JPH0495881A - Electric check device of printed wiring board - Google Patents

Abstract

PURPOSE:To simply make possible setting of both check plates in a short time by vertically moving both the upper and lower check plates with the vertical movement of an elevator to bring a probe needle into contact with a printed wiring board. CONSTITUTION:As an outer preparatory plan upper and lower check plates 220, 210 are aligned to upper and lower bases 22, 21 of a checker head 2 in a condition to be removed from an elevator 1 to mount the head 2 on the elevator 1 from the transverse direction. Thereafter the plates 220, 210 are vertically moved through the bases 22, 21 along a pole guides 231 as a guide with the vertical movement of the elevator 1 for operating for a continuity test of a printed wiring board 8 to bring a probe needle of the plates 220, 210 into contact with the upper and lower sides of the board 8 on a stripper plate 31. At this time, current conducting is performed on the board 8 from a continuity tester 4 through the one hand and current is allowed to flow on the other hand, but the current is not allowed to flow on a defect pattern to detect a defect. As the result the plates 220, 210 can be set in a short time simply.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is an electrical check device for a printed wiring board for testing electrical continuity of the printed wiring board.

[Prior art]

To test the electrical continuity of a large number of conductive patterns provided on a printed wiring board.

It is necessary to attach a different upper check plate and lower check plate to the lifting device for each printed wiring board.

In other words, the conventional electrical check device for printed wiring boards is
As shown in FIG. 6, an upper check plate 92 and a lower check plate 93 are separately fixed to the lifting mount N91.

For this fixing, the upper check plate 92 and the lower check plate 93 are positioned with respect to the lifting device 91 in the front-rear direction (X), left-right direction (Y), and turning direction (θ) by trial and error.

Although not shown in the drawings, in a conventional electrical check device for a printed wiring board, positioning pins of the lifting device 91 may be used to position the upper check plate 92 and the lower chain plate 93.

In this case, the lifting device 91 is stopped once, and then the upper check plate 92 and the lower check plate 93 are positioned. Then, the upper check plate 92 and the lower check plate 93 are fixed to the lifting device using fixing bolts. . Further, when inspecting nine different types of printed wiring boards, the fixing bolts are removed each time, and the upper check plate and lower check plate are replaced.

The above upper check plate 92 and lower check plate 9
3, each has a probe needle 940 installed therein so as to be movable forward and backward. The probe needle 940 is connected to a continuity tester 94.

During inspection, the upper check plate 92 and the lower check plate 93 are moved up and down by the vertical movement of the lifting device [91], and the probe needles 940 are brought into contact with the printed wiring board.

[Problem to be solved]

However, in the conventional electric check device of the printed wiring board, the upper check plate 92 and the lower check plate 93 must be separately fixed to the lifting device 91, and the X of both check plates must be fixed by trial and error. ,Y.

It is not possible to perform external setup for positioning in the θ direction, that is, for the first positioning of the above-mentioned mounting of both check plates.

Further, even when positioning the upper check plate and the lower check plate using the positioning pins of the lifting device, external setup is not possible and it is necessary to stop the lifting device. Therefore, the stopping time of the elevating device becomes longer and the efficiency of one work is lowered.

In view of such conventional problems, the present invention allows the upper check plate and the lower check plate to be easily set in a short time. The present invention aims to provide an electrical check device for printed wiring boards.

[Means for solving problems]

The present invention comprises an elevating device, a cassette-type checker head that can be attached and detached laterally to the elevating device, and a stripper plate disposed in the center of the checker head and fixed to the elevating device, Further, the above-mentioned checker head is an electrical check device for a printed wiring board, in which a probe needle connected to a continuity tester is embedded. The checker head includes a lower base having a lower check plate, and an upper base having an upper check plate, and between the lower base and the upper base.

A pole guide column is provided to guide the vertical movement of both, and the probe needle is installed in each of the upper check plate and the lower check plate so as to be movable forward and backward. The stripper plate has guide pins for positioning the printed wiring board, and is configured to be located between the upper check plate and the lower check plate when the checker head is mounted on the lifting device. . As the lifting device moves up and down, the lower check plate and the upper check plate move up and down via the lower base and the upper base to bring the probe needle into contact with the printed wiring board on the stripper plate.

The most noteworthy feature of the present invention is that the cassette is composed of a lower base having a lower check plate and an upper base having an upper check plate, and the vertical movement of the lower base and upper base is guided by a ball guide column. A type of checker head is provided, and the checker head is arranged to be removably attached laterally to the lifting device.

In the present invention, the ball guide column has at least two
A book will be set up. When the ball guide column is disposed on the lower base side (see examples), and (a).

It may be placed on the bar base side. It is also possible to provide a sub-guide outside the ball guide column (
(See Examples).

The ball guide column is a guide column in which a large number of sliding balls are moored to the outer periphery so as to be freely rotatable.

In this example, it is desirable to provide a positioning bin, a positioning guide, etc. for positioning the lower check plate and the upper check plate with respect to the lower base and the upper base.

Further, it is preferable that a pilot bin for positioning the printed wiring board is provided on the upper check plate or the lower check plate (see Examples).

Furthermore, on the upper check plate side, two upper stripper plates are elastically supported to protect the probe needles and prevent the printed wiring board from lifting when the upper check plate is raised after inspection. desirable.

Further, the probe needle is an inspection needle for contacting a through hole or the like in a conductor pattern of a printed wiring board.

[For production]

In the present invention, with the checker head removed from the lifting device, the lower check plate and the upper check plate are aligned and attached to the lower base and upper base of the checker head. That is,
Perform external setup.

Then, the checker head is laterally attached to the lifting device.

Thereafter, the lifting device is operated to perform a continuity test on the printed wiring board.

At this time, as the elevating device moves up and down, the lower base and the upper base move up and down while being guided by the ball guide column. Further, the lower check plate and the upper check plate move up and down via the lower base and the upper base. Then, the probe needles provided on the upper and lower check plates are brought into contact with the upper and lower sides of the printed wiring board on the stripper plate.

When the probe needle touches the printed wiring board,
Electricity is applied to the printed wiring board from the continuity tester via one of the probe needles. Then, a current flows through the probe needle on the opposite side.

At this time, no current flows through the defective conductive pattern,
A defect is detected. This tests the electrical continuity of the printed wiring board.

Thereafter, the probe needle is separated from the printed wiring board by vertical movement of the lifting device. Then, the printed wiring board that has been inspected is discharged.

The printed wiring board to be inspected next is transferred onto the stripper plate. At this time, the printed wiring board is conveyed while being positioned by the guide bin.

In this way, continuity tests are performed on the printed wiring boards one after another.

[Effects] As described above, according to the present invention, external setup can be performed using a cassette-type checker head.

Therefore, according to the present invention, the check plate can be easily set in a short time. An electrical check device for printed wiring boards can be provided.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An electrical check device for a printed wiring board according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

As shown in FIGS. 1 and 2, the electrical check device of this example includes a lifting device 1, a cassette-type checker head 2 that can be attached and detached laterally to the lifting device 1, and a checker head 2. A stripper plate 31 is arranged at the center of the lift bag W1 and fixed to the lift bag W1. Further, a probe needle 41 connected to a continuity tester 4 is installed in the checker head 2.

The checker head 2 includes a lower base 21 having a lower check plate 210 and an upper base 22 having an upper check plate 220, as shown in FIGS. 2 and 3. Further, a ball guide column 231 is provided between the lower base 21 and the upper base 22 to guide the vertical movement of both.

Further, the upper check plate 220 and the lower check plate 210 each include the probe needle 41.
be planted so that it can move forward and backward.

The stripper plate 31 is connected to the printed wiring board 8
It has a guide pin 311 for positioning, and when the checker head 2 is mounted on the lifting device 1, the upper check plate 220 and the lower check plate 2
10.

By the vertical movement of the lifting device 1, the lower base 21 and the upper base 2 are moved as shown in FIG.
2, the lower check plate 210 and the upper check plate 220 move up and down.

The 10-bundle dollar 41 is configured to be brought into contact with the printed wiring board 8 on the stripper plate 31.

As shown in FIG. 1, the lifting bag W1 is equipped with a hydraulic device (not shown in the figure) that provides vertical movement to a zero-car moving platform 11 and 12 that have an upper moving platform 11 and an upper moving platform 12 that move up and down in opposite directions. connection).

Furthermore, a loading device 51 and a discharging device 52 for the printed wiring board 8 are provided on both sides of the lifting bag W1.

The stripper plate 31, as shown in the figure,
It is fixed to the frame 10 of the lifting device 1 in a manner corresponding to the height position of the loading device 51 and the discharging device 52.

The checker head 2 consists of a lower base 21 and an upper base 22, as shown in FIGS. 2 and 3. The lower base 21 and the amber base 22 are each formed into a convex shape, and the lower check plate 210 and the upper check plate 220 are attached to the protruding opposing surfaces thereof. The lower check plate 210 and the upper check plate 220 are positioned at nine positions by positioning pins 25 protruding from the lower base 21 and upper base 22.

As shown in FIG. 4, the probe needle 41 and the pilot pin 21 for positioning the printed wiring board are implanted in the lower check plate 2]0.

The stripper plate 31 is provided with pin holes 312 and needle holes 3 to 4 through which the probe needles 41 and pilot pins 211 are inserted. Also,
The stripper plate 31 has the guide pin 31
1 are arranged at regular intervals along the conveyance direction of the printed wiring board 8.

The probe needle 41 is implanted in the upper check plate 220 . In addition, the upper check plate 22
As shown in FIGS. 2 and 4, the upper stripper plate 32 is elastically supported on the lower surface of the stripper 0 by guide bolts 322 and springs 323. As shown in FIG. 4, the upper stripper plate 32 is provided with a pin hole 321 and a needle hole 324 through which the guide pin 311 and probe needle 41 of the stripper plate 3 are inserted.

As shown in the fifth section, the probe needle 41 includes a cylindrical case 411 with a bottom, a needle main body 412 fitted into the case 411 so as to be able to move forward and backward, and the needle main body 4
12 elastically supporting the spring 413.

Needle body 412 has a needle head 410 for contacting a printed wiring board. The probe needle 41 is.

It is connected to the continuity tester 4 via a lead wire 414.

Next, as shown in FIG. 2, the ball guide column 231 erected on the lower base 21 has a number of sliding poles 233 moored to its tip so as to be freely rotatable.

Further, the upper base 22 includes the pole guide column 23.
A guide tube 232 for slidably inserting the guide tube 232 is provided.

Further, near the center of the upper base 22, a sub-guide 242 for assisting the pole guide column 231 is provided to protrude downward. 5 for lower base 21
A guide hole 241 is formed into which the sub-guide 242 is slidably inserted.

In addition, in FIG. 2, 26 indicates a knock pin.

Since the electric change device of this example is configured as described above, it exhibits first order effects.

That is, when setting the upper check plate 220 and the lower check plate 210 in accordance with the printed wiring board 8 to be inspected, the checker head 2 is
This state is shown in FIGS. 2 and 3, in which the wafer is taken out in the lateral direction.

Then, the lower check plate 210 and upper check plate 220 attached to the lower base 21 and upper base 22 of the checker head 2 are replaced according to the printed wiring board 8 to be inspected.

At this time, the 1 positioning pin 25 is connected to the lower check plate 2.
10 and the upper check plate 220 to the correct position. Therefore, the lower check plate 210 and the upper check plate 220 can be easily attached to the lower base 21 and the upper base 22 in a short time. That is, it becomes possible to perform external setup quickly.

An upper stripper plate 3 is attached to the upper check plate 220 in accordance with the printed wiring board 8 to be inspected.
Attach 2.

Further, a stripper plate 31 is attached to the frame 10 of the lifting device 1 in accordance with the printed wiring board 8 to be inspected.

Then, as shown in FIGS. 2 and 3, the lower base 21 and the Anova heath 22 are integrally assembled using the pole guide column 231.

With the checker head 2 set in this way, move the checker head 2 to the lifting device 1 as shown in FIG.
Attach it from the side.

Thereafter, the lifting device 1 is moved up and down to perform a continuity test on the printed wiring board 8.

When the lifting device 1 moves up and down.

The lower base 21 and the upper base 22 move up and down. Further, the lower check plate 210 and the upper check plate 220 move up and down via the lower base 21 and the amber base 22. At this time, the pole guide column 23
1 slides smoothly inside the guide cylinder 232 using the sliding pole 233.

This allows the lower check plate 210 and the upper check plate 220 to be aligned with high precision during inspection.

Also, the sub guide 242 allows the lower check plate 2
10 and the upper check plate 220 are further improved in positioning accuracy.

On the other hand, as shown in FIG.
1, the printed wiring board 8 to be inspected is fed onto the stripper plate 31. At this time, as shown in FIG. This prevents the printed wiring board 8 from wobbling laterally.

As shown in FIGS. 2 and 3, the lower check plate 210 and the upper check plate 2 are
20, the probe needle 41 comes into contact with the printed wiring board 8 on the stripper plate 31. in particular.

The tip of the probe needle 41 electrically contacts the entrance of a through hole in a conductive pattern provided on the surface of the printed wiring board 8.

Further, during the above inspection, the printed wiring board 8 is sandwiched between the stripper plate 31 and the upper stripper plate 32 as shown in FIG. Also,
Prior to this, the printed wiring board 8 is positioned using the pilot pin 211 of the lower check plate 210. Further, the probe needle 41 of the upper check plate 220 is connected to the needle hole 32 of the upper stripper plate 32.
Insert 4. In addition, the upper stripper plate 32
The guide pin 311 of the stripper plate 31 is inserted into the pin hole 321 of the stripper plate 31 .

When the probe needle 41 contacts the printed wiring board 8, the needle body 412 compresses the spring 413, as shown in FIG. Then, the needle body 412 is energized via a lead wire 414, as shown in FIG. Thereby, electrical continuity of the printed wiring board 8 is tested.

Thereafter, the lower check plate 210 and the upper check plate 220 are moved away from each other by the lifting device 1, and the probe needle 4 is moved away from the printed wiring board 8.
Let go of 1.

At this time, raise the non-stick bin 26 and support the stripper plate 31 while holding the lower check plate 26.
Land 0. As a result, the probe needle 41 and pilot pin 211 are removed from the printed wiring board 8. Furthermore, since the printed wiring board 8 is placed on the stripper plate 31, the printed wiring board 8 does not become distorted due to "warping" or the like. Therefore, the pilot pin 211 etc. can be pulled out smoothly.

Further, since the stripper plate 32 is elastically supported by the upper check plate 220, when the probe needle 41 is removed from the printed wiring board 8, the printed wiring board 8 is prevented from being lifted up. Moreover, this allows the probe needle 41 to be pulled out smoothly, and the probe needle 41 can be protected.

After the inspection is completed, the printed wiring board 8 is transported to the next process by the discharge device 52, and the printed wiring board 8 to be inspected next is transported onto the stripper plate 31 by the loading device 51.

In this way, continuity tests are performed on the printed wiring boards one after another. According to this example, the main part of the inspection is configured as a cassette-type changer head, so that the inspection can be carried out in a short time.
You can easily set the check plate.

[Brief explanation of drawings]

1 to 5 show an electrical check device for a printed wiring board according to an embodiment, and FIG. 1 is an overall front view thereof, and FIG.
The figure is a partially sectional front view of the checker head, Figure 3 is a side view of the checker head, Figure 4 is an exploded side view of the main part, and Figure 5 is a side view of the checker head.
The figure is a side view of a probe needle, and FIG. 6 is an overall front view of a conventional electrical check device for a printed wiring board. 11. . 20. . 21. 210,. 211,. 22. 220,. 231,. 232,. 242,. 25. 31. lift device. Checker head. Lower base. Lower check plate. pilot pin. upper base. Upper check plate. ball guide column. Guide tube sub guide positioning pin. stripper plate. 3 l 1゜32゜4゜41゜8゜Guide pin. Top stripper plate. Continuity tester. probe needle. printed wiring board.

Claims (1)

[Scope of Claims] A lifting device, a cassette-type checker head that can be attached and detached laterally to the lifting device, and a stripper plate disposed in the center of the checker head and fixed to the lifting device. Also, for the checker head above,
An electrical check device for a printed wiring board comprising a probe needle connected to a continuity tester installed, the checker head comprising a lower base having a lower check plate and an upper base having an upper check plate, Further, a ball guide column is arranged between the lower base and the upper base to guide the vertical movement of both, and the probe needle is installed on the upper check plate and the lower check plate, respectively. The stripper plate has guide pins for positioning the printed wiring board, and when the checker head is attached to the lifting device, there is a space between the upper check plate and the lower check plate. When the lifting device moves up and down, the lower check plate and the upper check plate move up and down via the lower base and the upper base to bring the probe needle into contact with the printed wiring board on the stripper plate. 1. An electrical check device for a printed wiring board, characterized in that: