JPH0788442A - Visual inspection device for work - Google Patents

Abstract

PURPOSE:To provide such a visual inspection device for a work that visual inspection time per a work is shortened and the device is simplified. CONSTITUTION:A segmenting machine 3 for parts is provided which allows electronic parts e.g. a capacitor C to fall a piece by a piece in the prescribed direction. CCD cameras 4-7 are arranged so as to oppose to the side of the falling capacitor C. The side of the capacitor C falling in the prescribed direction from the segmenting machine 3 for parts is shot by the CCD cameras. Therefore such trouble is not caused that the capacitor C is rotated to perform image pickup. Further distribution is performed according to the result of decision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an appearance inspection apparatus for inspecting the appearance of a work to be inspected such as an electronic component by image processing.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional visual inspection apparatus of this type. In the figure, 51a to 51d are four CCD cameras with illuminators, 52 is an image determination device, 53 is a component conveying path, C is a rectangular electronic component to be inspected, for example, a flat quadrangular prism having electrodes at both ends. It is a capacitor.

The parts conveying path 53 is an improvement of the parts feeder conveying rail. It vibrates the capacitor C to convey it in a predetermined direction along the rail, and at the same time, the capacitor C is provided by an oblique projection provided in the middle of the rail. The orientation can be rotated 90 degrees around the transport direction at a predetermined position. The four CCD cameras 51a to 51d are arranged to face the upper surface of the condenser C before and after the rotation,
Each surface is imaged as it passes through the inspection field of view.

When the appearances of the four surfaces (C1 to C4) of the capacitor C excluding both end surfaces are inspected by the above-mentioned apparatus, first, the surface C1 of the capacitor C on the parts conveying path 53 is changed to the first C.
The image is taken by the CD camera 51a, then the surface C2 of the condenser C after being rotated by 90 degrees is taken by the second CCD camera 51b,
Similarly, the surfaces C3 and C4 of the rotated condenser C are sequentially imaged by the third and fourth CCD cameras 51c and 51d. Then, the image data obtained through each of the cameras 51a to 51d is compared with the reference data (standard pattern) to determine the appearance quality of each surface C1 to C4 of the capacitor C. After the inspection is completed, the capacitors C on the component transport path 53 are sorted according to their quality.

[0005]

However, in the above-described conventional appearance inspection apparatus, when inspecting the four surfaces of the capacitor C to be inspected, it is necessary to rotate the capacitor C by 90 degrees for each image pickup. It takes a long time to inspect the external appearance of the parts, and also requires a mechanism for accurately rotating the capacitor C by 90 degrees.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an appearance inspection apparatus for electronic parts, which can shorten the appearance inspection time per work piece and can simplify the apparatus. It is in.

[0007]

In order to achieve the above object, the invention of claim 1 is a plurality of cameras for picking up an image of a work to be inspected, and an image judgment for judging the appearance quality from image data obtained through each camera. In the work visual inspection apparatus including means, work dropping means for dropping one piece of the work to be inspected in a predetermined direction is provided, and the camera is arranged so as to face the side surface of the dropped work. .

According to a second aspect of the present invention, in the appearance inspection apparatus according to the first aspect, the camera is arranged on a plane orthogonal to the center locus of the falling work.

According to a third aspect of the present invention, in the appearance inspection apparatus according to the first or second aspect, the camera is arranged close to the work dropping means.

The invention of claim 4 is any one of claims 1 to 3.
In the appearance inspection apparatus according to the item, the work dropping means, a work chute that continuously guides the work in the same direction,
The present invention is characterized by comprising a work slicing machine for dropping the first work in the work chute from the opening of the chute in a predetermined direction.

According to a fifth aspect of the present invention, in the appearance inspection apparatus according to the fourth aspect, the work cutting machine includes a fall restricting tool for restricting the fall of the work, and a posture correcting tool for correcting the posture of the leading work. It is characterized in that it is provided with a cutting control tool for controlling the fall of the top work.

According to a sixth aspect of the invention, in the appearance inspection apparatus according to the fifth aspect, the cutting control tool is also used as the posture correcting tool.

The invention of claim 7 is any one of claims 1 to 6.
The appearance inspection apparatus according to the item 1 is characterized in that a work allocating means for allocating a work after imaging to a good product and a defective product based on a determination result is provided.

The invention according to claim 8 is characterized by further comprising work allocating means for allocating the imaged work to a non-defective product, a defective product and a re-inspected product based on the determination result.
6. A work visual inspection apparatus according to any one of 6 above.

According to a ninth aspect of the present invention, in the visual inspection apparatus according to the seventh or eighth aspect, the work allocating means transfers the work into a box, and a work allocator that transfers the imaged work into the box. It is characterized by having and.

[0016]

According to the first aspect of the invention, the side surface of the work dropped from the work dropping means in the predetermined direction can be imaged by each camera during the dropping process of the work.

According to the invention of claim 2, in addition to the operation of claim 1, the camera arrangement space can be reduced by arranging a plurality of cameras on one plane.

According to the third aspect of the present invention, in addition to the actions of the first and second aspects, it is possible to perform imaging in a low speed state immediately after falling.

In the inventions of claims 4 and 5, claims 1 to 3 are provided.
In addition to the function of the invention described above, it is possible to surely drop the first work piece in the work chute in a predetermined direction by the work cutting machine.

In the sixth aspect of the present invention, in addition to the action of the fifth aspect, the configuration of the work cutting machine can be simplified by using the posture correcting tool as the cutting control tool.

In the inventions of claims 7 and 8, claims 1 to 6 are provided.
In addition to the above function, the work after imaging can be automatically sorted into a good product and a defective product, or a good product, a defective product, and a re-inspection product.

According to the ninth aspect of the present invention, in addition to the action of the seventh or eighth aspect, the workpieces after the image pickup can be reliably sorted by the workpiece sorter and can be stored in the boxes in various types.

[0023]

1 to 4 show an embodiment of the present invention, FIG. 1 is a schematic perspective view of a mechanical portion, FIG. 2 is a configuration diagram of an electric system circuit, FIG. Is a flow chart of appearance inspection.

In FIG. 1, 1 is a parts feeder, 2 is a cylindrical parts chute connected to a conveying rail 1a of the parts feeder, 3 is a parts cutting machine provided at an end of the parts chute 2, and C is a diagram. It is the same capacitor as No. 5. A large number of capacitors C to be inspected are housed in the parts feeder 1, and the capacitors C are arranged in the longitudinal direction and are arranged in the transport rail 1
It moves on a and is sequentially fed into the component chute 2.
The capacitor C fed to the component chute 2 is continuously guided in the chute 2 in the same direction to the component cutting machine 3. The component slicing machine 3 is provided with a drive source such as a solenoid and a member operated by the drive source, and operates based on a slicing signal from a slicing drive circuit 10 which will be described later to operate the lowest capacitor C in the component chute 2. From the lower end opening of the chute 2, one piece is dropped in a predetermined direction.

Reference numerals 4 to 7 denote four CCD cameras, which are arranged so as to face the respective surfaces C1 to C4 of the capacitor C on a plane orthogonal to the central locus (perpendicular line) of the capacitor C dropped from the component cutting machine 3. It is arranged radially at angular intervals of 90 degrees. Each CCD so that it can be imaged at low speed immediately after falling
The cameras 4 to 7 are arranged as close to the component cutting machine 3 as possible. In addition, each CCD camera 4-7 is an illuminator 4a-7a.
And respectively illuminates the respective surfaces C1 to C4 of the condenser C during image pickup. LEDs that can be turned on and off instantaneously are used as the light sources of the illuminators 4a to 7a.

Reference numeral 8 is a component allocating means, which is a component allocating device 8a,
It is composed of a good product box 8d and a bad product box 8e. The component sorter 8a includes a drive source such as a solenoid and a member operated by the drive source. The component sorter 8a operates based on a sort signal from a sort drive circuit 11 to be described later to make a capacitor C after imaging into a good product and a defective product. Sort. The non-defective products sorted by the component sorter 8a are sent to the non-defective product box 8d through the chute 8b, and the defective products are sent to the defective product box 8e through the chute 8c to be stored according to the type.

In FIG. 2, 4 to 7 are CCD cameras described above, and 9 is an image determination device. This image determination device 9
An image data memory 9a for storing image data obtained through the CCD cameras 4 to 7, a data conversion unit 9b for binarizing each image data, and a binary data memory for storing the binarized image data. 9c, a reference data memory 9d that stores standard patterns corresponding to the surfaces C1 to C4 of the non-defective capacitor C, and a determination processing unit 9e. The determination processing unit 9e includes a CPU, a memory that stores a program, and the like. Based on the program, the drive control of the cameras 4 to 7 and the pass / fail determination of the capacitor C are performed, and the component slicing machine 3 and the component allocator are performed. 8 drive control is performed respectively. Reference numeral 10 denotes a cutout drive circuit, which sends out a cutout signal to the component cutout machine 3 based on a control signal from the determination processing section 9e. A distribution driving circuit 11 sends a distribution signal to the component distributor 8a based on a control signal from the determination processing unit 9e.

The procedure of the appearance inspection in the above appearance inspection apparatus will be described below with reference to FIGS. 3 and 4.

First, a control signal for cutting out a component is sent to the cutout drive circuit 10, and the cutout signal from the drive circuit 10 operates the component cutout machine 3 so that the lowest position in the component chute 2 is reached. The capacitor C is dropped in a predetermined direction (S in FIG. 4).
1).

When a short time has passed since the operation of the component cutting machine 3, that is, at the timing when the dropped capacitor C passes through the field of view of the camera as shown in FIG.
The illuminator 4a of the D camera 4 is turned on to image the surface C1 of the condenser C, and the obtained image data is stored in the image data memory 9a (S2 to S4 in FIG. 4). When the image pickup of the surface C1 is completed, the illuminator 5a of the second CCD camera 5 is turned on to pick up the image of the surface C2 of the condenser C, and the obtained image data is stored in the image data memory 9a (FIG. 4). S5, S6). Similarly, the surfaces C3 and C4 of the capacitor C
Are sequentially captured by the third and fourth CCD cameras 6 and 7, and the obtained image data is stored in the image data memory 9a (S7 to S10 in FIG. 4).

Since the image pickup by the CCD cameras 4 to 7 is instantaneously completed and the image pickup is performed immediately after the falling at a slow speed, the above-mentioned image pickup is not supported even when the cameras 4 to 7 are radially arranged. You can do it.

After the imaging of the respective surfaces C1 to C4 of the condenser C is completed, each image data stored in the image data memory 9a is binarized and stored in the binarized data memory 9c (S7 to S7 in FIG. 4). S10). Then, the image data of each surface C1 to C4 is read out from the binarized data memory 9c, and the standard pattern corresponding to each surface C1 to C4 is read out from the reference data memory 9d, and each surface C1 to C4 is read by a well-known pattern matching method. Of the external appearance is determined (S1 in FIG. 4).
1 to S14).

Although the above-described image pickup and determination are processed in a time-division manner, they can be processed in parallel depending on the processing capacity of the apparatus itself, and a light-shielding plate or the like is arranged between the cameras to perform image pickup by simultaneous illumination. If the influence is eliminated, it is possible for the cameras 4 to 7 to simultaneously perform imaging. Further, although the image pickup timing is grasped by the time from the cutout, the image pickup timing may be grasped based on the detection signal of the photoelectric switch or the like provided during the fall of the capacitor. Further, the quality of appearance may be determined by a method other than pattern matching.

After the determination, a control signal corresponding to the determination result is sent to the distribution drive circuit 11, and the component distribution machine 8a is operated by the distribution signal from the drive circuit 11 (S1 in FIG. 4).
5). As a result, the capacitors C after imaging are sorted into a good product and a bad product, which are the good product box 8 and the bad product box 8e.
It is sent to each and is accommodated in the classification.

The cutting speed of the capacitor C by the parts cutting machine 3 is several to several tens per second, and the above-mentioned image pickup, judgment, and distribution are sequentially repeated every cutting.

As described above, according to the above appearance inspection apparatus,
The respective faces C1 to C4 of the condenser C dropped in a predetermined direction from the component slicing machine 3 can be picked up by the respective cameras 4 to 7 in the dropping process of the condenser C. It is possible to significantly reduce the appearance inspection time per component without the trouble of rotating the component, and to simplify the device itself by eliminating the component rotation mechanism.

Further, since the camera arrangement space can be reduced by arranging the four CCD cameras 4 to 8 on one plane, the height of the apparatus can be reduced as compared with the case where the cameras are arranged in a staggered manner in the vertical direction. it can.

Furthermore, the capacitor C is placed in the low speed state immediately after the drop.
Since each of the surfaces C1 to C4 can be imaged, it is possible to accurately perform imaging without blurring and obtain a clear image.

Here, the specific construction of the above-mentioned component chute and component cutting machine will be described with reference to FIG.

The component chute 21 shown in the figure has a rectangular tubular shape with a lower end opening having a passage similar to the sectional shape of the capacitor C, and guides the capacitor C downward in the same longitudinal direction. The component chute 21 has a rectangular hole 21a in the center of one side surface corresponding to the second capacitor C, and has a rectangular hole 21b extending in two sides at the corner corresponding to the lowest capacitor C. ing.

On the other hand, in the component cutting machine, the first pressing pin 22 for regulating the drop capable of horizontally reciprocating toward the upper hole 21a of the component chute 21 and the lower hole 21b of the component chute 21.
A second pressing pin 23 for posture correction capable of horizontally reciprocating toward the user and a lid plate 24 for cutting control capable of horizontally reciprocating so as to open and close the lower end opening of the component chute 21. There is. First pressing pin 2 that directly presses the capacitor C
2 has a flat head pad 22 made of rubber or soft resin at the tip.
Also, a pad 23a made of the same material and having a V-shaped groove is provided at the tip of the second pressing pin 23.
Although not shown, the first pressing pin 22 and the second pressing pin 2
3 and the lid plate 24 are respectively dedicated drive sources such as solenoids,
It is driven by a motor, cylinder, etc.

At the time of cutting, first, the first and second pressing pins 22 and 23 are retracted with the lid plate 24 closing the lower end opening of the component chute 21. The lowest capacitors C in the component chute 21 are supported by the cover plate 24, and the capacitors C are arranged in a line in the vertical direction in the chute 21. Then the first
The pressing pin 22 is moved forward to press the second capacitor C against the inner wall of the chute 21, and the second and subsequent capacitors C are pressed.
The fall of the sheet (see FIG. 7A). Then, the second pressing pin 23 is advanced to press the lowest capacitor C against the corner of the chute 21, and the posture of the capacitor C is corrected by the two adjacent inner walls (see FIG. 7B). Next, while retracting the second pressing pin 23, the lid plate 24 is retracted in the same direction as the pressing direction during correction (see the white arrow in FIG. 7B) so that the corrected posture of the capacitor C is not collapsed. Then, the lower end opening of the component chute 21 is opened. As a result, the lowest capacitor C whose posture has been corrected falls while maintaining the same posture.

After the drop, the cover plate 24 is returned to the forward direction, and the first pressing pin 22 is retracted to release the above pressing, and the second capacitor C is supported by the cover plate 24. After that, if the above-described drop regulation, posture correction, and cutting are sequentially repeated, the lowest capacitor C in the component chute 21 can be dropped from the lower end opening of the chute 21 in a predetermined direction.

The first pressing pin 2 for dropping regulation shown in FIG.
2 is an air suction port 21 provided on the side surface of the component chute 21.
c (see FIG. 8A) or an air supply port 21d (see FIG. 8B) provided on the side surface of the component chute 21. Since the capacitor C itself is not a heavy object, a negative pressure due to air is used. Alternatively, the same drop regulation can be performed with positive pressure. Also,
One pair of the upper hole 21a and the first pressing pin 22 are provided so as to face each other,
The second capacitor C may be sandwiched between the two pins 22.

The second pressing pin 23 for posture correction shown in FIG. 6 is provided on the air inlet 21e (see FIG. 9A) provided on the side surface of the component chute 21 or on the side surface of the component chute 21. The air outlet 21f (see FIG. 9B) may be used, and since the condenser C itself is not a heavy object, the same posture correction can be performed even with negative pressure or positive pressure by air.
Further, a magnet 25 is provided on the side surface of the component chute 21 (see FIG.
(See (c)), it is also possible to perform the same posture correction by attracting the metal portion (electrode) of the capacitor C by the magnet 25. Further, the inclined portion 21g may be integrally formed at the lower end of the component chute 21 (see FIG. 9D), and the downward movement force of the capacitor C may be used to correct the posture.

Further, the cover plate 24 for cutting control shown in FIG.
Is such that the lower end opening of the component chute 21 can be opened and closed by reciprocating in an oblique direction (Fig. 10 (a),
24 ') or a device that can be opened and closed by rotation. Further, the cover plate 24 is divided into a plurality of pieces so that both divided lids 24a can be reciprocated in opposite directions (see FIG. 10B), or the divided lids can be reciprocated in an oblique direction. May be. Further, as shown in FIG. 11, the cover plate 26 is movable from the closed state in a locus of downward movement-lateral or diagonal downward movement-return (closed),
The capacitor C may be exposed by leaving the upper end in the chute 21 by the first downward movement, and the capacitor C may be dropped in the next movement process. It should be noted that it is also possible to use the above-mentioned cut-out control cover plate 24 and the like as the above-mentioned posture correction elements (however, excluding those shown in FIGS. 9C and 9D). Therefore, the structure of the component cutting machine can be simplified.

The parts chute and the parts slicing machine may have a structure other than the above, and the specific construction thereof will be described with reference to FIGS. 12 and 13, respectively.

In the structure shown in FIG. 12, a bottomed rectangular tubular part chute 27 is curved so that its lower end is horizontal, and holes 27a and 27b are formed in the upper and lower surfaces of the lower end, respectively. A spring-biased drop-preventing claw piece 28 is provided at the end edge of the hole 27b, and a positioning stopper 29 is provided at the end of the component chute 27 so that it can reciprocate up and down toward the upper hole 27a. A flat-head pin 30 for cutting control is provided. The leading end of the capacitor C in the component chute 27 is in contact with the stopper 29 and is stopped. When the pin 30 is lowered in the same state, the leading capacitor C is claw 2.
While pushing 8 away, it falls from the lower hole 27b. The horizontal posture of the falling capacitor C can be corrected at the same time as being cut out on the lower surface of the pin 30, and if the pin 30 is made large and a trapezoidal recess for receiving the upper portion of the capacitor C is formed on the lower surface, The posture can be corrected more reliably.

In the structure shown in FIG. 13, similarly to the above, the bottomed square tubular part chute 27 is curved to make its lower end horizontal, and holes 27a and 27b are formed in the upper and lower surfaces of the lower end, respectively. At the same time, instead of the claw piece 28, a reciprocating lid plate 28 'that opens and closes the lower hole 27b is arranged, a positioning stopper 29 is provided at the end of the component chute 27, and the upper and lower holes 27a are vertically moved. Further, a reciprocating flat head pin 30 for cutting control is provided. Parts chute 27
The leading end of the capacitor C in the inside comes into contact with the stopper 29 and is stopped. When the pin 30 is lowered while retracting the cover plate 28 'in the same state, the leading capacitor C is moved to the lower hole 27.
fall from b. The horizontal posture of the falling capacitor C can be corrected at the same time as being cut out on the lower surface of the pin 30.
If the trapezoidal recess that receives the upper part of the above is formed, the above posture correction can be performed more reliably.

Next, the specific construction of the above-mentioned component sorter and component storage box will be described with reference to FIG.

The structure shown in FIG. 14A is composed of a damper 31 on which the component sorter can swing and a drive source (not shown) such as a solenoid, a motor, a cylinder for driving the damper 31, and the like. , The parts storage box 32 and the non-defectives storage section 32
a and the defective product storage portion 32b are integrated. The damper 31 is arranged in the upper center of the component housing box 32, and the capacitors C after imaging are sorted by the tilting of the damper 31 and housed in the respective housing portions 32a and 32b.

In FIG. 14B, the component distributor comprises an air blowing nozzle 33 and an air supply source (not shown) such as a compressor for supplying air to the nozzle 33. The box 34 has a non-defective product storage portion 34a and a defective product storage portion 34b integrated with each other. The capacitor C after imaging falls toward the non-defective product accommodating portion 34a, but when air is blown out from the air blowing nozzle 33, the capacitor C is blown to the defective product accommodating portion 34b side and the accommodating portion 3
It is housed in 4b. When the blown-off capacitor C collides with the wall surface of the defective product storage portion 34b, a cushion material 34c may be provided at the same portion to reduce the impact.

FIG. 14 (c) shows an inclined block 35 having a substantially triangular shape in which the component distributor can be horizontally moved, and a drive source (not shown) such as a solenoid, a motor, a cylinder for driving the block 35. On the other hand, in the component storage box 36, a good product storage portion 36a and a defective product storage portion 36b are integrated. The tilted block 35 is arranged in the upper center of the component storage box 36, and the condenser C after imaging is sorted according to the position of the block 35 and the storage portions 36a, 36a.
It is accommodated by type in b.

In FIG. 14 (d), the component distributor is a container 37a having two fan-shaped holes 37a1 and 37a2 on the bottom surface, and a V-shaped rotary blade rotatably arranged in the container 37a. 37b and a drive source (not shown) such as a solenoid, a motor and a cylinder for driving the rotary vanes 37b. On the other hand, the component storage box 38 has a non-defective product storage portion 38a and a defective product storage portion 38b integrated with each other. There is. Container 37a
Is placed in the upper center of the component housing box 38, and the condenser C after imaging is once received by the non-perforated portion of the container 37a, and the fan-shaped hole 37a is rotated by the forward and reverse rotation of the rotary blade 37b.
1, 37a2, and falls through the hole and is accommodated in each of the accommodating portions 38a, 38b.

The above-described component sorter sorts the capacitors after imaging into good products and defective products, but it is also possible to sort the capacitors into good products, defective products, and re-inspected products, and its specific configuration is as follows. This will be described with reference to FIG.

In FIG. 15 (a), the component distributor comprises two upper and lower air blowing nozzles 41 and an air supply source (not shown) such as a compressor for selectively supplying air to the nozzles 41. On the other hand, the component storage box 42 includes a non-defective product storage portion 42a, a defective product storage portion 42b, and a re-inspection product storage portion 42.
c is integrated. The condenser C after imaging falls toward the non-defective container 34a, but when air is blown from the upper air blowing nozzle 41, the condenser C is blown to the re-inspection containing portion 42c side, and the lower air blowing nozzle 41c. When air is blown from 41, the capacitor C is blown to the side of the defective product storage portion 42b, and each of the storage portions 42c, 4c.
It is housed in 2b. When the blown-out capacitor C collides with the wall surface, the cushion material 42d
Is provided to reduce the impact.

FIG. 15 (b) shows a container 43a in which the component distributor has three recesses, which is horizontally movable, three flexible tubes 43b communicating with the bottoms of the recesses, and the container 43.
and a drive source (not shown) such as a solenoid for driving a, a motor, a cylinder, and the like. On the other hand, the component storage box 44 includes a non-defective product storage portion 44a, a defective product storage portion 44b, and a reinspection product storage portion that are integrated. There is. The container 43a is arranged in the upper center of the component storage box 44, and the capacitor C after imaging is the container 43.
It is received in a predetermined concave portion by the horizontal movement of a, falls from the concave portion through the tube 43b, and falls into each of the accommodating portions 44a to 4a.
4c is accommodated by type.

The one shown in FIG. 15C is a guide cylinder 45 for guiding the drop of the condenser C after the image is picked up by the parts sorter.
a and a conveyor 45b that receives the capacitor C and conveys it in one direction, and three pushers (not shown) for pressing and dropping the capacitor C on the conveyor 45b according to whether it is a good product, a defective product, or a re-inspected product, and a conveyor 45b. And a drive source (not shown) such as a solenoid, a motor, and a cylinder for driving the pushers, while the component storage box (not shown) is arranged at a position where the capacitors C dropped by the pushers can be received. Has been done. The capacitors C after the image pickup are conveyed in a line on the conveyor 45b, are pressed by each pusher during the conveyance, fall from the conveyor 45b, and are accommodated in each accommodation box in a type.

In the above embodiment, four cameras are arranged on a plane orthogonal to the center locus of the falling condenser, but the cameras are arranged vertically in a staggered manner along the locus. The number may be increased or decreased depending on the number of inspection surfaces. Further, although one inspection surface is imaged by one camera, the number of cameras can be reduced if two adjacent surfaces are simultaneously imaged by one camera.

As described above, in the embodiment, the capacitor is exemplified as the inspection object. However, the present invention is not limited to the capacitor,
For example, resistors, inductors, transformers, composite parts, ICs
It can be widely applied to the visual inspection of works other than electronic parts such as chips and multilayer boards. Further, the shape of the work to be inspected is not limited to the quadrangular prism as shown in the figure, but may be another polygonal prism or a cylinder.

[0061]

As described above in detail, according to the first aspect of the invention, the side surface of the workpiece to be inspected dropped from the workpiece dropping means in the predetermined direction can be imaged by each camera during the dropping process of the workpiece. As in the prior art, there is no trouble of rotating the work for imaging, the appearance inspection time per work can be greatly shortened, and the work itself can be simplified without the work rotation mechanism. .

According to the second aspect of the present invention, since the camera arrangement space can be reduced by arranging the plurality of cameras on one plane, the height of the device is reduced as compared with the case where the cameras are arranged in a staggered manner in the vertical direction. be able to. The other effects are the same as in claim 1.

According to the third aspect of the invention, since the image can be picked up in a low speed state immediately after falling, it is possible to accurately pick up the image without causing blurring and obtain a clear image. Other effects are the same as in claims 1 and 2.

According to the fourth and fifth aspects of the present invention, the first work piece in the work chute can be surely dropped by the work cutting machine in a predetermined direction to one piece, and the posture of the falling work piece can be stabilized. Imaging and visual inspection can be performed with high accuracy. Other effects are the same as in claims 1 to 3.

According to the sixth aspect of the present invention, the configuration of the work cutting machine can be simplified by using the posture correcting tool as the cutting control tool. The other effects are the same as those in claim 5.

According to the seventh and eighth aspects of the present invention, it is possible to automatically sort the work after imaging into a good product and a defective product, or a good product, a defective product, and a re-inspected product, thus reducing the time and effort required for the work distribution. It can be reduced to contribute to shortening the inspection time.
Other effects are the same as in claims 1 to 6.

According to the ninth aspect of the present invention, it is possible to surely sort the work after the image pick-up by the work sorter and store the work in the box according to the type, and it is possible to easily handle the work after the inspection. The other effects are the same as those of claims 7 and 8.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a mechanism section according to the present invention.

FIG. 2 is a configuration diagram of the electric system circuit.

FIG. 3 is an explanatory diagram of the same imaging.

FIG. 4 is a flowchart of the appearance inspection.

FIG. 5 is a configuration diagram of a conventional appearance inspection device.

FIG. 6 is a diagram showing a specific configuration of a component chute and a component cutting machine.

[Fig. 7] Operation explanatory diagram

FIG. 8 is a view showing a modified example of the fall restricting tool.

FIG. 9 is a view showing a modified example of the posture correction tool.

FIG. 10 is a view showing a modified example of the cutout control tool.

FIG. 11 is a view showing a modified example of the cutout control tool.

FIG. 12 is a diagram showing another configuration example of a component chute and a component cutting machine.

FIG. 13 is a diagram showing another configuration example of the component chute and the component cutting machine.

FIG. 14 is a diagram showing a specific configuration of a component sorter and a component storage box.

FIG. 15 is a diagram showing another configuration example of the component sorter and the component storage box.

[Explanation of symbols]

2 ... Component chute, 3 ... Component cutting machine, 4-7 ... CCD camera, 8a ... Component sorter, 8d, 8e ... Box, 9 ... Image judging device, C ... Capacitor, C1-C4 ... Inspected surface, 21
... parts chute, 21c ... air suction port, 21d ... air supply port, 21e ... air suction port, 21f ... air supply port, 21
g ... inclined portion, 22, 23 ... pressing pin, 24, 24 ', 2
6 ... Lid plate, 24a ... Divided lid, 25 ... Magnet, 27 ... Component chute, 28 ... Claw piece, 28 '... Lid plate, 29 ... Stopper,
30 ... Pin, 31 ... Damper, 32 ... Box, 33 ... Air blowout nozzle, 34 ... Box, 35 ... Block, 36 ... Box, 37a
... container, 37b ... rotary blade, 38 ... box, 41 ... air blowing nozzle, 42 ... box, 43a ... container, 43b ... tube,
45a ... Guide tube, 45b ... Conveyor.

Claims (9)

[Claims] 1. A work appearance inspection apparatus comprising a plurality of cameras for picking up an image of a work to be inspected, and image judging means for judging the quality of the appearance from image data obtained through each camera. The work visual inspection apparatus is characterized in that a work dropping means is provided for dropping each piece of work, and the camera is arranged so as to face a side surface of the dropped work. 2. The work visual inspection apparatus according to claim 1, wherein the camera is arranged on a plane orthogonal to the center locus of the falling work. 3. The work visual inspection apparatus according to claim 1, wherein a camera is disposed in the vicinity of the work dropping means. 4. A work chute in which the work dropping means continuously guides the work in the same direction, and a work cutting machine that drops the first work in the work chute one by one in a predetermined direction from the opening of the chute. The work visual inspection apparatus according to any one of claims 1 to 3, further comprising: 5. The work cutting machine comprises a drop restricting tool for restricting the fall of the work, a posture correcting tool for correcting the attitude of the leading work, and a cutting control tool for controlling the falling of the leading work. The visual inspection device for a work according to claim 4, wherein 6. The work appearance inspection apparatus according to claim 5, wherein the cutting control tool is also used as the posture correcting tool. 7. A visual inspection of a work according to claim 1, further comprising work allocating means for allocating a work after imaging to a good product and a defective product based on a determination result. apparatus. 8. The work allocating means for allocating a work after imaging to a non-defective product, a defective product, and a re-inspected product based on the determination result is provided. Appearance inspection device for work. 9. The work allocating means comprises a box for accommodating the works by type, and a work allocating device for transferring the imaged works into the box. Appearance inspection device for work.