JPS6122267A - Mount structure of testing jig and testing method by said testing jig - Google Patents

Abstract

PURPOSE:To facilitate the replacement of a jig by the hand of a robot and to certainly perform the placement of the jig to a testing device, by providing a grasping plate, which has a projection for facilitating the connection and location with the hand of the robot, to the jig itself. CONSTITUTION:A fixture G10 is mounted to a tester at the predetermined position thereof as a testing jig and a top plate G11 for masking a probe pin by a test pattern is placed on said fixture G10. Thereafter, a printed circuit board Pt is placed on said top plate G11 and sucked by a sucking machine so as to be closely contacted therewith to perform a test. Flange parts 801, 802 are provided to both sides of the fixture G10 and the top plate G11 in a state removing the part to which the holding parts 61 of a robot hand 6 is impinged. By this structure, the inside corner parts of both side flange parts 801, 802 are impinged to the holding parts 61 of both side pair of the robot hand to secure certain holding and the stacking of the fixture, the top plate and the printed ciucuit board becomes easy and the lateral oscillation of the robot during movement can be prevented.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a mounting structure for a test jig used for circuit testing of printed board units, etc., and a test method using the same, and particularly relates to a mounting structure for a test jig used for circuit testing of printed board units, etc. The present invention relates to an effective mounting structure for a test fixture (jig) and its test control method in a printed board manufacturing system that automatically replaces jigs.

[Conventional technology]

When automatically replacing an in-sakit type jig with a robot, etc., the usual jig structure does not allow for operations such as grasping with the robot's nose, so advanced technology is required for automation. Ta.

FIG. 7 shows an outline of this kind of conventional test system.

In Fig. 7, when testing a printed board unit PT, which is a product, a tester IC such as an in-circuit board tester is used.
A test jig G called a test fixture is manually mounted on the test board of T, and the printed board unit (Pt) to be tested is placed at a predetermined position on this test jig G. One test item is controlled by the installed control device.
−.

Therefore, there is no need for standardization when mounting these jigs and printed board units manually, and even if a connection failure between the test machine ICT and the printed board unit occurs during the test procedure, If you want to try again, please try again as long as you have the manpower) & manually turn off and on the vacuum etc. to make the unit stick to the fixtear, and then turn it on and off.
This was possible by performing kidney conditioning.

[Problem that the invention seeks to solve]

However, as communication equipment and other devices become more multi-functional, the printed board units used in them are increasingly produced in small quantities with a wide variety of types.
Therefore, the number of types of jigs increases depending on the test content of various printed boards.

Additionally, various testing equipment may also be capable of unmanned operation in order to increase production, and there is a desire to fully automate the entire system using robots.

The problems that arise are, firstly, the difficulty in positioning jigs and the like when automatically installing them using robots during testing, and secondly, the difficulty in ensuring that the jigs and printed boards are in the correct position. Thirdly, it is a detection process for a setting error when setting a product in an in-situ tester or the like by a robot. In particular, as a solution to the third problem, automatic detection using sensors, microswitches, etc. may be considered, but with this method, a detection device must be installed for each jig, and furthermore, If the shapes are different, it may become difficult to install the detection device itself.

[Means for solving problems]

The present invention solves all of the above problems, and the jig itself is provided with a grasping plate having a protruding part that facilitates connection with the robot's hand, thereby ensuring reliable placement in the testing area. , In the control on the testing machine side, it is determined whether the jig and printed board are placed in the specified position by checking the presence or absence of continuity between the probe pin and the printed board, and furthermore, it is the same as detecting test defects in each test part. It is equipped with a retry function to repeatedly perform the test.

[For production]

In the present invention, the gripping plate of the robot hand is attached to the jig, and its gripping position is regulated by a protruding part to ensure the placement of the jig and printed board, and test control is performed to check whether or not the jig is placed and to check for poor contact. It becomes possible to accurately know whether the product is suitable or not by checking the contact of the probe pin and using the retry function.

〔Example〕

As an example of an automated system according to the present invention, FIG. 3 is a schematic configuration diagram of a comprehensive testing system as an example of a printed board unit manufacturing system. Various test equipment (9, 10
, 11, 12) are connected by a rotary stocker 1,
This rotary stocker includes a storage section 19 for products (printed board units) and jigs, and a storage section 20. Equipped with a device (2, 3, 4, etc.) that fully automatically supplies/discharges products and jigs to each test device, and a magazine (13, 4, etc.) that stores a predetermined amount of each product and jig.
18) Stocked in units in a rotary stocker.

Then, the main control device 15 controls the rotary stocker control device 14. The control unit (23°, 24, etc.) of the testing device is controlled, the entire stocker rotates, magazines are fed and discharged at predetermined locations, and component tests, 1 functional tests, comprehensive tests, etc. are conducted in sequence.

Further, the rotary stocker is equipped with a defective product discharge section 21 for discharging products that have failed the test.

FIG. 3 CB) is a plan view illustrating the operation mode of the system, centering on the rotary stocker in the overall system configuration diagram shown in FIG. 3 (4). An example of this system's configuration is stocking and transporting printed boards and test jigs.

Using a two-stage rotary stocker developed for multi-purpose use such as supply, the position and number of entry/exit ports can be changed freely, making it easy to add or reduce equipment such as testing equipment depending on the size of the installation space. This is the result. Magazine 13゜18 containing printed boards and jigs is the control unit of the system $1
According to the instructions of step 5, the rice test equipment is connected to the rotary stocker 1 and freely transported to the rice test equipment 9, 10° 11.12. /13.18 is rotary stocker 1
The macadine is stored in trays within the container, and each tray is connected to transport the macadine. The test device 9 is, for example, an in-circuit tester, and jig products, etc., are sent to this tester through a jig magazine 1.
Supply and discharge device for supplying and discharging 8 4. Magazine 13 for printed boards
The rotary stocker 1 is
supplied or discharged from Each p1 unit in the magazine is transferred from the robot 51C to the tester 9, and the circuit components on the printed board are tested by the tester 9. As for the supply/discharge devices 2 and 3 of printed board magazines, those to be tested are received by the supply/discharge device f3, and defective products are returned to another supply/discharge device 2. Other devices include, for example, a telephone 9:, a trunk bagge used for switching equipment, etc.

Circuit function test device 10 for performing operation tests, etc. for subscriber circuit packages. Power supply function test device 11 for testing the operation of a power supply package. Other devices 12 and the like to be added are arranged. After the test, non-defective magazines are outputted from the unloading section 20, and defective articles are outputted from the NG discharging section 21, sent by a roller conveyor 26, analyzed for defective parts, repaired at a repair area 27, and can be re-inputted. Furthermore, the empty space 25 of the rotary stocker 1 can be used to further add testing equipment and the like. In addition, 6 shown in the first country is the hand of the robot 5, 16 and 17 are the transfer parts that send out printed boards and jigs in units of units, respectively, and 22 shows the stand on which the printed boards are temporarily placed after the test. (omitted in FIG. 3(B)).

The control commands ■, ■, ■ from the control section 15 in FIG. NG exhaust section 21. This indicates that the output is being output to the control section of another functional test device.

FIG. 4 is a diagram illustrating the control system of the system of the present invention. Each test device, for example, the inner kit tester 91, the control section 23.100, 110 of the functional test device 10, 11.12, and the control section 500.1 of the robot 5. Control unit 400 of jig magazine supply/discharge device 4. Magazine supply/discharge device for printed boards 2.
3 control unit 200. Rotary stocker control unit 111
etc. receive control commands from the higher-level control device 15. This control device has all the scheduling functions in the operation of this system.

In an automated system such as that described in FIGS. 3 and 4, a robot transfers printed boards, jigs, etc. between the testing machine and the storage device.

FIGS. 5 and 6 are explanatory diagrams showing the relationship between the printed board and the jig. An in-circuit tester places a test probe bottle on the land or circuit pattern on the back of a printed circuit board, and checks whether the resistors, capacitors, etc. have the specified values, and whether the overall voltage is within the specified value. The test will be carried out by comparing with test data etc., and the test machine will be equipped with fixture G as a test jig.
. is placed in a predetermined position, and a top plate GII is placed on top of the top plate GII that masks the prog bottle with a test pattern.Then, the printed board Pt is placed on top of the top plate GII, and the printed board Pt is suctioned with a suction device (not shown) to bring the printed board into close contact with the test pattern. ◇Therefore, each jig and the printed board to be the product are moved by the robot's hand 6 through the supply/discharge device as described above. Fixture G is used to facilitate the stacking of this fixture, top plate, and printed circuit board, and to prevent lateral vibration during movement by the robot. , brim portions 801 and 802 are provided on both sides of the top plate an, excluding the portion where the holding portion 61 of the robot hand comes into contact. That is, the inner corner portions of the brim portions 801 and 802 on both sides touch the holding portions 61 on both sides of the robot hand to ensure secure holding.

Furthermore, a patent application was filed by the same applicant on February 8, 1981 regarding the structure of the hand holding section that can hold either a printed board or a fixed wheel.
Learn more about "Robot Hand".

Top Brake shown in Figure 6) Board 8 of G, .
Reference numeral 05 is a board for selectively putting out probe bins in a predetermined pattern, and 804 is a guide bin for placing a printed board. Also fixture GI.

803 indicates a boss bin during assembly.

Next, in order to explain the test control according to the present invention, the configuration of an in-situ tester will be described below as an example.

FIG. 1 shows an example of the system configuration according to the present invention. When the top plate G11 and the printed board pt are placed on the fixture GIO (from the robot hand V),
Selected prog pins in the fixtures come into contact with the distribution pattern, land, etc. from the back side of the printed board pt. And fixture G. Connector 23 to
The five connected testing devices (23) are interfaced by a control unit 231, an analog skin driver sensor device @232, and a digital driver/sensor device 234.

Further, the control ill 231 operates the vacuum pump 236 by the drive valve 237 to bring the printed board pt into close contact with the fixtures G and O. And by program control,
Perform aptitude tests for parts a and b mounted on the printed board pt. This control unit 231 includes a display 245° keyboard 2461, which is well known as a processing system.
Take 240. Floppy disk 239. Various devices such as a printer 238 are connected.

Therefore, as a test control of the control section 231, a printed board unit trial is performed according to the control procedure shown in FIG.

As explained earlier in FIG. 2, the test begins when the robot hand places the printed board on the fixture and finishes 1f. First, turn on the drive valve 237 and turn on the pakim (2). Here, one of the features of the present invention is to apply an instantaneous pulse to the probe bin (bus pin) to determine whether there is a set of units, that is, whether or not the printed board is correctly placed. ■ Check the change in potential caused by contact. What should be noted here is that in vacuum suction type in-situ testers, if the product is incorrectly set, air will leak, the product will not be properly fixed to the fixture, and all pins will not be able to contact each other. If there is no contact at all in all the bins, it is determined that the product has been set incorrectly, and the test is terminated in the same way as when there is no product (NG).

If the potential of even one pin is confirmed, it is determined that the product is set correctly, and then a contact check is performed on the power line as a contact check■0 If it is defective at this stage, the various tests are meaningless and the product is tested as defective. end.

Next, if the power supply contact check is normal, the process moves to another feature of the present invention. In other words, the test program is divided into several blocks, and if defective data is detected in the processing within each block, the suction processing (turning off and on of Paquim) is retried, and the test within the same block is performed again to detect the error. Data is output for each test component in each block, making it easy to identify poor contact and error locations.

For each block, set the IJ) number of times n, 1
Test the block ■Decrement the 0 test retry counter and check whether an error has occurred■. If no error occurs, move to the next block.

If an error occurs, it is determined whether the retry counter is 101 or not. If it is not '01, the test is repeated.

return. If an error occurs even after the number of retries has been completed (n=0), data is output as a failure detection and the process moves to the next test.

〔Effect of the invention〕

As explained above, according to the present invention, the jig can be easily replaced by the robot's hand, the jig and printed board can be set accurately, and the printed board, jig, etc. can be set at the start of the test. Errors can be detected through program control, eliminating the need for external accessories such as sensors, and further improving test reliability by preventing product defects due to poor contact with the in-situ tester. It facilitates automation and enables unmanned operation.

[Brief explanation of drawings]

Figure 1 shows the system configuration of the printed board test control according to the present invention, Figure 2 is the flowchart of the test control of the present invention, and Figure 3 (
4) is a schematic configuration diagram of a test system as an example of a manufacturing system for printed board units, Figure 3 (B) is a diagram explaining the operational form of the entire national system in the 3rd trial,
5 and 6 are diagrams showing the relationship between the printed board and the jig, and FIG. 7 is a side view of the conventional system configuration. GIo: Fixture (jig

Claims (3)

[Claims] (1) A test jig for printed circuit boards, etc., characterized by being equipped with a grasping plate provided with a protrusion that regulates the grasping position of a robot hand that transfers boards between a board stocker and a testing device. Mounting structure of test jig. (2) In a method of controlling a test jig for a printed circuit board, etc., a control device of a test device in which a jig, a printed circuit board, etc. are placed in a predetermined position controls the control device between the jig and the printed circuit board, etc. A test method using a test jig, characterized in that it is determined whether or not the printed circuit board is correctly installed on the jig by determining whether there is conduction or no conduction in at least part of it. (3) In a test control method for a test jig for a printed circuit board, etc., when a control device of a test device placed at a predetermined position detects a test defect during connection test control between the jig and the printed circuit board, , a test method using a test jig, characterized in that the same test is retried a preset number of times.