JPH0726914B2 - Automatic inspection equipment for printed wiring boards - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic inspection device that automatically inspects the number of holes in a printed wiring board to determine the quality of the printed wiring board.

(Prior Art) Conventionally, the number of holes in a printed wiring board that first passes through an optical sensor is used as set hole number data, and the number of holes in the printed wiring board is measured by an optical sensor and compared sequentially with the set data. An inspection device for inspecting the quality of a printed wiring board is known. In this case, the mechanism for clearing the set hole number data is such that the operator judges the end of the lot each time a particular lot is finished, and either clears the set hole number data, or sets the lot number for each lot number when loading it in the feeder in advance. The number of inspections and the number of holes were input, the number of printed wiring boards was detected immediately before the number of holes was measured, and the set number of holes data was cleared sequentially.

(Problems to be solved by the invention) However, in the conventional technology as described above, the lot of printed wiring boards is small, and there are many pieces of 10 or less, so it is necessary to frequently change the set hole number data. A person for this was required, and the end of the lot was mistaken or the data setting was mistaken. In view of the above-mentioned problems, the present invention is to provide a printed wiring board inspection apparatus capable of automating the end of a lot and the setting of the number of holes.

(Means for Solving the Problem) In order to solve the above problems, the present invention first sets the number of holes of a printed wiring board passing through an optical sensor as set hole number data, and sets the number of holes of the printed wiring board. In the inspection device that inspects the quality of the printed wiring board by sequentially measuring it with an optical sensor and comparing it with the set data, the set hole number data is cleared when the board with no holes passes the sensor. Use means.

(Operation) By using the above-mentioned means, it becomes possible to automatically recognize the change in the set hole number by the inspection device by sandwiching the lot division plate having no holes between the lots. It is possible to automatically inspect a wide variety of lots at once.

(Example) The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a flow chart showing an embodiment of the present invention,
The figure is the same block diagram, FIG. 3 is the same perspective view, and FIG.
FIG. 5 is a perspective view of the same inspection principle, and FIG. 5 is a side view of a printed wiring board in a stacked state. A lot division plate 31 having no holes between the lots is sandwiched in advance. The printed wiring boards 13 that are stacked and the lot dividing boards 31 that are not sandwiched between them are carried one by one from above onto a belt conveyor 11 by a feeder (not shown). Next, the printed wiring board 13 and the lot division plate 31 are placed on the belt conveyor 11 by the belt conveyor 11 in the line sensor box 12
They are carried inside one after another and discharged again outside one after another. In the line sensor box 12, the CCD line sensor 23 detects the light of the lamp 21 and the light reflected by the mirror 22. At that time, if there is the printed wiring board 13, light passes through the hole and reaches the CCD line sensor 23, but the hole does not pass through other portions and the CCD line sensor 23 cannot detect the light. Of course, the CCD line sensor 23 cannot detect light because there is no hole in the lot division plate 31. Utilizing this, data on the number of holes in the printed wiring board 13 and the lot division plate 31 is obtained.

Further, the data of the number of holes determines whether or not the number of holes is 0, and if it is not 0, the printed wiring board 13 to be inspected is determined,
It is determined whether or not the hole number setting mode is set, and if it is the hole number setting mode, the data is stored as it is in the RAM as the set hole number data, and then the mode is changed to the comparison mode. In the comparison mode, the set hole number data is compared with the detected hole number data, and if they are different, an error signal is generated. If it is 0, it is determined that the lot partition plate 31 indicates the end of the lot, the set hole number data so far is erased, and the mode is set to the hole number setting mode. By repeating this, the inspection of the number of holes in the printed wiring board is completed.

(Effects of the Invention) Since the present invention is configured as described above, it has excellent practical effects as shown below, that is, according to the automatic inspection apparatus for a printed wiring board of the present invention, a small lot of printed wiring boards is obtained. It is possible to automatically detect the number of holes in each printed wiring board of a lot of more lots without spending a lot of people.

[Brief description of drawings]

FIG. 1 is a flow chart showing an embodiment of the present invention,
FIG. 4 is a block diagram of the same, FIG. 3 is a perspective view of the same, FIG. 4 is a perspective view of the same inspection principle, and FIG. 11 …… Belt conveyor 12 …… Line sensor box 13 …… Printed wiring board 21 …… Lamp 22 …… Mirror 23 …… CCD line sensor 31 …… Lot classification 0

Claims (1)

[Claims] 1. A pudding wiring by first setting the number of holes in a printed wiring board passing through an optical sensor as set hole number data, measuring the number of holes in the printed wiring board by an optical sensor, and sequentially comparing the number with the set data. An automatic inspection device for printed wiring boards, characterized in that in a device for inspecting the quality of a board, the number of set holes is cleared when a plate that has no holes at all passes a sensor.