JP2775417B2 - In-can inspection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can for judging the quality of a drum or the like by examining, for example, rust generated on the inner surface of a drum, foreign matters adhering to the inner surface, and remaining liquid such as oil or water. It relates to an internal inspection device.

[0002]

2. Description of the Related Art A conventional in-can inspection apparatus of this type is disclosed in Japanese Patent Publication No. 5-81013. The conventional device includes a fiberscope that allows a lower end to be inserted into the can through an entrance formed in a top plate of the can, and a prism that is rotatably attached to the lower end of the fiberscope. The field of view is changed by rotating the prism in a predetermined direction so that the entire inside of the can can be inspected through a fiberscope.

[0003]

However, in the above-mentioned conventional apparatus, since the quality is determined based on the subjectivity of a person who inspects the inner surface of the can, the criterion is ambiguous. further,
For example, in a series of automatic regeneration process and automatic new can manufacturing process, when trying to judge the quality of continuously regenerated or newly manufactured cans continuously, it is necessary to frequently rotate the prism and take in and out the fiber scope. However, there are drawbacks in that it takes time and effort, and it is not possible to efficiently determine the quality.

Accordingly, the present invention provides a method for inspecting the inner surface of a can,
An object of the present invention is to provide an in-can inspection apparatus capable of automatically and efficiently determining the quality.

[0005]

According to the present invention, there is provided an impact applying member 21 for applying an impact to a bottom plate Db of a can D so as to generate ripples and splashes in the liquid remaining in the can D; The photographing units 34 and 36 for photographing the image, the moving mechanism units 35 and 49 for moving the inside and outside of the can D through the entrances Dd and De formed in the top plate Dc, and the reference image in the can as a criterion of the quality. And a quality judgment unit 52b for judging the quality by comparing the photographed image in the can D photographed by the photographing units 34 and 36 with the reference image. The pass / fail determination unit 52b is configured to capture a photographed image in the can D before the impact is applied to the bottom plate of the can D to be subjected to the pass / fail determination by the impact applying member 21 and the inside of the can D after the impact is applied to the bottom plate Db. The photographed image is compared with the reference image to determine the quality.

[0006]

Embodiments of the present invention will be described with reference to the drawings. The in-can inspection apparatus according to the present invention includes
A drum can mounting portion A disposed at the lower part of the frame 1, an in-can inspection portion B disposed at an intermediate portion of the machine frame 1, and a control portion C disposed at a distance from the machine frame 1 (FIG. 1). .

The machine casing 1 has four standing frames 2 to 5 arranged so as to form square vertices, and a horizontal frame 6 to 9, 10 between an intermediate portion and an upper portion thereof.
13 and a horizontal frame 14 is provided between the horizontal frames 6 and 8 facing each other between the intermediate portions.

The drum mounting portion A is provided on a support base 15 having a front upright plate 15a and a rear upright plate 15b formed in parallel with each other.
And four drum mounting rollers 16 to 19 rotatably arranged between the upper edges of the front-side upright plate 15a and the rear-side upright plate 15b, and the drum cans to be determined mounted on these rollers. It comprises a can positioning portion 20 for positioning D and an impact applying member 21 (FIG. 3).

Each of the drum mounting rollers 16 to 19 is driven to rotate by a motor (not shown), and the drums D mounted thereon are transferred to the drum mounting rollers 16 to 19.
It can be moved in 19 arrangement directions.

The positioning portion 20 includes a movable stopper 23 slidable along two slide rails 22, 22 arranged between the front upright plate 15a and the rear upright plate 15b of the support base 15. A fixed stopper 24 fixed to the inner surface of the front upright plate 15a so as to face the movable stopper 23.
And a positioning fluid pressure cylinder 25 disposed between the movable and fixed stoppers 23 and 24 (FIG. 3).

The movable stopper 23 is provided on the slide rail 2.
It comprises a horizontal rectangular substrate 26 fitted to the substrates 2 and 22, and contact rollers 27 protruding from both ends of the substrate 26 toward the body Da of the drum D and supported.

The fixed stopper 24 is composed of a substrate 28 fixed to the inner surface of the front upright plate 15a, and contact rollers 29, 29 protruding and supported on both ends of the substrate 28 toward the body Da of the drum D. Become.

The impact applying member 21 applies an impact to the bottom plate Db of the drum D so as to generate ripples and splashes in the liquid such as water or oil remaining in the drum D. Pressure cylinder (FIG. 3).
That is, when water, oil, or the like remains in the drum D, the impact is applied to the bottom plate Db to cause ripples or splashes on the water, oil, or the like. Part 3
4, 36 can be taken.

In the drum mounting section A having the above structure, the rod 25a of the positioning fluid pressure cylinder 25 is extended,
The gap between the movable stopper 23 and the fixed stopper 24 is largely opened, and the drum D is moved between them. Thereafter, when the rod 25a of the positioning fluid pressure cylinder 25 is retracted, the drum D moves to the fixed stopper 24 along with the movement of the movable stopper 23, and is positioned at a predetermined position.

The in-can inspection section B is configured such that the drive rod 30a faces downward and the cylinder body 3 is mounted on the horizontal frame 14.
The air-hydraulic cylinder 30 has an air-hydro cylinder 30 fixed thereto, and an elevating gantry 31 which is fixed to the driving rod 30a thereof and which is moved up and down while maintaining a horizontal state.

A top plate detection sensor S for stopping the lift frame 31 at a position close to the top plate Dc of the drum D
And two large and small clamping mechanisms 32 and 33 for clamping the large-diameter entrance Dd and the small-diameter entrance De formed on the top plate Dc of the drum D, respectively, and the inside of the can through the entrance Dd. A first elevating mechanism 35 for moving the first photographing unit 34 in and out, and a second elevating mechanism 37 for moving the second photographing unit 36 in and out of the can through a small-diameter doorway De are mounted. Have been.

The large clamp mechanism 32 includes a fixed clamp 3
2a, a movable clamp 32b which clamps the base of the entrance Dd therebetween, and a fluid pressure cylinder 38 which drives the movable clamp 32b to open and close. As in the case of the large clamp mechanism 32, the small clamp mechanism 33 includes a fixed clamp 33a, a movable clamp 33b for clamping the mouthpiece De between the fixed clamp 33a, and a fluid pressure cylinder 39 for opening and closing the movable clamp 33b. Consists of

The first elevating mechanism 35 has a long supporting member 40 whose lower end is rotatably supported by the elevating gantry 31, and the long supporting member 40 is tilted about its lower end 40a. A hydraulic cylinder 41 for tilting and a hydraulic cylinder 42 for lifting and lowering fixed along the long support member 40.
A photographing unit supporting rod 43 which is moved up and down by driving the lifting hydraulic cylinder 42; and a turning hydraulic cylinder (not shown) for rotating the photographing unit supporting rod 43 within a predetermined angle range. The first photographing unit 34 is fixed to the lower end of the photographing unit support rod 43.

The first photographing section 34, as shown in FIG.
For example, a transparent cylindrical case 45 made of vinyl chloride resin or the like
Inside, a fluorescent lamp 46 and a CCD (Charge
Coupled Device) 47 and the like are hermetically sealed. The CCD 47 is disposed so as to intersect with the long axis of the cylindrical case 45. When the first photographing unit 34 is inserted into the drum D, the inner surface of the top plate Dc and the inner surface of the trunk Da of the drum D are provided. You can shoot almost the upper half of the camera.

In the first elevating mechanism 35, the first photographing unit 34 is set to a standby position (a) where the first photographing unit 34 is kept above the entrance Dd of the drum D, and the first photographing unit 34 is moved downward by a predetermined distance via the entrance Dd. With the moved first photographing position (b) and the first photographing unit 34 moved to the first photographing position (b),
The long support member 40 can be moved to a second photographing position (C) in which the long support member 40 is inclined at a predetermined angle (FIG. 1).

The second lifting mechanism 36 comprises a supporting member 48 erected on the lifting base 31 and a lifting / lowering fluid pressure cylinder 49 with a cylinder 49b fixed with the drive rod 49a facing downward. The second imaging unit 36 composed of the CCD 47 is fixed to the lower end of the imaging unit support rod 50 connected to the driving rod 49a.

In the second lifting mechanism 36, the second photographing unit 36 is moved from the standby position (d) where the second photographing unit 36 is standby above the entrance De of the drum D to the entrance De from the standby position (d). It can be moved to a third shooting position (e) vertically lowered into the drum D by a predetermined distance via the camera (FIG. 1). When the second photographing unit 36 is inserted into the drum D, the lower half and the bottom inner surface of the drum inner surface of the drum D can be photographed.

The first photographing unit 34 and the second photographing unit 3
6 may be configured such that when they are inserted into the drum D, only a part of the area inside the drum D can be photographed, or the boundary between the two photographing areas overlaps. May be set so that there is no blind spot in the photographing area in the drum D.

The control section C includes a sequence controller 51 for controlling the operation of the entire apparatus, an image recognition section 52, a color CRT 53 for displaying images photographed by the first and second photographing sections 34 and 36, and will be described later. It has a monochrome CRT 54 for displaying a reference image and an operating device 55 (FIG. 6).

The image recognizing unit 52 stores a reference image serving as a criterion for determining whether the image is good or bad, the respective images taken on the inner surface of the drum D and sent from the first and second photographing units 34 and 36, and A quality judgment unit 52b for judging the quality of the drum D by comparing with the reference image.

The reference image has the same shape as that of the drum D to be judged, and a beautiful drum that can be used as a reference is photographed at the first to third photographing positions (b), (c), and (e). The captured image at the position is stored in the storage unit 52a in advance.

The pass / fail judgment unit 52b includes a reference image at the first photographing position (b) and a drum can D to be judged as pass / fail.
The quality of the drum can D is determined by comparing the actual photographed image at the same photographing position (b) with the reference image at the first and third photographing positions (b) and (e). Alternatively, the quality of the drum D may be determined by comparing both of the actual captured images of the drum D at the same shooting positions (B) and (E).

That is, the pass / fail judgment unit 52b determines whether 1 or 2
The quality of the drum can D, which is a quality determination target, is determined by comparing the above-described reference images with the actually captured images corresponding to these.

After comparing the photographed image at each photographing position with the reference image, a shock is applied to the bottom plate Db of the drum D by the shock applying member 21, and thereafter, the photographed image at each photographing position and the reference image are again compared. Are compared to determine the quality of the drum D. In other words, the quality determination unit 52b determines whether the impact imparting member 21 determines the quality of the drum D
A photographed image of the inner surface of the can before giving an impact to the bottom plate Db of
And a photographed image in the can after applying an impact to the bottom plate Db,
Each of them is compared with the reference image to determine the quality.

Further, based on the above determination result, the monochrome C
A message such as "pass", "fail", "attached foreign matter", or "oil or moisture remains" is displayed on the RT 54.

Next, the operation of the present apparatus will be described. When the drum can D to be judged as good or bad is positioned on the drum can mounting portion A, the elevating gantry 31 is moved downward. Stop.

Next, both the mouthpieces Dd and De of the drum D are clamped by the large and small clamp mechanisms 32 and 33. In this clamped state, the first photographing unit 34 is inserted into the drum D via the entrance Dd, and is moved to the first photographing position (b). The second photographing unit 36
Is inserted into the drum D via the entrance De, and is moved to the third shooting position (e).

At each of the photographing positions, the inside of the drum D is photographed by the first and second photographing units 34 and 36, respectively. After the photographing, each photographed image is sent to the image recognition unit 52 of the control unit C, and the state inside the drum D is also displayed on the color CRT 53.

When the above photographing is completed, the impact applying member 21
As a result, an impact is applied to the bottom plate Db of the drum D. Immediately after this, the second imaging by the first and second imaging units 34 and 36 is performed. That is, when water, oil, or the like remains in the drum D, an impact is given to the bottom plate Db,
Ripples and splashes occur in water, oil, and the like, which can be captured by the second photographing.

The two captured images are temporarily stored, and each of the captured images is compared with the reference image. First, the first captured image is compared with the reference image. In this first comparison, it is possible to detect the contamination on the inner surface of the drum D, the presence or absence of foreign matter, and the like. Then, at this stage, those which can be determined to be defective are processed as defective without performing the second photographing. At this time, a message such as "There is dirt or foreign matter attached" or "Fail" is displayed on the color CRT 53.

A second comparison is carried out for a product determined to be non-defective by the first comparison. At this time, drum D
If liquid such as water or oil remains inside the drum D, the ripples and splashes generated by the second imaging can be detected, and the drum D is treated as defective. When it is determined that the product is defective in the second comparison, a message such as "water or oil remains" is displayed on the color CRT 53. When it is determined that the product is non-defective, a message such as “pass” is displayed on the color CRT 53.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the invention. The impact applying member may be provided at a position at which an impact is applied to the bottom plate of the can or at a position at which an impact is applied to the top plate, the body, or the like.

[0038]

According to the present invention, an impact applying member for applying an impact to the bottom plate of the can so as to generate ripples and splashes in the liquid remaining in the can, an imaging section for photographing the inside of the can, A moving mechanism for moving this inside and outside of the can through the entrance,
An image storage unit that stores a reference image in the can serving as a criterion of pass / fail, and a pass / fail judgment unit that performs pass / fail judgment by comparing the photographed image in the can and the reference image photographed by the photographing unit. As a result, it is possible to automatically and efficiently judge the acceptability as well as the inspection inside the can.

Further, since a shock is applied to the bottom plate of the can by the impact applying member to cause ripples and splashes in the liquid such as water or oil remaining in the can, it is determined whether or not the liquid remains in the can. Can be determined.

[Brief description of the drawings]

FIG. 1 is a front view of a mechanical system of an in-can inspection apparatus of the present invention.

FIG. 2 is a side view of the device.

FIG. 3 is a sectional view taken along line II of FIG. 1;

FIG. 4 is a sectional view taken along line II-II in FIG.

FIG. 5 is an enlarged sectional view showing details of a first photographing unit.

FIG. 6 is a block diagram illustrating a configuration of a control unit.

[Explanation of symbols]

 21 Shock giving member 34, 37 Imaging section 35, 49 Moving mechanism section 52a Image storage section 52b Quality judgment section D Drum can Db Bottom plate Dc Top plate Dd, De Doorway

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-7-286971 (JP, A) JP-A-63-113416 (JP, A) JP-A-60-179852 (JP, U) (58) Investigation Field (Int.Cl. ⁶ , DB name) G01N 21/90 G01N 21/88

Claims (2)

(57) [Claims] 1. An in-can inspection apparatus for determining the quality of a can having an entrance formed in a top plate, wherein the liquid remaining in the can has ripples and splashes on a bottom plate of the can. An impact applying member that gives an impact, a photographing unit that photographs the inside of the can, a moving mechanism that moves the inside and outside of the can through the entrance, and an image storage unit that stores a reference image of the inside of the can that serves as a criterion of quality. An in-can inspection device, comprising: a good / bad determination unit that compares a captured image of the inside of the can captured by the imaging unit with the reference image to determine the quality. 2. The image quality determination unit includes: a photographed image in the can before being subjected to a shock by the impact imparting member on the bottom plate of the can, and a photograph in the can after the shock is applied to the bottom plate. The in-can inspection apparatus according to claim 1, wherein each of the images is compared with a reference image to determine a quality.