JPH03229499A - Apparatus for visual inspection of electronic circuit board - Google Patents

Abstract

PURPOSE:To eliminate overlooking of an area to be inspected and also to prevent the possibility that an electronic component mounted on an electronic circuit board, a wire bonding part, etc., are impaired, by a method wherein positioning of the area to be inspected on the board, bringing-in and delivery of the board and takeout and storage thereof are subjected to an electronic control. CONSTITUTION:Fractionated areas to be inspected on an electronic circuit board 21 are shifted through a field of vision of an inspector 4 sequentially by a positioning element 2 subjected to an electronic control by an electronic control device 20. Besides, a bringing-in conveyor 5 and a delivering conveyor 6 whereby the board 21 is brought in onto and delivered from a board table 3 of the positioning element 2, and a delivering element 7 and a storage element 8 whereby the board 21 is taken out of and stored in a magazine, are subjected to the electronic control, and thus the board 21 is supplied to and delivered from the board table 3 sequentially without relying on the hands of an operator.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a visual inspection device for electronic circuit boards that visually inspects electronic circuit boards while sequentially conveying them. This invention relates to a visual inspection device for electronic circuit boards that is configured to electronically control storage, loading/unloading, and positioning to prevent the inspection area of the board from being overlooked and to improve the efficiency of visual inspection. be.

(Prior art) After mounting electronic components on an electronic circuit board by soldering, visually inspecting the mounting state of the components and the soldering points between the board and the components is a method of guaranteeing the reliability of the electronic circuit board. This is an important issue in order to respond to improvements.

In general, traditional visual inspection of electronic circuit boards is performed by
The operator places each electronic circuit board on a work table provided on the workbench and moves the area to be inspected on the board by hand, thereby viewing the area to be inspected on the board in an enlarged manner. The electronic circuit board was visually inspected using an inspection mirror.

Furthermore, when visually inspecting a plurality of electronic circuit boards, the above operations had to be repeated many times.

(Problems to be Solved by the Invention) However, according to the above-mentioned conventional visual inspection of electronic circuit boards, it is necessary to visually inspect the details of the mounting state and soldering state of electronic components mounted on the electronic circuit board. Therefore, by using an inspection mirror that magnifies the details, the area to be inspected on the board can be subdivided into multiple parts, and the operator can perform a visual inspection while moving the area to be inspected by hand. There was a problem that there was a possibility that the prefecture would be skipped.

In addition, each worker must place the electronic circuit board on which electronic components are mounted on the work table and move the area to be inspected, so there is a risk that the board may be contaminated by the worker, or There was a problem in that electronic components and wire bonding parts, etc., which had been removed were damaged.

Furthermore, when visually inspecting a large number of electronic circuit boards,
The circuit boards are stored in a magazine that can store multiple boards, and batch processing is performed for each magazine. However, the complicated work of taking out each electronic circuit board from the magazine, visually inspecting it, and repacking it into the magazine is required many times. This poses a problem in that the operator cannot concentrate on the visual inspection and the work efficiency is reduced.

The present invention has been made in view of the above-mentioned circumstances, and when visually inspecting the area to be inspected by subdividing the area to be inspected on an electronic circuit board,
By eliminating the possibility of missing inspection areas (1) and (2) eliminating the need for workers to directly touch electronic circuit boards,
A visual inspection device for electronic circuit boards that prevents damage to electronic components, wire bonding parts, etc. mounted on the board, and eliminates the complicated work of taking out, storing, and moving the board. It provides:

(Means for Solving the Problem) In order to achieve the above object, in a visual inspection device for electronic circuit boards that visually inspects electronic circuit boards, a positioning unit that positions an area to be inspected on the electronic circuit board is provided. and,
An inspection mirror located above the positioning unit and capable of magnifying the area to be inspected; a carry-in conveyor configured to carry electronic circuit boards into the positioning unit; and an electronic circuit board housed in a magazine. It has a delivery section configured to deliver the electronic circuit board to the delivery conveyor, an delivery conveyor configured to transport the electronic circuit board from the positioning part, and a storage part that stores the electronic circuit board in the magazine. The above object is achieved by electronically controlling the delivery and storage of circuit boards, the loading and unloading, and the positioning of the inspection area.

(Function) In the present invention, the positioning unit for positioning the area to be inspected on the electronic circuit board is electronically controlled so that the area to be inspected can be viewed magnified using an inspection mirror. The subdivided inspection areas can be sequentially visually inspected.

In addition, the loading and unloading conveyors that carry in and unload the boards, and the delivery section and storage section that take out and store the boards in the magazine are electronically controlled, so that electronic circuit boards are sequentially supplied to the positioning section. Can you send it out?

(Example) Embodiments of the present invention will be described in detail based on sections.

Section 1 is a partially cutaway perspective view showing an embodiment of the visual inspection apparatus for electronic circuit boards according to the present invention, and Figure 1 is a perspective view showing the main parts of this embodiment.

In this embodiment, an electronic circuit board 21 housed in a delivery magazine 9.9 is supplied to a board table 3 provided in a positioning section 2 by an incoming conveyor 5, and an area to be inspected on the board is visually inspected using an inspection mirror 4. After inspection, unloading conveyor 6
The visual inspection device 1 configured to be sent out and stored in a storage magazine 10.10 is controlled by an electronic control device 20 such as a computer.

Visual inspection table 15a on which a worker performs visual inspection work
The visual inspection table 15 provided with this is manufactured by welding steel or the like.

On both sides of the table 15, a delivery table 16 and a storage table 17, which are manufactured by welding steel or the like to be lower than the table 15, are arranged in close contact with each other.

At the lower center of the visual inspection table 15a, a horizontal axis moving section 2a and a vertical axis moving section 2b are arranged at right angles vertically and horizontally. On the top surface of the positioning unit 2, which is provided with a positioning unit 2 equipped with a moving mechanism 2c, an electronic circuit board 21 on which electronic components, etc. are mounted, and a substrate 3 on which the electronic circuit board 21 is placed are mounted. It is provided.

The substrate table 3 is exposed above the visual inspection table 15a by forming a substrate table hole 15b in the visual inspection table 15a.

Above the substrate table 3 is a visual inspection table 15a.
It has an eyepiece part 4a that is inclined toward the front worker side, and an opposite board part 4b that faces the area to be inspected of the electronic circuit board 21.
An inspection mirror 4 is provided that allows an enlarged view of the area to be inspected.

On the other hand, a large number of electronic circuit boards 21 to be visually inspected are packed into a delivery magazine 9.9, which is provided with a handle 9a on the top surface for carrying, by a packing mechanism (not shown).

The delivery magazine 9.9 is placed on a delivery table 7a provided in the delivery section 7.

The delivery unit 7 includes a delivery table 7a, a motor 7b for vertically driving the table 7a, a limit switch 18, 18 for limiting the operating range, and a delivery mechanism 70 for operating a substrate extrusion device (not shown). is provided,
It is placed on a delivery table 16.

The electronic circuit board 21 sent out from the delivery magazine 9.9 is conveyed in the direction of the arrow in the figure by the carry-in conveyor 5, which has a motor 5b that drives the conveyor 5a.

The electronic circuit board 21 transported by the carry-in conveyor 5 is
The substrate is supplied and placed on a substrate table 3 provided in the positioning section 2.

The substrate 21 is moved by the vertical and horizontal moving machine fl of the positioning unit 2 according to the inspection area subdivided based on the field of view of the inspection mirror 4.
12c are electronically controlled by the electronic control device 20 and move sequentially.

Inspection area: 'i, by sequentially moving the inspection mirror 4
visually inspected by the operator.

The visually inspected electronic circuit board 21 is conveyed in the direction of the arrow in the figure by a conveyor 6a of a carry-out conveyor 6 having a conveyor 6a driven by a motor 6b.

The electronic circuit board 21 carried out by the carry-out conveyor 6 is
Placed on a storage table 8a provided in the storage section 8,
A large number of boards 21 can be stored, and a handle 10 is provided on the top surface.
A is stored in the storage magazine 10.10' provided with a storage mechanism (not shown).

The storage section 8 includes a storage table 8a and a storage table 8a.
A storage machine 1118c is provided, which includes a motor 7b that drives the substrate up and down, a limit switch 19, 19 that limits the operating range so as not to deviate from the operating range, and a substrate storage device (not shown).

At this time, the carry-in conveyor 5, the carry-out conveyor 6, the sending section 7, and the storage section 8 are electronically controlled by an electronic control device 20.

An electronic control unit 20 with a built-in computer, etc., and an operation unit 2 into which electronic control procedures can be input via a harness 20b.
0a, and is also connected via a hook 20c to an operation panel 1, which is provided with an operation button 12 and is used by an operator to issue electronic control commands during visual inspection.

Therefore, the visual inspection device l allows the operator to perform a visual inspection.
While operating the operation button 12 of the operation panel 11 as necessary, the electronic circuit board 21 to be visually inspected is sent out from the delivery magazine 9.9 for visual inspection, and then the storage magazine 10.10 The structure is such that the visual inspection process is repeated sequentially.

Additionally, if any abnormality occurs during the operation of the visual inspection device 1, the emergency stop section 13.13 will detect it and stop the visual inspection device 1, and the emergency light 14.14 will also stop the visual inspection device 1.
The system is designed to notify the operator by lighting up the icon.

At this time, the operator discovers the cause of the stoppage of the visual inspection device 1, removes it, and restarts the visual inspection device 1.The visual inspection JA device 1 is configured as described above. For,
The subdivided inspection target area on the electronic circuit board 21 is controlled by the positioning section 2 that is electronically controlled by the electronic control device 20.
Since the field of view of the inspection mirror is sequentially moved, visual inspection can be performed without skipping any area to be inspected.

Further, a carry-in conveyor 5 and a carry-out conveyor 6 that carry the substrate 21 into and out of the substrate table 3 of the positioning unit 2;
Since the delivery section 7 and the storage section 8, which take out and store the substrate 21 in the magazine, are electronically controlled by the electronic control device 20, the substrate table 3 can be moved without manual intervention by an operator.
The substrates 21 can be sequentially supplied and sent out.

Note that the electronic circuit board may be a hybrid integrated circuit board or a copper-clad laminate board.

Further, the visual inspection device does not need to be equipped with electronic components, and may be used to visually inspect a printed pattern after etching, for example, on a thick film resistor substrate.

In addition, the electronic control unit can be used instead of a general-purpose computer.
A dedicated IC containing electronic control procedures in ROM may also be used.

(Effects of the Invention) Since the electronic circuit board visual inspection apparatus according to the present invention is configured as described above, it has the following effects.

(A) Visual inspection is performed using an inspection mirror because the subdivided inspection area on the electronic circuit board is sequentially moved to the field of view of the inspection mirror by a positioning unit that performs positioning under electronic control. This has an excellent effect in that it is possible to prevent the inspection area from being overlooked when the inspection occurs, and it is possible to provide a highly reliable electronic circuit board.

B) In addition, since the electronic circuit boards are carried in and out of the board table in the positioning section and taken out and stored in the magazine by electronically controlled automated processes, the operator is not required to do so manually. One excellent effect is that the operator does not have to touch the board, thereby preventing the risk of contamination of the board by the operator and damage to the mounted electronic components, wire bonding parts, etc.

(C) Furthermore, when performing batch processing on a magazine-by-magazine basis, it has the excellent effect of freeing the operator from complicated work, allowing him to concentrate on visual inspection, and improving work efficiency. 6

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a visual inspection apparatus for electronic circuit boards according to the present invention, and FIG. 2 is a perspective view showing the main parts of this embodiment. ■ ・ ・ ・ 2 ・ ・ ・ 4 ・ ・ 5 ・ ・ ・ 6 ・ ・ 7 ・ ・ 9 10, 1 11 ・ ・ 20 ・ ・ 20a ・ 21 ・ ・ Visual inspection device, positioning unit, inspection mirror, loading Conveyor, unloading conveyor, sending section, 8... storage section, ... sending magazine 0... storing magazine, - operation panel, - electronic control device, - operating section, - electronic circuit board. Figure position - Law section Inspection mirror Conveyance Conveyor Sending section Storage section Sending out Maccasino storage Magazine operation panel Electronic control device α〕

Claims (1)

[Claims] (1) A visual inspection device for electronic circuit boards that visually inspects electronic circuit boards includes a positioning unit that positions the area to be inspected on the electronic circuit board, and a positioning unit located above the positioning unit that positions the area to be inspected. an inspection mirror that enables magnified viewing; a carry-in conveyor configured to carry an electronic circuit board to the positioning section; a delivery section that sends out the electronic circuit board stored in a magazine to the carry-in conveyor; It has an unloading conveyor configured to unload the electronic circuit board from the transfer section, and a storage section configured to store the electronic circuit board in a magazine, and further includes a conveyor configured to unload the electronic circuit board from the transfer section, and a storage section configured to store the electronic circuit board in a magazine. A visual inspection device for electronic circuit boards characterized by electronically controlling positioning.