JP3329966B2 - Inspection device for bar with head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inspecting a bar with a head such as a PGA pin or a screw of a pin grid array substrate (PGA substrate).

[0002]

2. Description of the Related Art Conventionally, a screw conveying device has been known, for example, from Japanese Utility Model Laid-Open Publication No. 6-39828. However, in the above-mentioned conventional example, there is no inspection apparatus that sorts screws into an appropriate amount and transports the screws at a high speed and sorts them into non-defective products and defective products. Was.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a non-defective / defective product at high speed while conveying a headed bar. It is an object of the present invention to provide a headed bar inspection device capable of inspecting a bar.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art and achieve the object of the present invention, the headed bar inspection apparatus of the present invention is inclined in a direction intersecting with the conveying direction. Vibration feeder 5 having slit-shaped guide 1
The shaft portion 4 of the headed bar 3 having the head 2 at the upper end is inserted into the guide portion 1 and the head 2 of the headed bar 3 is placed on the upper opening edge of the guide 1 and conveyed. An image pickup device 6 for imaging the headed bar 3 conveyed by the vibrating feeder 5, and a headed bar processed by processing an image taken by the imaging device 6. Inspection means 7 for judging non-defective / defective products of No. 3 and screening means 8 for selecting non-defective / defective products of the headed bar 3 supplied from the vibration feeder 5 based on the judgment result of the inspection means 7 Provision , Guy
Of the lower edge of the upper edge of the upper edge of the door part 1 in the above-mentioned inclined state.
It is characterized by being formed on the sharp edge portion 20 .

Further, the guide 1 provided on the vibration feeder 5
The vertical width of the end of the rod 3 is set to a width that allows the head 2 of the headed bar 3 and the tip of the shaft 4 to protrude. It is also preferable that the configuration is such that the distal end portions of the portion 2 and the shaft portion 4 are imaged.

[0006]

The shaft 4 of the headed bar 3 is inserted into the slit-shaped guide 1 of the vibrating feeder 5 and the head 2 is placed on the opening edge of the upper end of the guide 1. Material 3 is transferred. In this case, since the guide portion 1 is inclined in a direction intersecting with the conveying direction of the headed bar 3, the shaft 4 of the headed bar 3 vibrates to cause one inner surface of the slit-shaped guide 1 to move. The headed bar 3 can be transported at high speed by rolling. The headed bar 3 conveyed at high speed in the guide portion 1 is imaged by the imaging device 6 at the end of the guide portion 1, and the image captured by the imaging device 6 is subjected to image processing by the inspection means 7 to determine whether it is a non-defective product. It is determined whether the product is defective or not and the headed bar 3 supplied from the end of the vibration feeder 5 is sorted by the sorting means 8 based on the determination result of the inspection means 7.

Further, the guide unit 1 provided on the vibration feeder 5
The vertical width of the end of the rod 3 is set to a width that allows the head 2 of the headed bar 3 and the tip of the shaft 4 to protrude. The imaging device 6 can determine the overall length, the length of the head, and the like of the bar member 3 with the head, because the imaging device 6 is configured to image the distal end portion of the portion 2 and the shaft portion 4.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a schematic perspective view of the entire apparatus. In the figure, reference numeral 9 denotes a base, and a vibration feeder 5 is provided at the center.
A rotating roller 11 is provided at a rising portion 10 at the rear end, and a drum case 12 is rotatably mounted and supported on the rotating roller 11.
To rotate the pin grid array substrate (PGA)
A drum case 12 in which a bar material 3 with a head, such as a PGA pin or screws, of a substrate (substrate) is placed is rotated.

The vibrating feeder 5 is provided with a slit-shaped guide portion 1 at an upper portion. In the embodiment shown in the drawings, as shown in FIGS. 2 and 3, the chute member 15 is formed by fixing the plate members 13 and 14 together. Chute member 1
A groove is formed between the plate members 13 and 14 constituting the groove 5 (a groove is formed on the side of the plate member 13 in the illustrated embodiment), and this is used as a slit-shaped guide portion 1. Slit-shaped guide part 1
Is a shaft member 4 of a headed bar 3 having a head 2 at an upper end thereof, and the head 2 of the headed bar 3 is placed on an upper opening edge of the guide portion 1. The headed bar 3 is transported along the guide 1 by vibration.

Receiving trays 16 and 17 are provided at the start end of the chute member 15 at the upper ends on both sides. The one plate member 13 is divided into a portion having the tray portion 16 and a front side thereof, and a gap 18 is formed between the two. The front ends of the two plate members 13 and 14 (that is, the guide portions 15
At the end of the plate members 13, 14 are formed with projecting pieces 13a, 14a having a narrow upper and lower width.
In the portions a and 14a, the slit-shaped guide portion 1 is opened upward and downward. Chute member 1 having the above configuration
5 is inclined in a direction intersecting with the transport direction of the headed bar 3 as shown in FIGS. 3 (a) and 3 (b). In the embodiment, it is inclined so that the angle α in FIG. is there.
Here, the upper end surface portion of the other plate member 14 (that is, the plate member 14 located below the inclined chute member 15) is cut obliquely, and the plate member 14 constituting the upper end edge of the guide portion 1 is cut.
The upper end corner on the guide portion 1 side is an acute edge portion 20. The angle β in FIG. 3B is set to 30 °.

The starting end of the chute member 15 is inserted into the drum case 12 through the front opening 21 of the drum case 12. In this case, the tray portions 16 and 17 and the gap 18
Are set in the drum case 12.
An image pickup device 6 (TV) is provided beside the end of the chute member 15.
Camera) is located. For example, the imaging device 6 is configured to be capable of inspecting a maximum of 20 bars 3 with heads by releasing the shutter 36 times per second, for example, and moving the end of the chute member 15 by the imaging device 6. Stick material 3
The head 2 and the tip of the shaft 4 can be imaged. Therefore, the vertical width of the end portion of the guide portion 1 provided on the vibration feeder 5 (that is, the vertical width of the protruding pieces 13a and 14a) is the head 2 of the headed bar 3 to be transported and inspected.
And the width is set so that the tip of the shaft 4 can be protruded.

The image of the headed bar 3 taken by the image pickup device 6 is processed by the inspection means 7 to determine whether the headed bar 3 is good or defective. Here, the outline of the algorithm by the inspection means 7 will be described. In the image processing, the end of the guide unit 1 is imaged by the imaging device 6 and the grayscale image captured by the imaging device 6 is used as shown in FIG.
Is extracted, and a non-defective / defective product of the headed bar 3 is determined based on the edge image. Here, the pixels of the edge image correspond to the addresses of the frame memory, and the difference between the two addresses is related as the length in the edge image. Further, the position of the imaging device 6 is determined so that the vertical direction of the edge image is the moving direction of the headed bar 3 (that is, the direction parallel to the upper edge of the guide portion 1). Then, first to fourth inspection areas including scanning lines and windows are set in the vertical and horizontal directions of the determined position of the edge image, and the total length of the headed bar 3 and the length of the head 2 are obtained. Specifically, it is parallel to the moving direction of the headed bar 3 that moves the protruding pieces 13a, 14a, and is slightly shifted to the head 2 side from the tip of the shaft portion 4 of the non-defective headed bar 3. Bar with head 3 in position
Scan line for exploring the shaft 4 of the first inspection area A
And a position slightly orthogonal to the first inspection area A and slightly before the top end of the guide portion 1 (the upper end in the edge screen) (a position slightly lower than the upper end of the guide portion 1 in the edge screen). A scanning line for exploring the tip of the shaft portion 4 is set as a second inspection region B, and a window for examining the upper end edge of the tip of the guide portion 1 is set as a third inspection region C. A window for inspecting the head 2 in an area including an extension of the scan line of the second inspection area B is set as a fourth inspection area D.

First, the first inspection area A is searched to determine the presence or absence of the headed bar 3 (here, when the shaft 4 of the headed bar 3 is not detected in the first inspection area A). Indicates that there is no work as an error, that is, there is no headed bar 3). Next, the second scanning area B is searched following the search of the first scanning area A, and the address of the tip of the shaft portion 4 of the headed bar 3 is obtained. Further, the third scanning area C is searched to find the address of the upper end opening edge of the guide section 1 (that is, the upper surface of the vibration feeder 5). Further, the fourth scanning area D is searched following the search of the second scanning area B, and the headed bar 3 is searched.
The address of the head 2 is obtained. 5 is the bar 3 with the head
Is the address of the tip of the shaft portion 4, and b is the address of the head 2 of the headed bar 3. Then, the total length of the headed bar 3 is obtained by (address of the head 2) − (address of the tip of the shaft portion 4) = (total length of the bar 3 with the head).
The head length is obtained by (address of the head 2) − (address of the upper end edge of the tip of the guide portion 1) = (length of the head 2).
Based on this, the quality of the inspected headed bar 3 is determined to be good or defective, and it is determined whether or not another type is mixed.

At a position below the end of the chute member 15, there is provided a selection means 8 for selecting non-defective / defective products of the headed bar 3 supplied from the end of the guide portion 1 of the chute member 15. It is arranged. The sorting means 8 includes the guide section 1
Hopper 22a that receives the rod 3 with the head falling from the end of the
A moving hopper 22 for receiving the headed bar 3 falling from the hopper 22a; a cylinder device 23 for moving the moving hopper 22; a non-defective product box 24 located below the moving hopper 22; The imaging device 6 takes an image of the headed bar 3 conveyed by the vibration feeder 5, and the inspection means 7 processes the image taken by the imaging device 6 to process the headed bar 3. Defective products are determined, and the cylinder device 23 is driven based on the determination result of the inspection means 7 to sort and supply the headed bar 3 to the good product box 24 or the defective product box 25. Here, in the embodiment, the moving hopper 22 is normally used.
Is located above the good product box 24,
When the image processing of the headed bar 3 captured by the imaging device 6 is performed by the inspection means 7 and it is determined that the product is defective, the cylinder device 23 is driven to move the lower end opening of the movable hopper 22 to the defective product box 25. A plurality of headed bars 3 including the defective product as a lump,
(The defective product can be dropped into the defective product box 25 without errors by dropping as a lump as described above.) After a certain period of time, the cylinder device 23 is driven again to move the movable hopper again. 2
The lower end opening 2 is located above the non-defective product box 24, and the headed bar 3 that is a non-defective product falling from the end of the guide unit 1 is dropped into the non-defective product box 24.

The inspection of non-defective / defective products of the headed bar 3 is performed by using the apparatus having the above configuration. The inspection of non-defective / defective products is performed as follows. That is, by rotating the drum case 12, the headed bar 3 placed in the drum case 12 is dropped on the trays 16 and 17 at the start end of the chute member 15. Here, the drum case 12 is arranged so as to be inclined so that the vibration feeder 5 side is higher, and a plurality of plates 12 a are provided on the bottom surface of the drum case 12 opposite to the vibration feeder 5 side. The headed bar 3 put in the box gathers at the bottom because the drum case 12 is inclined, and rises upward on the plate 12a by the rotation of the drum case 12, and when it comes to the top, it naturally falls and starts at the start end of the chute member 15. Saucer 1
It falls to 6,17.

The chute members 15 that have fallen into the trays 16 and 17 are sequentially aligned in the direction of the slit-shaped guide 1 by the inclination of the trays 16 and 17 and the vibration of the vibrating feeder 5.
The shaft part 4 enters the slit-shaped guide part 1 and moves the guide part 1 from the start end to the end while the head 2 is placed on the upper edge of the guide 1. In this case, if the shaft portion 4 does not enter the guide portion 1 in a normal posture, or if the head portion 2 is not properly placed on the edge of the upper end opening of the guide portion 1, the gap 18 It is dropped and collected. In addition, the extra headed bar 3 on the plates 16 and 17 also falls from the gap 18 into the drum case 12 and is collected. As a result, the guide portion 1 is smoothly transferred without the headed bar 3 being clogged.

On the other hand, the headed bar member 3 in which the shaft portion 4 normally enters the guide portion 1 and the head portion 2 is properly placed on the upper edge of the upper end of the guide portion 1, vibrates to form the gap 18. When passing, since the chute member 15 is inclined in a direction intersecting the conveying direction of the headed bar 3, the headed bar 3
Since the shaft portion 4 hits the inner surface side of one of the plate members 14 and the head 2 is placed on the edge of the upper edge of the plate member 14 in a state inclined with respect to the transport direction, It will be transported smoothly without doing. By the way, if the chute member 15 is inclined in a direction intersecting the conveying direction of the headed bar 3, the shaft portion 4 moves on the inner surface of the plate 14 by vibrating and vibrating on the inner surface of the plate 14. As a result, the headed bar 3 can be transported quickly by being aligned.
In this case, the upper end edge on the inner surface side of one of the plate members 14 is defined as the edge portion 20, so that the lower surface of the head 2 is supported by the edge portion 20 by line contact, and this line contact portion is 2 is to be transported so that it slips, and a bar with a head 3
Is faster.

In this way, the headed bar 3 is transported at high speed while being guided by the guide unit 1 by the vibration of the vibrating feeder 5. At the end of the guide unit 1, an image is taken by the image pickup device 6 for inspection. (In this case, the imaging device 6
The shutter is released 36 times per second, thereby inspecting a maximum of 20 bars 3 with heads.) The imaging by the imaging device 6 is image-processed by the inspection means 7 to determine whether the product is good or defective. A signal is sent to the cylinder device 23 of the sorting means 8 based on the determination result, and the cylinder device 23 is controlled.
The headed bar 3 supplied from the end of the vibrating feeder 5 is sorted so that a good product is supplied to a good product box 24 and a defective product is supplied to a defective product box 25. FIG. 6 shows a flowchart of the algorithm. Based on this processing procedure, the non-defective / defective products of the headed bar 3 transferred through the guide unit 1 by the vibration of the vibrating feeder 5 are selected and selected. .

[0019]

According to the first aspect of the present invention, as described above, the upper end of the vibrating feeder having the slit-shaped guide section inclined in the direction intersecting the transport direction is provided in the guide section. This is a device that feeds a shaft with a headed bar having a head into it and transports it with the head of the headed bar placed on the upper opening edge of the guide. The headed bar can be aligned and transported at a high speed by the slit-shaped guide portion, and further, an imaging device for imaging the headed bar conveyed by the vibration feeder, and an image captured by the imaging device. Inspection means for processing to determine non-defective / defective headed rods, and selection means for selecting non-defective / defective headed rods supplied from the vibration feeder based on the judgment result of the inspection means Is provided In, in which it is possible to perform good and judgment of defective headed rod for transferring at a high speed as described above, in the automatic high-speed sorting. Moreover, the guide section
The lower corner of the upper opening edge in the above inclined state is sharpened.
The lower part of the head of the bar with the head is
The edge is supported by line contact, and this line
Transfer the bar with head so that the head slides on the contact part
And the speed of the transfer of the headed bar can be increased.
It can be.

Further, in the invention according to claim 2 of the present invention, the vertical width of the end portion of the guide portion provided on the vibrating feeder is made to protrude from the head of the headed bar and the tip of the shaft. In addition to the effect of claim 1, the imaging device is configured to image the head of the bar with the head and the tip of the shaft at the end of the guide portion. In order to find the length of the head of the bar and the total length of the bar with a head,
Defective products can be determined, and it is easy to determine when other products are mixed.

[Brief description of the drawings]

FIG. 1 is a partially broken whole perspective view of an apparatus of the present invention.

FIG. 2 is a perspective view of the above chute member.

3A is a sectional view taken along line XX of FIG. 2, and FIG.
FIG. 3 is a sectional view taken along line YY of FIG. 2.

FIG. 4 is an explanatory diagram showing an outline of an image processing algorithm.

FIG. 5 is an explanatory diagram showing a tip address and a head address of a bar with a head in image processing.

FIG. 6 is a flowchart of the algorithm of the above.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Guide part 2 Head 3 Bar with head 4 Shaft 5 Vibration feeder 6 Imaging device 7 Inspection means 8 Sorting means 20 Edge part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B07C 5/00-5/38 B65G 47/14 101 B65G 27/04

Claims (2)

(57) [Claims] 1. A vibrating feeder having a slit-shaped guide section inclined in a direction intersecting with the conveying direction, wherein a shaft section of a headed bar having a head at an upper end is inserted into the guide section and an upper end of the guide section. A device for inspecting a headed bar to be transported with the head of the headed bar placed on the opening edge,
An imaging device that images the headed bar conveyed by the vibrating feeder, an inspection unit that processes an image captured by the imaging device to determine a non-defective / defective product of the headed bar, and a determination result of the inspection unit. A sorting unit for sorting non-defective / defective headed bar materials supplied from the vibrating feeder on the basis of the lower edge of the upper end opening edge of the guide portion in the above-mentioned inclined state.
An inspection device for a bar with a head, wherein a corner portion is formed at an acute edge portion . 2. A vertical width of an end portion of a guide portion provided on a vibrating feeder is set to a width that allows a head portion of a headed bar and a tip portion of a shaft portion to protrude, and an imaging device is provided at an end portion of the guide portion. The headed bar inspection device according to claim 1, wherein the headed bar and the tip of the shaft are imaged.