JPH0587744A - Method for inspecting surface of article and device used therefor - Google Patents

Abstract

PURPOSE:To simultaneously inspect the front and side faces of an article with one image pickup device. CONSTITUTION:A prism (reflecting means) 8 which reflects light emitted from the side face 20 of a tablet (article to be inspected) T to the front face 19 side of the tablet T is arranged so that the prism 8 can be opposed to the side face 20 of the tablet T. The pictures of the front face 19 of the tablet T and light coming out from the prism 8 are taken with a TV camera (two- dimensional, image pickup device) 16. By processing video signals from the camera 16, the front face 19 and side face 20 of the tablet T are inspected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting the surface of articles such as tablets, capsules, electronic parts and mechanical parts and an apparatus used therefor, that is, an apparatus for inspecting a surface of an article, a prism for surface inspection and a reflection for surface inspection. The present invention relates to a mirror block and a rotary drum for surface inspection.

[0002]

2. Description of the Related Art Conventionally, for example, the surface inspection of tablets has been performed mainly by the following two methods.

The tablets are placed one by one from a hopper on a horizontal transparent glass rotating disk, and the upper surface of the tablet is taken by a TV camera placed above the disk and the tablet is taken by a TV camera placed below the disk. The lower surface is inspected by imaging each side surface of the tablet with a television camera arranged on the side of the disk (first method).

Tablets are supplied one by one from a hopper to a pocket formed on the outer peripheral surface of the first rotating drum, and the surface of the rotating tablet held in the pocket is imaged and inspected by a television camera. The tablets are supplied one by one from the rotating drum of No. 1 to the pocket formed on the outer peripheral surface of the second rotating drum, and the back surface of the tablet held in this pocket and rotated is imaged and inspected by the TV camera (second Method).

Conventionally, the surface inspection of electronic parts has been performed mainly by the following method.

The electronic parts are conveyed one by one by the conveyor, and the upper surfaces of the electronic parts are imaged by the TV cameras arranged above the conveyor and the both side surfaces of the electronic parts are respectively imaged by the TV cameras arranged on both sides of the conveyor. (Third method).

[0007]

However, the above conventional methods have the following problems.

First, in the first method, when the rotation speed of the rotating disk is increased, the tablet slides on the glass surface of the disk.
The efficiency is poor, and the capacity can be increased only up to, for example, about 100,000 tablets / hour. Further, even when inspecting only one place on the upper and lower sides and the side surface of the tablet, three TV cameras are required, and more TV cameras are required to inspect the side surface over the entire circumference, resulting in cost increase.

In the second method, the tablets enter the pockets of the drum, so that the side surface cannot be inspected.

The third method requires at least three TV cameras, which increases the cost. Moreover, since the television camera cannot be arranged in the traveling direction of the electronic component, the front and rear side surfaces of the electronic component cannot be inspected.

An object of the present invention is to solve all the above problems and to provide an inexpensive method and apparatus capable of simultaneously inspecting the front and side surfaces of an article with a single image pickup apparatus.

[0012]

In the surface inspection method for an article according to the present invention, reflecting means for reflecting the light emitted from the side surface of the article to be inspected to the front side of the article to be inspected is arranged so as to face the side surface of the article to be inspected. The two-dimensional imaging device images the light emitted from the front surface of the inspection object and the reflection means and processes the video signal from the two-dimensional imaging device to inspect the front surface and the side surface of the inspection object. is there.

The reflecting means may be a prism.

An annular prism may be arranged around the side surface of the inspected article so as to surround the inspected article.

It may be constructed by combining a plurality of portions obtained by dividing an annular prism in the circumferential direction.

A plurality of prisms may be arranged circumferentially at intervals around the side surface of the article to be inspected.

The reflecting means may be a reflecting mirror having a reflecting surface formed of a concave conical surface.

The surface inspection apparatus for an article according to the present invention is arranged so as to face the side surface of the article to be inspected, and reflects the light emitted from the side surface of the article to be inspected to the front side of the article to be inspected. A two-dimensional image pickup device which is arranged so as to face the front surface of the article and the reflecting means and picks up light emitted from the front surface of the article and the reflecting means, and an object to be inspected by processing a video signal from the two-dimensional image pickup device. An image processing apparatus for inspecting the front and side surfaces of an article is provided.

The reflecting means may be a prism.

The prism may be an annular member arranged around the side surface of the inspected article so as to surround the inspected article.

The annular prism may be constructed by combining a plurality of circumferentially divided parts.

A plurality of prisms may be arranged circumferentially around the side surface of the article to be inspected.

The reflecting means may be a reflecting mirror having a reflecting surface formed of a concave conical surface.

The surface inspection prism for an article according to the present invention has an annular shape and is provided with a hole for accommodating an article to be inspected.

The prism may be formed in an annular shape by combining a plurality of circumferentially divided parts.

In the reflecting mirror block for surface inspection of an article according to the present invention, a circular tapered hole-shaped pocket for accommodating an object to be inspected is formed, and a reflecting surface formed of a concave conical surface is formed on the inner periphery of this pocket. The rotary drum for inspecting the surface of an article according to the present invention has a plurality of pockets formed on the outer peripheral surface, and an annular prism having a hole for accommodating the article to be inspected is mounted in each pocket. It is a thing.

The annular prism may be constructed by combining a plurality of circumferentially divided parts.

The rotary drum for inspecting the surface of an article according to the present invention also has a plurality of circular tapered hole-shaped pockets for accommodating the object to be inspected formed on the outer peripheral surface thereof, and a reflection having a concave conical surface on the inner periphery of the pockets. A surface is formed.

A plurality of reflecting mirror blocks may be attached to the outer peripheral surface of the rotating drum, and a pocket and a reflecting surface may be formed in each reflecting mirror block.

In this specification, the front surface of the article to be inspected means a surface facing the image pickup device, and the side surface means a surface around the front surface. Further, the reflection includes total reflection and specular reflection.

[0031]

According to the surface inspection method of the present invention, the light emitted from the side surface of the inspected article is reflected to the front side of the inspected article by the reflecting means such as a prism or a reflecting mirror, so that the image is inspected by one imaging device. The front and side of an article can be imaged and inspected simultaneously.

If an annular prism is arranged around the side surface of the article to be inspected so as to surround the article to be inspected, a single image pickup device can simultaneously image and inspect the entire front and side surfaces of the article to be inspected. You can

If the annular prism is constructed by combining a plurality of parts divided in the circumferential direction, the prism can have a shape suitable for the article to be inspected.

By disposing a plurality of prisms around the side surface of the article to be inspected at intervals in the circumferential direction, it is possible to inspect only a desired portion of the side surface of the article to be inspected.

If the reflecting means is a reflecting mirror having a reflecting surface formed of a concave conical surface, the front and side circumferences of the article to be inspected arranged inside the reflecting surface can be simultaneously imaged and inspected by a single image pickup device. You can

According to the surface inspection apparatus of the present invention, since the surface inspection apparatus is provided with the reflecting means such as the prism and the reflecting mirror for reflecting the light emitted from the side surface of the inspection object to the front side of the inspection object,
It is possible to inspect and inspect the front and side surfaces of the article to be inspected at the same time with one imaging device.

If the prism is a ring-shaped one that is arranged around the side surface of the inspected article so as to surround the inspected article, the front surface and the entire side surface of the inspected article can be simultaneously imaged by one imaging device. Can be inspected.

If the annular prism is formed by combining a plurality of parts divided in the circumferential direction, the prism can have a shape suitable for the article to be inspected.

If a plurality of prisms are arranged around the side surface of the article to be inspected at intervals in the circumferential direction, it is possible to inspect only a desired portion of the side surface of the article to be inspected.

If the reflecting means is a reflecting mirror having a reflecting surface formed of a concave conical surface, the entire front and side surfaces of the article to be inspected arranged inside the reflecting surface are simultaneously imaged and inspected by one image pickup device. be able to.

According to the surface inspection prism of the present invention,
The light emitted from the entire circumference of the side surface of the inspected article housed in the hole of the annular prism can be reflected by the annular prism to the front side of the inspected article. And it becomes possible to inspect by imaging the entire circumference of the side surface at the same time.

If the prism is formed in an annular shape by combining a plurality of portions divided in the circumferential direction, the prism can be formed into a shape suitable for the article to be inspected.

According to the reflecting mirror block for surface inspection of the present invention, the light emitted from the entire circumference of the side surface of the article to be inspected, which is accommodated in the pocket having the circular tapered hole shape, is reflected by the reflecting surface of the concave conical surface of the article to be inspected. Since the light can be reflected to the front side, it is possible to inspect and inspect the entire front and side surfaces of the article to be inspected at the same time with one imaging device.

According to the surface inspection rotary drum of the present invention, the light emitted from the entire circumference of the side surface of the inspected article housed in the hole of the annular prism is reflected by the annular prism toward the front side of the inspected article. Therefore, it becomes possible to simultaneously inspect and inspect the front surface and the entire side surface of the article to be inspected, which is rotating together with the rotating drum, by one imaging device.

If the annular prism is formed by combining a plurality of parts divided in the circumferential direction, the prism can have a shape suitable for the article to be inspected.

Further, according to the surface inspection rotary drum of the present invention, the object to be inspected can be easily positioned and accommodated in the pocket having the circular tapered hole shape, and moreover, the entire side surface of the object to be inspected accommodated in the pocket is accommodated. Light emitted from the circumference can be reflected to the front side of the inspected article by the reflecting surface formed of the concave conical surface, and therefore, the entire front and side circumferences of the inspected article rotating together with the rotating drum are integrated into one imaging device. It is possible to take an image and inspect at the same time.

If a plurality of reflecting mirror blocks are attached to the outer peripheral surface of the rotating drum and pockets and reflecting surfaces are formed in each reflecting mirror block, the reflecting mirror block is replaced when the size of the inspection object changes. This can be dealt with easily.

[0048]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show the first embodiment.

The first embodiment is for inspecting both front and side circumferences of a disk-shaped tablet, and the overall construction of the surface inspection apparatus is shown in FIG. In the description of the first embodiment, up, down, left and right refer to FIG.

The surface inspection apparatus comprises a first rotary drum (first drum) (1) and a second rotary drum (second drum) (2) which rotate about parallel horizontal axes. First
The drum (1) is arranged on the left side and the second drum (2) is arranged on the right side so that they are close to each other. The first drum (1) is in the counterclockwise direction in FIG. 1, and the second drum (2) is in the same direction. They are rotated clockwise in synchronization with each other.

A large number of pockets (3) having a circular cross section are formed on the outer peripheral surface of the first drum (1) at equal intervals in the circumferential direction,
The bottom of each pocket (3) is provided with a suction hole (4) for vacuum suction of the tablet (T).

As shown in detail in FIG. 2, the second drum (2)
A large number of pockets (5) are formed on the outer peripheral surface of the at equal intervals in the circumferential direction. The pocket (5) has a circular cross section,
The taper widens toward the outer peripheral surface of the drum (2). A short columnar protrusion (6) is formed on the bottom of the pocket (5), and an adsorption hole (7) for vacuum adsorption of the tablet (T) is provided on the protrusion (6). An annular prism (reflecting means) (8) is mounted in each pocket (5). As shown in detail in FIGS. 2 and 3, the prism (8) has a cross section in which a reflecting surface (8c) is formed between a first right-angled surface (8a) and a second right-angled surface (8b) which are perpendicular to each other. A right-angled isosceles right-angled prism is formed in an annular shape.
The inside of the first right-angled surface (8a) is a straight hole (9) having a circular cross section for accommodating the tablet (T). The axial length of this hole (9) is longer than the thickness of the tablet (T), and the inner diameter is slightly larger than the outer diameter of the tablet (T). In the prism (8), the end of the hole (9) on the opposite side of the second right-angled surface (8b) is fitted to the outside of the protrusion (6), and the reflecting surface (8c) is the tapered surface of the pocket (5). By being fixed, it is fixed in the pocket (5) and the second right-angled surface (8
b) is exposed outward. On the tapered surface of the pocket (5), a shallow annular groove (34) is formed over a range slightly wider than the part corresponding to the thickness of the tablet (T), and the reflective surface (8c) of the prism (8) in this part is formed. A thin air layer (35) is formed between them. The prism (8) is made of a transparent material such as glass, quartz or plastic, and the light entering from the first right-angled surface (8a) is totally reflected by the reflection surface (8c) of the air layer (35), It goes out through the right-angled surface (8b). When total reflection cannot be used, the reflection surface (8c) is subjected to mirror plating or the like to reflect light.

A tablet hopper is located diagonally above and right of the first drum (1).
(10) is provided. A non-defective product discharge chute (11) is provided below the second drum (2), and a defective product discharge chute (12) is provided on the right side thereof. In addition, a good product discharge chute (1
On the left side of the upper part of 1), an air nozzle (13) for eliminating defective products is provided facing right.

The first television camera (14) is arranged so as to face the pocket (3) which is located in the lower left portion of the first drum (1), and the video signal output from the first television camera (14) is output by the first image processing device ( 1
It is designed to be entered in 5).

The second television camera (two-dimensional image pickup device) (16) is arranged so as to face the pocket (5) which has come to the right side portion of the second drum (2), and the video signal thereof is output by the second image processing device.
It is designed to be input in (17).

Although illustration is omitted, if necessary, the two TV cameras (14) and (16) or the vicinity thereof may be connected to the TV camera (1
4) An illuminating device that illuminates the outer peripheral surfaces of the drums (1) and (2) coming in front of the (16) is provided.

The tablets (T) are fed from the hopper (10) one by one.
It is supplied into the pocket (3) of the drum (1), is vacuum sucked and held in the suction hole (4), and rotates together with the drum (1). The surface of the tablet (T) that faces outward when housed in the pocket (3) of the first drum (1) is the first front surface (18), and the surface that faces inward is the second front surface (19). The cylindrical surface between them is the side surface (20).

The tablet (T) has the pocket (3) of the first drum (1)
While being held and rotated by the first TV camera (14)
The first front surface (18) is imaged by the above, and the video signal thereof is processed by the first image processing device (15) using a known method, so that the surface inspection of the first front surface (18) is performed.

The tablets (T) on which the first front face (18) has been inspected are transferred from the pocket (3) of the first drum (1) to the hole (5) of the prism (8) of the pocket (5) of the second drum (2). 9) Moved into the second
The front surface (19) is held by vacuum suction in the suction hole (7) so that the front surface (19) faces outward, and rotates together with the drum (2).

The tablet (T) is in the pocket (5) of the second drum (2)
The second TV camera (16) while being held and rotated by
The second front surface (19) and the second right-angled surface (8) of the prism (8)
The part b) is imaged, and the video signal is captured by the second image processing device.
The surface inspection of the second front surface (19) and the side surface (20) is performed by performing the processing in (17).

The light emitted from the side surface (20) of the tablet (T) passes through the first right-angled surface (8a) into the prism (8) and is reflected by the reflection surface (8c) of the air layer (35). After that, go out through the second right-angled surface (8b). Therefore, as shown in FIG. 4, the second front surface of the tablet (T) is located at the center of the screen imaged by the second TV camera (16).
The image (G19) of (19) appears around the image (G8) of the second right-angled surface (8b) of the prism (8), and the tablet is placed between the two concentric circles indicated by the chain line in the image (G8). Side view of (T) (20) Full circumference image (G2
0) appears. Therefore, by processing the video signal of the second TV camera (16) by using a known method, the tablets (T) can be cleaned of dirt, chips, foreign matters, etc. around the second front surface (19) and side surface (20) of the tablet (T). Can inspect for abnormalities.

After the inspection of the second front surface (19) and the side surface (20) of the tablet (T), a good product having no abnormal surface is discharged to the good discharge chute (11), and a defective product having abnormal surface is defective. Each is discharged to the discharge chute (12). That is, in the case of a good product, the air nozzle (13) does not work and the tablet (T) is in the second drum.
It drops right under from (2) and enters a good quality chute (11). In case of defective product, the air nozzle (13) is activated and the second drum (2)
The tablet (T) dropped from is blown into the air and enters the defective product discharge chute (12).

FIG. 5 shows a modification of the annular prism (8).

In FIG. 5, the prism (8) is divided into two halves (21) in a plane passing through the axis, and these halves (2
It is formed into an annular shape by combining 1).

6 to 8 show the second embodiment.

The second embodiment also performs the same inspection as in the first embodiment, and FIG. 6 shows a part of the outer circumference of the second drum (2) of the surface inspection apparatus. The same parts as those in the first embodiment are designated by the same reference numerals.

As shown in FIG. 6, shallow circular hole-shaped block accommodating recesses (36) are formed on the outer peripheral surface of the second drum (2) at equal intervals in the circumferential direction, and the recesses (36) Fig. 7 shows a short cylindrical metal reflector block (reflecting means)
(37) is tightly fitted and fixed. The surface of the block (37) (the end surface on the outer peripheral side of the drum (2)) (37a) and the back surface (the end surface on the inner peripheral side of the drum (2)) (37b) are flat surfaces parallel to each other, and tablets are formed on the front surface (37a). Pocket for accommodating (T)
(38) is formed. The pocket (38) is in the shape of a circular taper hole whose surface (37a) side is widened, and a reflection surface (38a) formed of a concave conical surface is formed on the inner periphery thereof. Also, the circular bottom (38b) of the pocket (38) and the back (37b) of the block (37).
Between the suction holes connected to the suction holes (7) of the drum (2)
(39) is formed. The depth (axial length) of the pocket (38) is deeper than the thickness of the tablet (T), and the outer diameter of the bottom surface (38b) is approximately equal to or slightly smaller than the outer diameter of the tablet (T). .. Also, the pocket on the surface (37a) of the block (37)
The area around (38) is machined to diffusely reflect light,
It is formed on the rough surface by chemical treatment.

The remaining part of the second embodiment is the same as that of the first embodiment, though not shown.

In the second embodiment, the first front surface of the tablet (T)
The surface inspection of (18) is performed in the same manner as in the case of the first embodiment. The tablet (T) that has been inspected on the first front face (18) is moved from the pocket of the first drum to the reflector block (37) of the second drum (2).
In the pocket (38), and the second front surface (19) is vacuum suction-held in the suction hole (39) so that the second front surface (19) faces outward and is rotated together with the drum (2). At this time, since the pocket (38) has a tapered hole shape in which the outer peripheral surface side of the drum (2) is widened, the tablet (T) is surely transferred into the pocket (38), and moreover, is placed on the bottom of the pocket (38). Accurately positioned. Tablet (T) is the second drum
While being held in the pocket (38) of the block (37) of (2) and being rotated, the second front face (19) of the second television camera (16) and the second television camera (16) are rotated as in the case of the first embodiment. A part of the reflection surface (38a) of the pocket (38) is imaged, and the video signal thereof is processed by the second image processing device, so that the second front surface (19) and the side surface (20).
Surface inspection is performed. The light emitted from the side surface (20) of the tablet (T) is reflected by the reflection surface (38a) of the pocket (38) and goes out.
Therefore, as shown in FIG. 8, on the screen imaged by the second television camera (16), the image of the second front surface (19) of the tablet (T) at the center (G19) is displayed as in the case of the first embodiment. ), The image (G38) of the reflective surface (38a) of the surrounding pocket (38), and the image (G38)
An image (G20) of the entire circumference of the side surface (20) of the tablet (T) appears. The subsequent processing is the same as in the case of the first embodiment.

In the case of the second embodiment, the pocket (38) and the reflecting surface (38a) of the reflecting mirror constituting the reflecting means are formed on the reflecting mirror block (37) attached to the outer peripheral portion of the drum (2). Therefore, if the size of the tablet (T) to be inspected changes, it can be easily dealt with by replacing the block (37). However, the reflecting surface of the reflecting mirror may be formed by forming a pocket directly on the outer peripheral portion of the drum (2).

FIG. 9 shows a third embodiment.

The third embodiment is for inspecting the upper surface and two side surfaces of a rectangular parallelepiped electronic component, and FIG. 9 shows the overall schematic construction of a surface inspection apparatus.

The surface inspection apparatus is equipped with a conveyor (22) for conveying the electronic parts (P) one by one in the direction of the arrow. In addition,
In the description of the third embodiment, the upper and lower sides refer to FIG.
The front, back, left and right shall refer to the transport direction of electronic parts (P).

Straight rectangular prisms (reflecting means) (23) are arranged in parallel with the conveyor (22) on both left and right sides of the conveyor (22) at predetermined locations. These prisms (23)
The right-angled surface (23a) faces the left and right side surfaces (24) of the electronic component (P) on the conveyor (22), and the second right-angled surface (23b) faces upward.

A television camera (two-dimensional image pickup device) (25) is arranged downward just above the portion of the conveyor (22) where the prism (23) is provided, and its video signal is input to the image processing device (26). It is supposed to do.

When the electronic component (P) moves directly under the television camera (25), it is detected by an appropriate detection means such as a photoelectric switch (not shown), and the electronic component (P) is detected by the television camera (25). An image of the second right-angled surface (23b) of the prism (23) is imaged.

The light emitted from the side surface (24) of the electronic component (P) is the first
Pass through the right-angled surface (23a) and enter the prism (23).
After reflecting at 3c), go out through the second right-angled surface (23b). Therefore, the image of the top surface (27) of the electronic component (P) is in the center of the screen imaged by the TV camera (25), and the second right-angled surface (23b) of the prism (23) and the electronic component (P) are on both sides of the image. Left and right sides of
The image of (24) appears. Then, the image processing device (26) processes the video signal of the television camera (25) to inspect the upper surface (27) and the left and right side surfaces (24) of the electronic component (P).

10 and 11 show the fourth embodiment.

In the fourth embodiment, similar to the third embodiment, the upper surface (27) of the rectangular parallelepiped electronic component (P) and the left, right, front, and rear 4 parts are used.
One side surface (24) (28) is inspected, and FIG. 10 shows the overall schematic structure of the surface inspection apparatus. The fourth
In the description of the embodiment, the upper and lower sides refer to FIG. 10, and the front and rear sides and the left and right sides refer to the conveying direction of the electronic component (P). The same parts as those in the third embodiment are designated by the same reference numerals.

The conveyor (22) is provided with projection stands (29) at equal intervals in the front and rear, and the electronic parts (P) are placed on these stands.
It is placed on (29) and sent forward with the surface of the conveyor (22) slightly elevated.

A photoelectric switch (30) is provided on a side of the conveyor (22) at a predetermined position, and a rectangular annular prism (reflecting means) (31) is arranged vertically above the conveyor (22) in this part. Has been done.

The prism (31) is composed of four linear right-angle prisms as used in the third embodiment. The first right-angled surfaces face inward at right angles to each other, and the second right-angled surfaces all meet. It is formed in a ring shape by connecting as described above. The inside of the first right-angled surface (31a) is the electronic component (P).
It has a straight hole (32) with a rectangular cross section to accommodate the. In the prism (31), the first right-angled surface (31a) is parallel to the four side surfaces (24) (28) of the electronic component (P) on the conveyor (22), and the second right-angled surface (31b) is directly above. The air cylinder (33) is hung on its right and left sides. The prism (31) is expanded and contracted by the cylinder (33), so that
It can be moved up and down between the inspection position just above the conveyor (22) shown in FIG. 1 and the standby position separated from the conveyor (22) shown in FIG.

The television camera (25) is arranged right above the prism (31) and faces downward.

While the electronic component (P) is being moved by the conveyor (22), the prism (31) rises to the standby position and stands by. When the electronic component (P) on the conveyor (22) moves directly under the prism (31), this is detected by the photoelectric switch (30), and the detection signal causes the conveyor (2) to move.
2) is stopped.

When the conveyor (22) stops, the prism (31)
Is lowered to the inspection position and the electronic parts are in a stopped state (P)
Enters the hole (32) of the prism (31). In such a state, the electronic camera (P) and the prism (3
The part of the second right-angled surface (31b) of 1) is imaged.

The light emitted from the side surfaces (24) and (28) of the electronic component (P) passes through the first right-angled surface (31a) into the prism (31), is reflected by the reflection surface (31c), and is then reflected. Go up through 2 right-angled planes (31b). Therefore, the image of the upper surface (27) of the electronic component (P) is centered on the screen imaged by the television camera (25), and the second right-angled surface (31b) of the prism (31) and the electronic component (P) are surrounded by the image. Images of the four sides (24) (28) of And the image processing device
By processing the video signal of the TV camera (25) at (26), the top surface (27) of the electronic component (P) and the left and right and front and rear side surfaces (2
4) (28) is inspected.

[0088]

According to the article surface inspection method of the present invention, the front and side surfaces of the article to be inspected can be simultaneously imaged and inspected by one image pickup device, and the cost of the surface inspection can be greatly reduced. is there.

By disposing an annular prism around the side surface of the inspected article so as to surround the inspected article, one image pickup device can simultaneously image and inspect the entire front and side surfaces of the inspected article. You can

If the annular prism is constructed by combining a plurality of parts divided in the circumferential direction, the prism can have a shape suitable for the article to be inspected.

By arranging a plurality of prisms around the side surface of the article to be inspected at intervals in the circumferential direction, it is possible to inspect only a desired portion of the side surface of the article to be inspected.

If the reflecting means is a reflecting mirror having a reflecting surface formed of a concave conical surface, it is possible to simultaneously inspect and inspect the entire front and side surfaces of the article to be inspected arranged inside the reflecting surface with one image pickup device. You can

According to the surface inspection apparatus for articles of the present invention,
It is possible to simultaneously image and inspect the front surface and the side surface of the article to be inspected by one imaging device, and it is possible to reduce the size of the surface inspection device and significantly reduce the cost.

If the prism is an annular one arranged around the side surface of the inspected article so as to surround the inspected article, the front surface and the entire side surface of the inspected article can be simultaneously imaged by one imaging device. Can be inspected.

If the annular prism is formed by combining a plurality of parts divided in the circumferential direction, the prism can have a shape suitable for the article to be inspected.

If a plurality of prisms are arranged around the side surface of the article to be inspected at intervals in the circumferential direction, it is possible to inspect only a desired portion of the side surface of the article to be inspected.

If the reflecting means is a reflecting mirror having a reflecting surface composed of a concave conical surface, the front and side circumferences of the article to be inspected arranged inside the reflecting surface are simultaneously imaged and inspected by a single image pickup device. be able to.

According to the surface inspection prism for articles of the present invention, it becomes possible to simultaneously inspect and inspect the entire front and side surfaces of the article to be inspected by one image pickup device, and the surface inspection apparatus can be made compact and compact. Significant cost reduction is possible.

If the prism is formed in an annular shape by combining a plurality of portions divided in the circumferential direction, the prism can have a shape suitable for the article to be inspected.

According to the reflecting mirror block for surface inspection of the present invention, the light emitted from the entire circumference of the side surface of the article to be inspected, which is accommodated in the pocket having the circular tapered hole shape, is reflected by the reflecting surface composed of the concave conical surface of the article to be inspected. Since the light can be reflected to the front side, it is possible to simultaneously image and inspect the entire front and side circumferences of the article to be inspected by one imaging device.

According to the rotary drum for surface inspection of the article of the present invention, it becomes possible to simultaneously inspect and inspect the entire front and side surfaces of the article to be inspected, which is rotating together with the rotary drum, by one imaging device. The surface inspection device can be downsized and the cost can be significantly reduced.

If the annular prism is formed by combining a plurality of portions divided in the circumferential direction, the prism can have a shape suitable for the article to be inspected.

Further, according to the surface inspection rotary drum of the present invention, the object to be inspected can be easily positioned and accommodated in the pocket having the circular tapered hole shape, and the entire side surface of the object to be inspected accommodated in the pocket is accommodated. Light emitted from the circumference can be reflected to the front side of the inspected article by the reflecting surface formed of the concave conical surface, and therefore, the entire front and side circumferences of the inspected article rotating together with the rotating drum are integrated into one imaging device. It is possible to take an image and inspect at the same time.

If a plurality of reflecting mirror blocks are attached to the outer peripheral surface of the rotating drum and a pocket and a reflecting surface are formed in each reflecting mirror block, the reflecting mirror block is replaced when the size of the inspection object is changed. This can be dealt with easily.

[Brief description of drawings]

FIG. 1 is a schematic partial cutaway side view of a tablet surface inspection apparatus showing a first embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing a pocket portion of a second rotary drum of the first embodiment in an enlarged manner.

FIG. 3 is a perspective view of an annular prism of the first embodiment.

FIG. 4 is a diagram showing an example of an image of a second television camera of the first embodiment.

FIG. 5 is a perspective view showing a modified example of an annular prism.

FIG. 6 is a partially cutaway enlarged side view of a part of the outer circumference of the second rotary drum showing the second embodiment of the present invention.

FIG. 7 is a perspective view of a reflecting mirror block according to a second embodiment.

FIG. 8 is a diagram showing an example of an image of a second television camera of the second embodiment.

FIG. 9 is a schematic perspective view of a surface inspection device for electronic parts showing a third embodiment of the present invention.

FIG. 10 is a schematic perspective view of a surface inspection device for electronic parts showing a fourth embodiment of the present invention.

FIG. 11 is an enlarged vertical sectional view showing a portion of the annular prism at the inspection position of the fourth embodiment.

[Explanation of symbols]

 (2) Second rotating drum (5) Pocket (8) Annular prism (reflecting means) (9) Hole (16) Television camera (two-dimensional imaging device) (17) Image processing device (18) First front face (19) ) Second front surface (20) Side surface (21) Half body (23) Right angle prism (reflecting means) (24) Side surface (25) Television camera (two-dimensional imaging device) (26) Image processing device (27) Top surface (28) Side (31) Annular prism (Reflecting means) (32) Hole (37) Reflector block (Reflecting means) (38) Pocket (38a) Reflecting surface (P) Electronic component (T) Tablet

Claims (19)

[Claims] 1. A reflection means for reflecting the light emitted from the side surface of the article to be inspected to the front side of the article to be inspected is arranged so as to face the side surface of the article to be inspected, and is emitted from the front and the reflection means of the article to be inspected. A surface inspection method for an article, which inspects the front and side surfaces of an article to be inspected by processing the imaged light with a two-dimensional imaging apparatus and processing a video signal from the two-dimensional imaging apparatus. 2. The surface inspection method for an article according to claim 1, wherein the reflecting means is a prism. 3. The surface inspection method for an article according to claim 2, wherein an annular prism is arranged around a side surface of the article to be inspected so as to surround the article to be inspected. 4. The surface inspection method for an article according to claim 3, wherein the annular prism is constituted by combining a plurality of portions divided in the circumferential direction. 5. The surface inspection method for an article according to claim 2, wherein a plurality of prisms are arranged around the side surface of the article to be inspected at intervals in the circumferential direction. 6. The surface inspection method for an article according to claim 1, wherein the reflecting means is a reflecting mirror having a reflecting surface formed of a concave conical surface. 7. Reflecting means arranged to face the side surface of the article to be inspected and reflecting light emitted from the side surface of the article to be inspected to the front side of the article to be inspected, and to face the front and reflecting means of the article to be inspected. And a two-dimensional image pickup device for picking up light emitted from the front surface of the article to be inspected and the reflecting means, and 2
A surface inspection apparatus for an article, comprising an image processing apparatus for inspecting a front surface and a side surface of an article to be inspected by processing a video signal from a three-dimensional image pickup apparatus. 8. The surface inspection apparatus for an article according to claim 7, wherein the reflecting means is a prism. 9. The surface inspection apparatus for an article according to claim 8, wherein the prism is an annular member arranged around the side surface of the article to be inspected so as to surround the article to be inspected. 10. The surface inspection device for an article according to claim 9, wherein the annular prism is constituted by combining a plurality of portions divided in the circumferential direction. 11. The surface inspection apparatus for an article according to claim 8, wherein a plurality of prisms are arranged circumferentially around the side surface of the article to be inspected. 12. The surface inspection apparatus for an article according to claim 7, wherein the reflecting means is a reflecting mirror having a reflecting surface formed of a concave conical surface. 13. A prism for inspecting a surface of an article, which has an annular shape and is provided with a hole for accommodating an article to be inspected. 14. The prism for surface inspection of an article according to claim 13, which is formed in an annular shape by combining a plurality of portions divided in the circumferential direction. 15. A reflector block for surface inspection of an article, wherein a pocket having a circular tapered hole shape for accommodating an object to be inspected is formed, and a reflection surface made of a concave conical surface is formed on an inner circumference of the pocket. 16. A rotary drum for surface inspection of an article, wherein a plurality of pockets are formed on an outer peripheral surface, and an annular prism having a hole for accommodating the article to be inspected is attached in each pocket. 17. A rotary drum for surface inspection of an article according to claim 16, wherein the annular prism is formed by combining a plurality of portions divided in the circumferential direction. 18. A surface inspection rotation for an article, wherein a plurality of circular tapered hole-shaped pockets for accommodating an object to be inspected are formed on an outer peripheral surface, and a reflective surface formed of a concave conical surface is formed on an inner periphery of the pockets. drum. 19. A rotary drum for surface inspection of an article according to claim 18, wherein a plurality of reflecting mirror blocks are attached to the outer peripheral surface, and each reflecting mirror block is provided with a pocket and a reflecting surface.