JPH0810247B2 - Circuit board inspection equipment - Google Patents

Description

Description: [Industrial field of use] The present invention relates to a circuit board inspection apparatus.

[Prior Art] In the conventional inspection of a circuit board, an inspection head is provided on a transfer path of a circuit board to be inspected, and a circuit board placed on a carrier passing through the transfer path is placed under the inspection head. When passing through, the inspection is performed by temporarily stopping the transportation, lowering the inspection head from above, and bringing the probe into contact with the pattern surface of the upper surface.

[Problems to be Solved] In the conventional inspection apparatus described above, the equipment is relatively simple, but the probe is brought into contact with the circuit board placed on the carrier. Therefore, a certain amount of margin is required, so positioning is inaccurate and it is difficult to perform a highly accurate inspection of the circuit board. Also, the inspection time is long and the inspection efficiency is poor.

Furthermore, when inspecting different types of circuit boards,
An inspection head having a probe capable of abutting on different pattern surfaces must be used, but in the above-mentioned conventional apparatus, the inspection head must be interrupted and the inspection head replaced.
There are problems such as complicated labor and extra time.

Therefore, an object of the present invention is to move a conveyed circuit board to a dedicated inspection device, accurately position it, and then inspect it to enable a highly accurate inspection, and a circuit board from the conveyance device to the inspection device. A circuit board inspection device capable of exchanging wastelessly, shortening the inspection time, and easily changing the inspection head according to the change of the type of the circuit board to eliminate extra time. To provide.

[Means for Solving the Problems] A first feature of the present invention is to provide a carrying device for carrying a circuit board, and the carrying device is provided at one side portion of the carrying device and abuts on a pattern surface of the circuit board. The manipulator includes an inspection device provided with an inspection head having a probe, and a manipulator provided at an intermediate position between the transfer device and the inspection device for exchanging the circuit board. The manipulator is rotationally driven by a rotational drive means. And a pair of chucks provided at both ends of the arm, and the arm is driven up and down by the lifting means. The arm has a phase of 180 degrees with respect to the rotation axis of the rotation driving means. The pair of chucks are extended symmetrically with respect to each other, the pair of chucks are symmetrically positioned with respect to the rotation axis, and transfer of the circuit board for inspection from the transfer position to the inspection device. The operation and the movement of the inspected circuit board from the inspection device to the transfer device are performed in parallel.

A second feature of the present invention resides in that the inspection apparatus is provided with a plurality of inspection heads that can be moved and switched according to the type of the circuit board.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a transfer device 2 is provided on the table 1. The transfer device 2 has a conveyor 42 for transferring a carrier 3 on which a circuit board P is placed from left to right.
A conveyor 4 is provided from left to right for carrying the carrier 3 on which the circuit board P is placed. The conveyor 4 is controlled to move or stop by a controller (not shown).

On the left side (upward in FIG. 1) of the transport device 2 in the traveling direction, the circuit board P is mounted on the support base 1a formed integrally with the table 1.
The inspection device 5 is attached. The inspection device 5 is capable of inspecting a double-sided circuit board having pattern surfaces on both sides. A fixed table 6 is provided on the support base 1a, rails 6a, 6a are laid horizontally on the fixed table 6, and a movable table 7 is provided along the rails so that the movable table 7 can travel freely. The inspection head 8 is disposed on the moving table 7, and is provided with probes (not shown) that come into contact with respective pattern surfaces according to the type of the circuit board P.
It is composed of three inspection heads 81, 82, 83.

As shown in FIG. 2, a column 11 holding the inspection device 5 is erected on the moving table 7, and a top plate 12 is fixed to the upper end of this column. Moving table 7 and point plate
A lower mounting plate 14 is fixed to a guide column 13 which is erected between the lower mounting plate 12 and the guide column 13.
It is attached to the upper surface of 14. The lower mounting plate 14 is stably supported in a correct posture by a column 7b provided upright on the moving table 7. The inspection head 8 constitutes a lower inspection head for inspecting the pattern surface of the lower surface of the circuit board, and an upper inspection head 18 for inspecting the upper pattern surface is provided on the upper portion of this inspection head. It is provided. That is, an upper mounting plate 15 is provided so as to be able to move up and down along the guide column 13, and an upper portion having the same structure as the lower inspection head 8 and having three inspection heads (not shown) is provided on the lower surface of the upper mounting plate. The inspection head 18 of FIG. On the upper surface of the upper mounting plate 15, the output portion 16a of the cylinder 16 provided on the top plate 12 is connected,
The upper inspection head 18 can be lowered and raised by expanding and contracting the cylinder 16.

The inspection heads 8 and 18 have a lower plate 8a and a receiving plate 8b, respectively.
Also, the upper plate 18a and the contact plate 18b are configured in two pieces, and the probes (not shown) necessary for inspecting the circuit board P are planted in the lower plate 8a and the upper plate 18a, respectively. Backing plate 8b, backing plate 1
8b are elastically provided to the lower plate 8a and the upper plate 18a, respectively, and the circuit board P is supplied to the upper surface of the receiving plate 8a.

3 inspection heads by moving the inspection heads 8 and 18 horizontally
As a device for switching the positions of 81, 82, and 83, a motor 9 is fixed to the fixed table 6, and a lead screw 10 that is rotationally driven by this motor is horizontally provided. A nut 7a screwed with the lead screw 10 is provided on the lower surface of the moving table 7, and the moving table 7 is configured to move via this nut by the rotation of the lead screw.

As shown in FIGS. 1 and 2, a manipulator 20 for transferring the circuit board P is provided at an intermediate position between the transfer device 2 and the inspection device 5. Therefore, the structure of the manipulator 20 will be described.
The rotary shaft 21a of the step motor is provided so as to be able to move forward and backward in addition to being rotated by the motor, and the rotary plate 22 is provided so as to rotate integrally with the rotary shaft 21a. An arm 23 is fixed to the tip of the rotating shaft 21a,
This arm extends on both sides with a phase relationship of 180 degrees with respect to this axis of rotation. Between the rotary plate 22 and the arm 23, two cylinders 24, 24 of lifting means are attached at symmetrical positions with respect to the rotary shaft 21a. A pair of air chucks 2 for transferring and receiving the circuit board P are provided at both ends of the arm 23.
5, 26 are provided, and these two checks are located symmetrically with respect to the rotating shaft 21a.

On the opposite side of the inspection device 5, there is provided a defective product removing device 27 for removing the defective circuit board selected by the inspection device.

 Next, the operation of the present invention will be described.

As shown in FIG. 1, when the arm 23 of the manipulator 20 is positioned parallel to the traveling direction of the conveyor 4, the carrier 3 on which a plurality of circuit boards P are mounted is
The printed circuit board P is placed on the inspection head 81 located at the inspection position by moving from left to right. Once the conveyor 4 is stopped at a predetermined position, the arm 23
Is rotated 90 degrees counterclockwise by the step motor 21 and 1
When the pair of chucks 25 and 26 face the inspection head 81 and the circuit board P on the carrier 3, respectively, the cylinder 24 retracts and the arm 23 descends. Therefore, one chuck 26 attracts the circuit board P on the carrier 3, and the other chuck 25 attracts the inspected circuit board P from the inspection head 81. The cylinder 24 is extended, the arm 23 is rotated 180 degrees this time by the operation of the step motor 21, the chuck 25 is located on the carrier 3, and the chuck 26 is located on the inspection head 81. The circuit board P is released. As a result, the inspected circuit board P is returned onto the carrier 3, and the uninspected circuit board P is supplied onto the inspection head 81. When the arm 23 returns to the position parallel to the original transport direction again, the conveyor 4 of the transport device 2 moves by a predetermined amount to prepare for the next transfer of the circuit board P. Also inspection device 5
Then, the inspection heads 8 and 18 inspect the circuit board P.

After this inspection, the arm 23
Is rotated and the chucks 25 and 26 pick up the circuit board P, respectively, and the same operation is repeated in order, and the inspection of the circuit board P is continued. In this way, the inspection circuit board P is moved (transferred) from the carrier 3 of the transfer device 2 to the inspection head 81 of the inspection device 5, and the inspected circuit board is transferred or transferred from this inspection device to this transfer device. And are done in parallel.

If different types of circuit boards are supplied, the motor 9
Is driven to rotate the lead screw 10 to move the moving table 7 by a predetermined distance, and another inspection head 82 provided with a probe corresponding to a new circuit board is moved to the inspection position and switched. When another type of circuit board is supplied, another inspection head 83 may be moved to the inspection position and switched.

As a result of the inspection, the circuit board determined to be defective is picked up from the carrier 3 by the defective product removing device 27 and removed in a recovery box (not shown).

[Effect] Since the present invention is provided with a dedicated inspection device, accurate positioning is possible and highly accurate inspection is possible. The transfer of the circuit board from the transfer device to the inspection device and the transfer of the circuit board from the inspection device to the transfer device are performed in parallel by the pair of chucks at both ends of the rotation of the arm. Can be shortened and inspection efficiency can be improved. Further, since a plurality of inspection heads are provided corresponding to the type of circuit board, the inspection heads can be switched very easily as needed, and extra time can be eliminated.

[Brief description of drawings]

 FIG. 1 is a plan view and FIG. 2 is a side view. 2 ... Conveyor device, 5 ... Inspection device, 8,18 ... Inspection head, 81,82,83 ... Inspection head, 20 ... Manipulator, 21 ... Rotation drive means (step motor), 21a ... Rotation Axis, 23 ... Arm, 24 ... Lifting means (cylinder), 25, 26 ... Chuck, P ... Circuit board.

Claims (2)

[Claims] 1. A transport device for transporting a circuit board, and an inspection device provided on one side of the transport device, the test head having a probe for contacting a pattern surface of the circuit board. It includes a manipulator which is provided at an intermediate position between the transfer device and the inspection device and which transfers and receives the circuit board, the manipulator being driven to rotate by a rotation drive means and to be moved up and down by an elevating means, and The arm comprises a pair of chucks provided at both ends of the arm, and the arm extends to both sides with a phase relationship of 180 degrees with respect to the rotation axis of the rotation driving means. The chuck is positioned symmetrically with respect to the rotation axis, and moves the inspection circuit board from the transfer position to the inspection device and from the inspection device to the transfer device. The circuit board inspection device is characterized in that it moves the inspected circuit board to the circuit board in parallel. 2. The inspection device for a circuit board according to claim 1, wherein the inspection device is provided with a plurality of the inspection heads that can be moved and switched according to the type of the circuit substrate.