JPH1019798A - Inspection method of mixed foreign matter in bag and inspection equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely inspect with high precision whether mixed foreign matter exists, by clamping a soft synthetic resin bag filled with liquid between two transparent plates, rotating the bag, turning solid foreign matter into the suspended state, and photographing it. SOLUTION: A bag clamper 2 comprises two transparent plates 21. A pair of retaining plates 22 are fixed on one side surface of one (lower side) transparent plate 21. By adjusting the length in the vertical direction in accordance with the thickness of a bag 1, it can be suitably clamped between the transparent plates 21. When the bag 1 filled with liquid is transferred, the upper transparent plate 21 is opened, and the bag 1 is mounted on the lower transparent plate 21. The upper transparent plate 21 is closed, and the bag 1 is clamped. The bag clamper 2 is rotated 90 deg. on the vertical plane, and set in the vertical direction. Foreign matter which has strayed into the bag 1 is collected in the lower part. By rotating the bag clamper 180 deg., the foreign matter which has accumulated in the bottom part is made to fall from above. The falling foreign matter is illuminated with a transmitting light L, and photographed with a camera C. Thereby existence of foreign matter is inspected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for inspecting foreign matter contained in a bag, and more particularly to a bag made of a transparent soft synthetic resin filled with a liquid such as a chemical. TECHNICAL FIELD The present invention relates to a method and an apparatus for inspecting foreign matter mixed in a bag, which accurately and surely inspects for the presence or absence of a foreign substance.

[0002]

2. Description of the Related Art Conventionally, when inspecting the presence or absence of a solid foreign substance mixed in a container (bag) made of a transparent soft synthetic resin filled with a liquid, the container is conventionally placed on a rotary table T as shown in FIG. It was placed vertically on a rotating holder H provided, rotated and stopped, and the inside of the container was photographed with a camera C to check for the presence of solid foreign matter. FIG. 6 shows an apparatus for inspecting a solid foreign substance that has entered into a liquid filled in a container. The apparatus shown in FIG. 6 is a method in which the container is rotated once for inspection, stopped, and then inspected with a camera. The rotation of the light source is performed by rotating the horizontal surface while keeping the container upright.
Object to be inspected-Inspection of foreign matter by the optical system of the camera.

[0003]

In the above-mentioned conventional method and apparatus for inspecting solid foreign matter mixed in a bag, the lower portion is thickened and the upper portion is thinned by the weight of the contents because the bag is forcibly placed vertically. At the same time, the overall cross-sectional shape becomes elliptical. For this reason, the light transmittance varies depending on the diameter of the upper and lower portions, and a measurement error occurs. In addition, since the cross-sectional shape is elliptical, foreign matter in the bag hardly rises or hardly rises even when the bag is rotated. For this reason, it is necessary to perform inspection at the elliptical long diameter portion of the bag, and it is necessary to control the position of the rotation stop. Partial wrinkles occur, making measurement difficult. In addition, there is a problem that the bag jumps out of the rotating device during rotation because the bag is unstable. In order to solve the above problems, a method has been developed in which the bag is inserted into a transparent cylinder P for inspection as shown in FIG. 5, but even in this case, as shown in FIG. When the bottom of the seal rises in a triangular shape inside the bag, and solid foreign matter falls into the lower triangular portion, it rises from the bottom and cannot float in the liquid even if the bag is rotated. there were. The present invention solves the problems of the above-described conventional method for inspecting contaminant contaminants in a bag. Even if air in the bag is bubbled by rotation of the bag or the like, the air bubbles and solid foreign matter mixed in the liquid can be eliminated. It is an object of the present invention to provide a method and an apparatus for inspecting contaminated foreign matter in a bag, which can identify both of them from the difference in the refractive index of the transmitted light and can surely inspect the presence or absence of contaminated foreign matter.

[0004]

In order to achieve the above object, a method for detecting contaminants in a bag according to the present invention comprises the steps of: sandwiching a bag made of a soft synthetic resin filled with a liquid between two transparent plates; Next, the solid is mixed with the liquid to make it float, and then the bag is photographed with a camera to check for the presence of the foreign matter.

In the method of the present invention for inspecting foreign matter mixed in a bag having the above-described structure, the bag that is hermetically filled with liquid is sandwiched and rotated by the bag support, so that the bag is safely supported. The liquid inside is agitated, and if solid foreign matter is mixed, the foreign matter floats in the bag, so that the presence or absence of the foreign matter can be easily and reliably inspected by photographing with a camera.

The method for detecting foreign matter in a bag according to the present invention is characterized in that a bag made of a soft synthetic resin sandwiched between two transparent plates is rotated vertically so that foreign matter mixed in a liquid is settled. Then, by rotating the bag by 180 °, the foreign matter that is being settled can be photographed by a camera.

In the method for inspecting foreign matter contained in a bag according to the present invention having the above-described structure, the bag is first rotated by 90 degrees to be vertical, so that the solid foreign matter mixed in the bag is located anywhere in the bag. When the collected foreign matter falls from the upper side of the bag to the lower side by its own weight by 180 degrees, it is surely collected. The small foreign matter caught by the camera and the foreign matter entering the corner of the bag can be reliably detected, and the detection accuracy can be improved.

The apparatus for inspecting foreign matter contained in a bag according to the present invention comprises a bag holding device comprising two transparent plates for holding a bag made of a soft synthetic resin filled with liquid, and rotating the bag holding device. It is characterized by comprising rotating means and inspection means for photographing the bag with a camera and inspecting for the presence or absence of solid foreign matter.

In the apparatus for inspecting foreign matter contained in a bag according to the present invention having the above-described structure, the bag to be inspected is clamped between the transparent plates of the bag clamp, and the bag clamp is rotated. , The bag is securely supported and the bag does not drop during rotation and there is no other movement etc., and the reliability of the inspection is improved, and the bag is photographed with a camera through the transparent plate to check for the presence of foreign matter. The apparatus is simple and high-precision inspection can be performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method and an apparatus for inspecting foreign matter in a bag according to the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes a bag having a predetermined internal volume made of a transparent soft synthetic resin sheet, and the bag 1 is hermetically filled with a liquid, for example, a drip solution or another liquid substance. When filling the transparent soft synthetic resin bag with a liquid, sometimes a solid foreign matter is mixed in the liquid. It is necessary to securely and securely inspect with a camera whether or not solid foreign substances (impurities) are mixed in the liquid.

According to the present invention, the bag 1 made of a soft synthetic resin which is easily deformed is sandwiched between the bag holders 2 and the inspection is performed by a camera. This bag holding device 2 is configured as shown in FIG. That is, the two transparent plates 21 and 21 have a size corresponding to the size of the bag 1, the upper and lower surfaces are both formed of transparent plates having optically parallel planes, and the material is glass or more. Hard ones are preferred.

On one side of one (lower) transparent plate 21, support plates 22, 22 are attached so as to be adjustable in the length direction thereof. The adjustment of the support plate is made up and down by the thickness of the bag. It is adjustable so that the bag can be properly sandwiched between the two transparent plates 21 and 21. For example, when a long hole is formed in the support plate 22 and the bolt is inserted and fixed in the long hole, the protrusion of the support plate 22 in the upward direction is adjusted. Hinges 23, 23 are provided at the tips of the support plates 22, 22, which are fixed to the lower transparent plate 21, respectively.
The other (upper) transparent plate 21 is rotatably supported via the hinge 23 as shown in FIG.
Thus, the bag is sandwiched between the upper and lower two transparent plates.

The upper and lower transparent plates of the two transparent plates 21 are made of the same material, and the two transparent plates are installed optically in parallel. As shown in FIG. 2B, a lock plate 24 that can lock when the upper transparent plate is tilted so that the two plates are parallel to each other is attached to the lower transparent plate. The lock plate 24 has one end side of the support shaft 2.
5, the lower transparent plate 21 is rotatably supported, and a locking projection 26 is provided inside the other end, so that the two transparent plates are parallel as shown in FIG. 2 (B). At this time, the upper transparent plate is locked with the upper transparent plate so as not to open unnecessarily. Further, a rotation shaft 3 for rotating the entire bag holding device is attached to the lock plate 24 or the lower transparent plate.

Therefore, the bag holding device shown in FIG. 2 is an example, and any structure may be used as long as the upper and lower transparent plates can sandwich and fix the bag in an optically parallel plane. For example, a structure in which the upper plate moves up and down instead of the rotating operation to sandwich the bag in an apparatus satisfying the above conditions may be used.

Next, the operation of the present invention will be described with reference to FIG. The bag 1 filled with the liquid is transferred from the previous process by a conveyor or the like, and the upper transparent plate is placed on the lower transparent plate of the bag holding device opened upward, and the upper transparent plate 1 is turned. Move it and sandwich the bag between the upper and lower transparent plates. The upper and lower plates are both transparent and parallel. When the upper transparent plate is rocked and locked, the bag does not fall. Next, the bag holding device 2 is moved 90
Rotate to make it vertical. As a result, foreign matter that has entered into the bag is first collected at the lower portion of the bag, which is vertical at any position of the bag. In addition, 18
When the bag is rotated 0 degrees and the top and bottom of the bag in the above process are reversed,
The foreign matter that has accumulated at the bottom of the bag until now is located above the bag and falls from above the bag. The falling foreign matter is photographed by the camera C using the transmitted light type illumination L, and the presence or absence of the foreign matter is determined.

FIG. 3 is a conceptual diagram of a continuous inspection apparatus using the bag holding device shown in FIG. The bags made of the transparent soft synthetic resin made in the previous process and filled with the liquid inside are sealed and transported in a row on a conveyor 10 or the like, and the bag holding devices are sequentially moved along the circulation circuit. Conveyed. The bag is inserted and supplied from the return circuit by an insertion device provided in a part of the bag circulation circuit onto the empty transparent plate on the lower side of the bag clamp with the upper transparent plate opened. In this case, the upper transparent plate is in an open state, and in the next process, the upper transparent plate rotates, and the two transparent plates are parallel to each other so that the bag is sandwiched and the lock plate is rotated so as not to drop. To lock. Next, the bag holding plate is rotated 90 degrees about a rotation axis on a vertical plane. With this rotation,
Foreign matters that have been deposited and distributed in various ways on the flat bottom of the bag are collected and collected on the vertical bottom of the bag. When the bag is further rotated by 180 degrees, the foreign substances start to settle all at once. A photograph is taken by a camera so as to catch the settling foreign matter, and the presence or absence of the foreign matter is determined. After the inspection is completed, the bag is rotated 180 degrees to the initial hanging state, and in the next step, the bag is further rotated 90 degrees to be in a flat state, then unlocked and the upper transparent plate is opened. Next, based on the information determined in the previous process, the bags are discharged while distinguishing between good and defective products. The process after the bag is discharged is a circuit for returning the empty bag-clamping device, thus constituting a circulation circuit of the bag-clamping device, and the empty bag-clamping device is sent to the insertion process.

In the above-described apparatus, various operations in each process, that is, insertion, rotation of the upper transparent plate, locking, photographing, and defect determination are performed in a continuous manner. A batch-type method of operating may be used. In addition, here, after the rotation by 90 degrees, the rotation is further performed by 180 degrees, but the inspection can be performed only by one rotation of 90 degrees.

[0018]

According to the method for detecting foreign matter contained in a bag according to the present invention, since the bag is rotated while being sandwiched, the soft bag is held without losing its shape, and the bag is mixed by rotating the bag. Since the foreign matter thus generated can be suspended in the liquid, the foreign matter can be reliably inspected, and high inspection accuracy can be obtained. In addition, the foreign matter which has been sunk everywhere in the bag so as to adhere to the inner surface of the bag is made vertical by rotating the bag by 90 degrees, so that it is once gathered at the vertical bottom portion of the bag, and further rotated by 180 degrees. By reversing the upside down, foreign matter can be dropped at the same time, and this state is photographed and inspected by a camera, so that the inspection efficiency can be improved. Also,
ADVANTAGE OF THE INVENTION According to the foreign-matter inspection apparatus in a bag of this invention, it can test | inspect continuously and reliably, and there exists an advantage which can perform an efficient inspection.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of a method for detecting foreign matter mixed in a bag according to the present invention.

FIGS. 2A and 2B are explanatory views showing one embodiment of a bag holding device used in the apparatus for inspecting foreign matter mixed in a bag according to the present invention, wherein FIG. 2A is a front view showing a state in which an upper plate is opened, and FIG. FIG.

FIG. 3 is an explanatory view showing a method for inspecting foreign matter in a bag according to the present invention.

FIG. 4 is an explanatory view showing a bag support used in a conventional method for detecting foreign matter in a bag.

FIG. 5 is an explanatory diagram showing a different embodiment of a bag support used for a conventional method for detecting foreign matter mixed in a bag.

FIG. 6 is an explanatory diagram of a method for inspecting foreign matter in a bag according to the present invention.

FIG. 7 is an external perspective view of the bag holding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag 2 Bag clamp 21 Transparent plate 22 Support plate 23 Hinge 24 Lock plate 25 Support shaft 26 Locking projection 3 Rotation shaft

Claims (3)

[Claims] 1. A bag made of a soft synthetic resin filled with a liquid is sandwiched between two transparent plates and then rotated to float solid foreign matters mixed in the liquid.
A method for inspecting foreign matter mixed in a bag, characterized in that the presence of foreign matter is inspected by photographing the bag with a camera. 2. A bag made of a soft synthetic resin sandwiched between two transparent plates is rotated to be vertical, and foreign matters mixed in the liquid are settled, and then the bag is rotated by 180 ° to settle. 2. The method according to claim 1, further comprising photographing a foreign substance in the course of the cleaning with a camera. 3. A bag holding device made of two transparent plates for holding a bag made of a soft synthetic resin filled with liquid, rotating means for rotating the bag holding device, and a solid foreign object obtained by photographing the bag. And an inspection means for inspecting the presence or absence of a foreign matter.