JP2000131246A - Inspecting device for resin moldings - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and highly precisely inspect confirmation for a stain or a black trace deposited in a bottomed resin molding having an opening in its upper end such as a food container, without depending on a direct visual observation by a worker. SOLUTION: A bottomed resin molding 7 having an opening in its upper end on an inspecting table 1 is irradiated with light from a light emitting means 2, and a mirror face 3 is turned inside the resin molding 7 by a miror face positioning means 4 to reflect its inner face. An image of the inner face reflected by the mirror face 3 is photographed by a photographing means 5, and the photographed image is processed according to prescribed electrical processing to display an image same to the photographed image on an image displaying means 6 for confirmation. On the other hand, the mirror face 3 is retreated from the inside of the resin molding 7, an image of a bottom is photographed by the photographing means 5, and the photographed image is processed according to prescribed electrical processing to display an image same to the photographed image on the display means 6 for confirmation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded product having a top opening and a bottom formed by a resin molding machine, and more particularly to a resin molding suitable for inspection of a resin molded product having a top opening and a bottom used as a food container. The present invention relates to a product inspection device.

[0002]

2. Description of the Related Art In general, food containers having a transparent, translucent, white or white bright appearance are often used so that the filled state of food can be visually recognized, and a clean feeling is required. Further, if dirt is attached to the container, use is restricted from a sanitary viewpoint. Furthermore, if a black spot phenomenon (a black mark like a burned resin) occurs on a product during molding, the appearance of the food container will be impaired and a dirty feeling will be given. Is also limited.

[0003] For this reason, conventionally, inspections have been made to confirm dirt or black traces adhering to the inner surface and the bottom surface of a food container by direct visual inspection by an operator.

[0004]

In a conventional inspection method that relies on the visual inspection of an operator, extremely complicated work is required for a long time. This places a heavy burden on the operator. In addition, there is a drawback that inspection accuracy tends to vary due to individual differences among workers, and high-precision inspection results cannot be expected. Reducing the burden on the operator and obtaining high-precision inspection results can be cleared by using existing optical inspection devices. However, the existing optical inspection apparatus requires complicated facilities and expensive equipment, and also requires skilled operation skills.

[0005] Therefore, the present invention provides a method for mechanically checking a stain or a black trace adhering to a resin molded product having a bottom opening at the upper end, such as a food container, without relying on the operator's direct visual observation. In addition to reducing the burden on the operator and eliminating variations in inspection accuracy due to individual differences between workers, high-precision inspection results can always be expected, and the price is lower than existing optical inspection equipment. It is another object of the present invention to provide a resin molded product inspection apparatus capable of confirming a stain or a black trace by a simple operation that does not require skilled operation skills.

[0006]

According to a first aspect of the present invention, there is provided an apparatus for inspecting a resin molded product, wherein the resin molded product having an upper end opening and a bottom is formed by a resin molding machine. Or, an inspection table that is sequentially placed manually, light irradiation means for irradiating light to the resin molded article placed on the inspection table, and a bottom surface of the resin molded article irradiated by the light irradiation means A mirror surface for reflecting the inner and outer surfaces excluding the above, mirror surface positioning means for holding the mirror surface and positioning the inner and outer surfaces of the resin molded product at a position where projection of the inner and outer surfaces is possible, and an image of the inner and outer surfaces reflected on the mirror surface and the light irradiating means Image capturing means for capturing an image of the bottom surface illuminated in the above, and image display means for displaying the state of the inner and outer surfaces and the bottom surface of the resin molded article based on a signal output from the capturing means. Features.

In the inspection apparatus for a resin molded product according to the second aspect of the invention, the inspection table is configured to be unable to rotate around a vertical axis.

Further, in the inspection apparatus for a resin molded product according to the present invention, the inspection table is configured to be rotatable about a vertical axis by a rotating means.

According to the first aspect of the present invention, when the resin molded article with the upper end opening is sequentially or automatically placed on the inspection table, light is irradiated from the light irradiation means to the resin molded article with the upper opening. Irradiated. The mirror surface enters the inside of the bottomed resin molded product by the mirror surface positioning means and turns to reflect the inner surface of the bottomed resin molded product. The image of the inner surface reflected on the mirror surface is photographed by photographing means.

[0010] The photographed image is subjected to predetermined electrical processing, and the same image as the photographed image is displayed on the image display means. Thereby, the inner surface of the resin molded product having the upper end opening and the bottom can be confirmed. In other words, when the resin molded product with the bottom opening at the upper end is square, it is possible to confirm the inner surface of each of the plurality of standing walls. Can be confirmed.

On the other hand, the mirror surface is retracted from the inside of the bottom-opened resin molded product by the mirror positioning means in a state where the light irradiation means irradiates the bottom-opened resin molded product with light, whereby the top-opened bottomed resin product is irradiated. An image of the bottom surface of the molded article is photographed by the photographing means.

The photographed image is subjected to predetermined electrical processing, and the same image as the photographed image is displayed on the image display means. Thereby, the bottom surface of the resin molded product with the upper end opening and the bottom can be confirmed.

According to the second aspect of the present invention, when the resin molded article having the upper end opening is transparent or translucent, the operation of the invention according to the first aspect allows the resin molded article having the upper end opening to be formed. Both the inside and outside surfaces of the entire vertical wall and the inside and outside surfaces of the bottom wall can be simultaneously photographed and confirmed.

According to the third aspect of the present invention, when the resin molded article having the upper end opening is opaque, the entire periphery of the standing wall in the resin molded article having the upper end opening is formed by the operation of the invention described in the first aspect. The inner surface and the bottom surface of the resin molded product can be photographed and confirmed, and the mirror surface is retracted from the inside of the resin molded product having the upper end opening by the mirror surface positioning means, and the mirror surface is positioned outside the standing wall of the resin molded product having the upper end opening. Then, by rotating the inspection table around the vertical axis by rotating means,
The outer surface of the entire vertical wall can be photographed and confirmed.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view showing an embodiment of an inspection apparatus for a resin molded product according to the present invention.
A light irradiating unit 2, a mirror surface 3, a mirror positioning unit 4, a photographing unit 5, and an image display unit 6 are provided.

The inspection table 1 is provided with a resin molded product 7 having an upper end opening formed by a resin molding machine, which is automatically or manually placed in sequence. The inspection table 1 suppresses undesired fine movements such as floating and swinging. It has a function of placing the open bottomed resin molded product 7 upward. In addition, it is installed so that rotation about the vertical axis is impossible.

The light irradiating means 2 is a normal light illuminating device for irradiating light to the resin molded article 7 having an open top and a bottom placed on the inspection table 1, and is capable of adjusting the light irradiation angle and illuminance. Have been.

The mirror surface 3 is formed of, for example, a commonly used glass mirror or a mirror obtained by buffing a stainless steel plate.

The mirror surface positioning means 4 is for holding the mirror surface 3 and positioning the mirror surface 3 at a position where projection of the inner surface of the resin molded product 7 having an open top is possible. A first slider 41 that moves up and down along the column 40;
A second slider 42 attached to the front surface of the first slider 42 and moving in the horizontal direction; a first servo motor 43 for moving the first slider 41 in the vertical direction; and a second servo motor 49 for moving the second slider 42 in the horizontal direction. A third servomotor 44 is mounted on the front surface of the second slider 42, and the output rotation of the third servomotor 44 is transmitted to a cylindrical driven pulley 46 via a timing belt 45. Lenses (not shown) are attached to both ends of the cylindrical driven pulley 46 in the axial direction, and serve as a filter.
The mirror surface 3 is connected to a cylindrical driven pulley 4 via an arm 47.
The arm 4 is suspended from the outer periphery of the lower end of the arm 6 shown in FIG.
7 can be adjusted.

The first servo motor 43, the second servo motor 49, and the third servo motor 44 are electrically connected to a control unit 8 having a servo motor controller. Therefore, it is started based on the control signal output from the control unit 8, raises and lowers the first slider 41, reciprocates the second slider 42 in the horizontal direction, and moves the cylindrical driven pulley 46 in the forward and reverse directions. The mirror surface 3 is turned in the forward and reverse directions.

The photographing means 5 functions as an image input unit, and is constituted by a camera.

The image display means 6 is electrically connected to the control unit 8, and the control unit 8 is electrically connected to the power supply 9. The power supply device 9 is connected to an AC power input connector 10 and is provided with a main power-on switch, a light irradiation switch of the light irradiation unit 2 and the like (not shown). Further, the control unit 8 includes the photographing unit 5
A signal input circuit for receiving an output signal of the photographing means 5, a processing circuit for processing a signal input to the signal input circuit, and an image display means for describing a signal passing through the processing circuit as described below. 6 is provided with an output circuit and the like.

The image display means 6 has a function of displaying an image on the inner surface and the bottom surface of the resin molded product 7 having an upper end opening based on a signal output from the control unit 8. In this embodiment, a CPU unit 60 and a display device 61 connected to the CPU unit 60 are provided. The CPU unit 60 has a function of storing an input signal in an internal storage medium or an external storage medium, and outputting the input signal to the display device 61.

In the above configuration, a transparent or translucent resin molded article 7 with a bottom opening having an upper end is automatically or manually placed on the inspection table 1. Light is irradiated from the light irradiating means 2 to the resin molded article 7 having an open top and a bottom. At this time, by the operation of the mirror surface positioning means 4, the mirror surface 3 reaches a position where the mirror surface 3 can enter the inside of the resin molded product 7 having the upper opening shown in FIG.

The first slider 41 is lowered by the activation of the first servo motor 43 of the mirror surface positioning means 4, so that the mirror surface 3 enters the inside of the resin molded article 7 having an upper end opening as shown in FIG. Then, the cylindrical driven pulley 46 is rotated about the longitudinal axis via the timing belt 45 by the activation of the third servomotor 44, and the arm 47 and the mirror surface 3 are rotated.
Is rotated 360 degrees around the longitudinal axis of the driven pulley 46.

As a result, as shown by the arrow in FIG.
The inner and outer surfaces of the resin molded product 7 with the upper end opening are reflected on the mirror surface 3.
The images of the inner and outer surfaces shown in FIG. 3 are transmitted through the inside of a cylindrical driven pulley 46 serving as a filter and photographed by the photographing means 5. More specifically, in the case where the resin molded product 7 having the upper end opening and the bottom is a rectangular shape as shown in the illustrated example, the inner and outer surfaces of each of the plurality of standing walls are sequentially reflected on the mirror surface 3 and the resin molded product having the upper end opening and the bottom is formed. When 7 is circular, the entire circumference of the inner and outer surfaces of the standing wall is sequentially reflected on the mirror surface 3, and these images are transmitted through the cylindrical driven pulley 46 and photographed by the photographing means 5.

The images of the inner and outer surfaces of the resin molded product 7 having an upper opening and a bottom taken by the photographing means 5 are input to the control unit 8 as electric signals, and the signals processed by the control unit 8 are transmitted to the CPU unit of the image display means 6. The data is input to the display device 60 and displayed as an image on the display device 61. In the display device 61, the same image reflected on the mirror surface 3 can be displayed as a still image at a certain moment or as a moving image that moves continuously. It is possible to confirm the stain adhered to the inner surface of the product 7 standing wall, the black spot phenomenon generated during molding, the stain adhered to the outer surface of the standing wall, the black spot phenomenon generated during molding, and the like.

When the inspection of the inner and outer surfaces of the resin molded article 7 having the upper end opening and bottom is completed, the first slider 41 is raised by the activation of the first servo motor 43 of the mirror positioning means 4,
The mirror surface 3 is retracted to the upper side of the resin molded product 7 having the bottom opening. Next, the second slider 42 is moved laterally by the activation of the second servo motor 49, and then the first slider 41 is moved.
Is lowered, and as shown in FIG. 4, the arm 47 and the mirror surface 3 are positioned outside the bottom-opened resin molded product 7 having an upper end.

As a result, images of the bottom surface (upper surface of the bottom wall) and the lower surface of the bottom wall of the resin molded product 7 having an upper end opening are photographed by the photographing means 5. The images of the upper surface of the bottom wall and the lower surface of the bottom wall of the resin molded product 7 having the upper end opening and taken by the photographing means 5 are input to the control unit 8 as electric signals, and the signals processed by the control unit 8 are displayed on the image display means 6. And is displayed as an image on the display device 61. The display device 61 displays the same image as the upper surface of the bottom wall and the lower surface of the bottom wall as a still image, and adheres to the bottom surface (upper surface of the bottom wall) or the lower surface of the bottom wall of the resin molded product 7 having the upper end opening. It is possible to confirm the stains occurring and the black spot phenomenon generated during molding.
Thereby, both the inner and outer surfaces of the entire periphery of the standing wall and the inner and outer surfaces of the bottom wall of the transparent or translucent top-opening bottomed resin molded product 7 can be simultaneously photographed and confirmed.

On the other hand, as shown in FIG. 5, the inspection table 1 is configured to be rotatable around a vertical axis by a rotating means 11. The rotating means 11 includes a fourth servomotor 11A and a driving pulley 11 fixed to an output shaft of the fourth servomotor 11A.
B, a rotating shaft 11D in the longitudinal direction supported rotatably by a bearing block 11C, a driven pulley 11E fixed to the rotating shaft 11D, a driving pulley 11B and a driven pulley 1B.
1E, the fourth servo motor 11A and the bearing block 11C
In addition to being installed on the upper surface of 1G, the center of the inspection table 1 is fixed to the upper end of the rotating shaft 11D so as to be able to rotate simultaneously. Further, the fourth servo motor 11A is electrically connected to the control unit 8 including the servo motor controller shown in FIG. Further, the relative angle θ1 between the mirror surface 3 and the arm 47 can be adjusted.

In the above configuration, the opaque upper-end-opening bottomed resin molded product 7 is automatically or manually placed on the inspection table 1 in FIG. Light is irradiated from the light irradiating means 2 to the resin molded article 7 having an open top and a bottom. At this time, by the operation of the mirror surface positioning means 4, the mirror surface 3 reaches a position where the mirror surface 3 can enter the inside of the resin molded product 7 having the upper end opening, that is, above the resin molded product 7 having the upper end opening.

First servo motor 4 of mirror positioning means 4
5, the first slider 41 is lowered, and the mirror surface 3 is turned to the bottomed resin molded product 7 as shown by the solid line in FIG.
Into the interior of the Next, the cylindrical driven pulley 46 is rotated about the vertical axis via the timing belt 45 by the activation of the third servomotor 44, and the arm 47 and the mirror surface 3 are turned 360 degrees about the vertical axis of the driven pulley 46.

As a result, the inner surface of the resin molded product 7 with the upper end opening is reflected on the mirror surface 3, and the image of the inner surface reflected on the mirror surface 3 is transmitted through the inside of the cylindrical driven pulley 46 serving as a filter. The image is taken by the means 5. Specifically, when the resin molded product 7 with the upper end opening and the bottom is a square shape as shown in the figure, the inner surfaces of the plurality of standing walls are sequentially reflected on the mirror surface 3,
In the case where the resin molded product 7 having an open top and a bottom is circular, the entire circumference of the inner surface of the standing wall is sequentially reflected on the mirror surface 3, and these images are transmitted through the cylindrical driven pulley 46 and photographed by the photographing means 5. Is done.

An image of the inner surface of the resin molded product 7 having an upper opening and a bottom taken by the photographing means 5 is input to the control unit 8 as an electric signal, and the signal processed by the control unit 8 is transmitted to the CPU unit 60 of the image display means 6. Is displayed on the display device 61 as an image. In the display device 61, the same image reflected on the mirror surface 3 can be displayed as a still image at a certain moment or as a moving image that moves continuously. The stain adhering to the inner surface of the product 7 standing wall and the black spot phenomenon generated during molding can be confirmed.

When the inspection of the inner surface of the resin molded article 7 having the upper end opening is completed, the first slider 41 of the mirror positioning means 4 is raised by the activation of the first servomotor 43 to move the mirror surface 3 to the resin having the upper opening. It is retracted above the molded product 7.
Next, the second slider 42 is moved laterally by the activation of the second servomotor 49, and then the first slider 41 is lowered, so that the arm 47 and the mirror surface 3 have upper end openings as shown by the two-dot chain line in FIG. It is positioned outside the bottom resin molded product 7.

As a result, an image of the bottom surface of the resin molded product 7 having an open top and a bottom is photographed by the photographing means 5. An image of the bottom surface of the resin molded product 7 with the upper end opening taken by the photographing means 5 is input to the control unit 8 as an electric signal, and the signal processed by the control unit 8 is input to the CPU unit 60 of the image display means 6. Is displayed as an image on the display device 61. In the display device 61, the same image as the bottom surface is displayed as a still image, and with this image, it is possible to confirm the dirt adhering to the bottom surface of the resin molded product 7 having the upper end opening and the black spot phenomenon generated during molding. .
Thereby, it is possible to photograph and confirm the inner surface and the bottom surface of the entire vertical wall of the resin molded product 7 having an opaque upper end opening and a bottom.

As shown by the two-dot chain line in FIG.
In a state where the mirror surface 3 is positioned outside the bottom-opened resin molded product 7 having the upper end opening, the relative angle θ1 between the mirror surface 3 and the arm 47 is appropriately adjusted. Next, by rotating the inspection table 1 about the vertical axis by the rotating means 11, the outer surface of the entire periphery of the standing wall of the resin molded product 7 having an opaque upper end opening can be photographed and confirmed. That is, the fourth servo motor 11A is started by an output signal from the control unit 8 including the servo motor controller shown in FIG. 2, and the rotation of the output shaft is transmitted through the transmission path of the driving pulley 11B → the timing belt 11F → the driven pulley 11E. By transmitting the rotation to the rotating shaft 11D and simultaneously rotating the rotating shaft 11D and the inspection table 1 around the vertical axis, the outer surface of the entire vertical wall can be photographed and confirmed.

[0038]

According to the present invention, dirt or black traces adhering to a food container can be automatically inspected without relying on the operator's direct visual inspection. The labor of the person can be reduced. Also,
Since the variation in the inspection accuracy can be suppressed, it is possible to execute a high-accuracy inspection and expect a high-accuracy result.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram at the time of an inner surface inspection.

FIG. 3 is an enlarged sectional view showing a relationship between a mirror surface and a resin molded product having an upper end opening and a bottom at the time of inner surface inspection.

FIG. 4 is an explanatory diagram at the time of bottom surface inspection.

FIG. 5 is a front view showing an example of a rotating unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inspection stand 2 Light irradiation means 3 Mirror surface 4 Mirror surface positioning means 5 Imaging means 6 Image display means 7 Resin molding with bottom opening 11 Rotation means

Claims (3)

[Claims] An inspection table on which resin molded products having an upper end opening and having a bottom formed by a resin molding machine are automatically or manually placed, and light is directed toward the resin molded product placed on the inspection table. A light irradiating means for irradiating, a mirror surface reflecting inner and outer surfaces excluding a bottom surface of the resin molded product irradiated by the light irradiating means, and a position which can hold the mirror surface and project the inner and outer surfaces of the resin molded product. Mirror positioning means for positioning; photographing means for photographing an image of the inner and outer surfaces reflected on a mirror surface and an image of the bottom surface illuminated by the light irradiating means; and forming the resin based on a signal output from the photographing means. An image display means for displaying the state of the inner and outer surfaces and the bottom surface of the article. 2. The resin molded product inspection apparatus according to claim 1, wherein the inspection table is configured to be unable to rotate around a vertical axis. 3. The resin molded product inspection apparatus according to claim 1, wherein the inspection table is configured to be rotatable about a vertical axis by a rotation unit.