet detection device, fit/unfit determining device and fit/unfit information pin as shown in FIG. 1;
FIG. 3 is an explanatory view showing one form of a drive means for a lifter, sorting device etc. of FIG. 1;
FIG. 4 is a schematic view showing an automatic parts testing device of FIG. 1;
FIG. 5 is an explanatory view showing a table arm section of the automatic parts testing device of FIG. 4;
FIG. 6 is a cross-sectional view for explaining the operation of the automatic parts testing device of FIG. 4;
FIG. 7 is an explanatory view showi
REFERENCES:
patent: 3472376 (1969-10-01), Broderick et al.
patent: 3896935 (1975-07-01), Hjelle
patent: 4128174 (1978-12-01), Frisbie et al.
patent: 4234418 (1980-11-01), Boissicat
Anzai Kuniaki
Tateishi Kazushi
Tomita Taketoshi
Knowles Allen N.
Tokyo Shibaura Denki Kabushiki Kaisha
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