JPH03230452A - Defective base pin detecting method - Google Patents

Abstract

PURPOSE:To easily detect conducting wires with a camera by detecting the ends of the conducting wires protruded from pin tips with an image processing scanning beam, applying masking at positions backward to the pin side by a preset quantity, and performing binary judgment. CONSTITUTION:A camera 9a is installed on an axis beta line perpendicular to a straight line alpha connecting base pins a, a' to detect conducting wires protruded from the pins a, a'. Conducting wires protruded from bases b, b' are detected by a camera 9b. A scanning beam is run on an image processed by image processors 10a, 10b to find a point where there is no black point, and a mask is formed from a point backward from the line by several wires. The mask can be formed at the tip of the base pins 4, the black portion in the mask is measured, and this area value is judged in binary values. The conducting wires protruded from the tip of the pins 4 can easily be detected by the cameras 9a, 9b two by two.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for detecting a protrusion failure of a cap pin conducting wire in a cap mounting device for an annular fluorescent lamp.

[Conventional technology]

Conventionally, the method of connecting an electrode lead wire and a cap pin for a fluorescent lamp is as shown in Japanese Patent Laid-Open No. 60-39786, in which the lead wire is inserted into the cap pin, and the portion of the lead wire that protrudes from the tip of the cap pin is minutely cut. Cut with a cutter leaving only the dimension Q, push this dimension Q into the inside of the cap pin, leave the lead wire slack within the cap pin, press the side wall of the cap pin 2 with a punch, and remove the lead at the pressed point. It is designed to sandwich the wire. In such a conventional technique, a defect is likely to occur in which the lead wire remains protruding from the tip of the base pin.

[Problem to be solved by the invention]

By the way, visually inspecting the cap pin end surface of annular fluorescent lamps with four conductive wires protruding from the cap pin end surface at the same time and more than 1000 per hour as in the past requires considerable skill and is a harsh process. It was inspection work.

The present invention has been made to improve the reliability of this visual inspection work and to save the labor of the inspector.

[Means to solve the problem]

In order to achieve the above object, in the present invention, a camera is arranged to photograph the tip of the cap pin after the process of attaching the cap pin, and the conductive wire protruding from the tip of the cap pin is detected by the image processing device.

[Effect]

The image processing camera is installed at a position perpendicular to the opposing lines of the four cap pins to take pictures. The two cap pins can be photographed at the same time without being blocked by the other two pins.

〔Example〕

An embodiment of the present invention will be described below.

FIG. 1(a) is a plan view of the annular fluorescent lamp, showing only the base portion in cross section. Further, FIG. 2B is a front view of the base portion of the lamp.

The filament 6 of the annular fluorescent lamp is made by inserting the conductive wire 7 led out from the end face sealing part 8 of the glass bulb 1 into the four hollow pins 4 that stand upright in the resin base 2, and after cutting the protruding conductive wire from the tip part 5. , conduction is achieved by welding or caulking.

The present invention is a method of detecting this protruding conductive line 5 using an image processing camera.

Figure 2 is a side view of the relative position of the camera and the base pin, Figure 3
The figure shows an enlarged plan view taken along the line B--B in FIG.

In both figures, the glass bulb 1 is photographed by cameras 9a and 9b from an angle of 45 degrees, and the processing device 10a.

10b.

At this time, the conductive wire protruding from the cap pin aa' can be easily detected by installing the camera 9a on the axis β line which is perpendicular to the straight line α connecting the cap pin aa'. Further, the conductive wire protruding from the base pin bb' can be detected by installing the camera 9b on the axis α line which is perpendicular to the straight line β connecting bb'. At this time, the cameras 9a and 9b are installed with a correlation of β±aa'α±bb'.

FIG. 4 shows the principle of detection of the protruding conductive line 5 by a camera.

FIG. 4 shows an image that has been binarized by the image processing device, and the hatched areas in the figure are black. The detection method is to run a scanning line from the top of FIG. 4, find a point where there are no black dots, and create a mask 1] from a few lines back from that line. By this method, a mask 11 can be made at the tip of the cap pin 4, and the area of the black part within the mask 11 is measured. Based on this area value, the presence or absence of the protruding conductive line 5 is determined.

FIG. 5 shows a configuration diagram of the device. The image of the cap pin 4 is taken in at the detection timing output from the encoder 21, the image processing device 22 determines whether the product is good or defective, and the programmable controller 23 outputs a select signal.

〔Effect of the invention〕

According to the present invention, the conductive wires protruding from the tip of the annular fluorescent lamp cap pin can be easily and quickly inspected two at a time using an image processing camera.

[Brief explanation of drawings]

FIG. 1(a) is a plan view showing a partial cross section and the overall structure of an annular fluorescent lamp, FIG. 1(b) is a side view of the base of the lamp, and FIG. 2 is a protrusion in an embodiment of the present invention. A side view for explaining the detection method, FIG. 3 is an enlarged view taken along the line B-B in FIG. FIG. 1 is a block diagram showing the configuration of an apparatus for implementing the method of the present invention. 1. Glass bulb, 2. Cap, 4. Cap pin, 5
Protruding portion wiring, 9a, 9b... camera, 10a. 10b... Image processing device, α Gold pin aa' center line, β... Gold pin bb' center line.

Claims (1)

[Claims] 1. After installation, an image processing camera is installed on a line perpendicular to the line connecting the four cap pins facing each other with the ring-shaped fluorescent lamp cap pin mounting device, and the end of the conductive wire protruding from the tip of the pin is detected using an image processing scanning line. A method for detecting a defective pin pin, which comprises detecting a protrusion of a lead wire by masking a portion returned to the pin side by a predetermined amount from the detected position, and performing a binary judgment to detect lead wire protrusion.