JPH0413664Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] This invention relates to a marking mechanism for a printed wiring board inspection device, and more specifically to a marking mechanism for indicating defect positions in a pattern of a printed wiring board.

[Background of the idea]

This type of inspection equipment simultaneously scans the entire surface of multiple printed wiring boards using independent inspection mechanisms, and detects pattern defects by comparing the signals output from each inspection mechanism. The defect position is indicated on the top by a marking mechanism. The marking mechanism is placed on a lifting platform installed on a member that supports and scans the inspection mechanism, and is positioned on the center line of the inspection path. The defect is displayed at the top.

In such a marking mechanism, defects are indicated only on the center line, and defects outside the center line are indicated far from the actual defect position, so it takes time and effort to find defects. For this reason,
Finding the actual defect location must be performed over the entire inspectionable area of the inspection mechanism, centering on the markings, and this must be done for each marking, requiring a considerable amount of labor and time from the operator. The current situation is that we are forced to do so.

[Purpose of invention]

The present invention provides a marking mechanism for a printed wiring board inspection device that allows defects to be found more easily and quickly.

[Summary of the idea]

The marking mechanism of the present invention includes a support member that supports the inspection mechanism and scans the printed wiring board, and includes at least a position on the center line of the inspection path of the mechanism of the inspection unit and a position on both sides of the center line. A marker is arranged on each, and each marker is supported by each lifting platform which is independently held by a support member, so that each marker can be pressed into contact with or separated from the printed wiring board by moving the lifting platform. west,
Each platform is engaged with each independently rotatable arm on the support member such that rotation of the arm causes the movement of the platform, and each arm is mounted on the support member. It is characterized in that the arm is engaged with independent electromagnetic solenoids to perform the above-mentioned operations.

The marking mechanism of the present invention operates each electromagnetic solenoid according to the defects detected by the inspection mechanism, thereby identifying defects on the center line of the inspection path, defects on one side of the center line, and defects on the center line. Since markings can be made to distinguish between defects on the opposite side and markings can be made at positions closer to the defect, defects can be found extremely easily and quickly. especially,
Defects located on both sides of the center line of the inspection path can be found extremely easily because the area that must be searched is halved compared to conventional methods.

In the present invention, the marker on the center line of the inspection path and the markers on both sides of the center line are marked with different colors, so that defects can be found more easily. I can do it. Furthermore, each lifting platform may be held on a detachable platform with respect to the support member, thereby making it possible to easily replace the marker outside the inspection device.

Examples of the marking mechanism of the present invention are as follows:
This will be explained with reference to the attached drawings.

[Example of idea]

In the drawing, reference numeral 11 supports the inspection mechanism in the inspection device and indicates the rectangular coordinate axes X, Y and Z.
The member to be moved is shown. 3 markers 1
2a, 12b, 12c and means for pressing each marker onto the printed wiring board 10 and separating them from the printed wiring board 10 are installed on this support member 11, and can move together with the support member 11 in the X, Y, and Z axis directions.

Each marker is, for example, a felt pen, is L-shaped, and has an independent holder. Each marker is held on an independent mounting base 13a, 13b, 13c. These mounting bases are attached to rods 14a, 14b, 1
4c and connectors 15a, 15b, and 15c, each constitutes a lifting platform, and the support member 11
It is held on a stand 16 supported by. Each lifting platform is constructed by having a rod inserted into a hole in the platform 16, a mounting base attached to the lower end of the rod, and a connector attached to the upper end of the rod.
2a, 12b, and 12c can be independently approached to or separated from the printed wiring board 10. Coil springs 17a, 17b, 1
7c is arranged between each connector and each platform, and pushes up the entire elevator platform. Rod 19a, 19b,
19c is inserted into the coil spring to prevent the coil spring from falling. This rod is suspended in a hole in the base 16 and has its upper end connected to each connector, but its lower end is not connected to the mount.

The marker is separated from the printed wiring board by a coil spring pushing up the elevator platform, and is pressed against the printed wiring board by pushing down the elevator platform by an arm located at the top of each elevator platform. In the drawing, the arms for each lifting platform are marked 21a, 21b,
21c, its shaft 23 is held in a bearing on another platform 22, and its ends are extended to the upper surfaces of the connecting members 15a, 15b, and 15c of the lifting platform, respectively. roller 24
a, 24b, and 24c, for example consisting of rolling bearings, are rotatably attached to the extended ends of each arm. The arm is engaged with the lifting platform by bringing the roller into contact with the connector. The electromagnetic solenoids 25a, 25b, and 25c slide a plunger inside the coil each time the coil is excited, and the electromagnetic solenoids 25a, 25b, and 25c slide a plunger inside the coil each time the coil is excited.
It is installed in The plunger of each solenoid is brought into contact with each arm, and when each coil is energized, each arm rotates and the marker 1
2 can be lowered together with the lifting platform.

This marking mechanism allows the central marker 12a to scan the inspection path of the inspection mechanism, that is, the inspection mechanism, so that the inspection mechanism can place the inspection area of the detector on the center line of the locus drawn on the printed wiring board, and The markers 12b and 12c on both sides are arranged so as to be located on both sides of the front-rear center line, for example, at the center of both sides of the test path with the center line in between.

This marking mechanism is moved by the support member 11 together with the inspection mechanism to scan the printed wiring board, and when the inspection mechanism detects a defect in the pattern on the center line of the inspection path, the solenoid 25
The coil a is momentarily excited by a signal from the inspection mechanism, and the lifting platform is lowered by the arm 21a and returned by the spring 17a, and at this time, the marker 12a that has been moved to the defect is marked on the defect. will be done. Furthermore, when the inspection mechanism detects a defect on one side of the inspection path with the center line in the middle, the marker 12
b makes a marking, and when a defect on the opposite side of the center line is detected, marker 12c can make a marking.

Now, the inspection area of the inspection mechanism is 20 mm on each side of the center line of the inspection path, and the markers 12a, 12b, and 12c are 10 mm from the center line.
Let's make a marking at the location. Marker 12
Marking b or 12c indicates that a defect exists within a 10 mm radius around the marking. In the conventional marking mechanism, defects exist within a circle with a radius of 10 mm centered on the marking. The marking mechanism according to the present invention can detect defects that are far from the center line of the inspection path by searching in half the area of conventional methods. Moreover, since defects on the center line are detected separately by the marker 12a, there is no need to search including the center line as in the conventional method, so defects can be discovered more quickly and easily.

In this marking mechanism, markers can be exchanged very easily at the start of an inspection or during an inspection. For this purpose, the platform 16 that holds the marker lifting platform has a guide 27 on one side.
A rail 28 having a channel cross section that engages with the guide 27 is attached to the support member 11, so that the marker and the lifting platform can be attached to and removed from the support member 11, so that the marker can be easily replaced. I have made it possible for you to do what you want. Note that the table 14 is fixed so that the ball resting on the rail 28 and held by a leaf spring or the like is fixed on the guide 31.
This is done by fitting into a hole in the

[Effect of idea]

As described above, the marking mechanism of the present invention can easily and easily find defects on printed wiring boards, so it not only improves work efficiency but also reduces the labor burden on workers. can.

[Brief explanation of drawings]

The drawings show one embodiment of the marking mechanism of the present invention, in which FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a sectional view taken along the line shown in FIG. 2. 10...Printed wiring board, 11...Supporting member, 12
a, 12b, 12c... marker, 13a, 13
b, 13c to 19a, 19b, 19c... Lifting platform, 21a, 21b, 21c... Arm, 25
a, 25b, 25c...electromagnetic solenoid.

Claims (1)

[Scope of utility model registration request] It includes a support member that supports the inspection mechanism and scans the printed wiring board, and has markers arranged at least at a position on the center line of the inspection path of the inspection mechanism and at each position on both sides of the center line, Each marker is supported by each lifting platform that is independently held by a support member, so that each marker can be pressed against or separated from the printed wiring board by moving the lifting platform, and each lifting platform is supported. an independent electromagnetic solenoid installed on the support member for each arm, engaged with each of the independently rotatable arms on the member so as to cause the movement of the lifting platform by rotation of the arm; 1. A marking unit for a printed wiring board inspection apparatus, characterized in that said rotation of said arm is achieved by engaging said marking unit with said marking unit.