JP3085515U - Inspection device for metal bottle cap tightening by X-ray - Google Patents

Abstract

(57) [Summary] [PROBLEMS] When tightening a metal bottle cap, an inspection is needed to verify the pressure and the tightening result. A tightening result can be proved by measuring a dimension of a portion where a cap and a bottle need to be in contact with each other using X-rays. Since the tightening pressure is on the tightening machine side, the relational expression can be derived.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention belongs to the field of nondestructive inspection.

[0002]

[Prior art]

 Conventionally, there has been no measuring device for a combination of a metal cap and a metal bottle. At present, a graph of the pressure applied to the cap top and a graph of the threading pressure are created, and data is created using a vacuum leak inspection machine to leak from the pressure of XXkg, respectively, and the applied pressure xxkg and threading pressure ○ Kg was determined, and products manufactured were checked for leakage by sampling inspection.

[0003]

[Problems to be solved by the invention]

 Metals can be damaged by applying a pressure higher than the allowable value, but if they adhere, no more pressure is required. Therefore, we want to measure whether or not they are in close contact. 1. The measurement points are the dimensions from the corner on the side of the bottle to the side on the cap. Here, the mold material is stretched on the cap side, so we want to measure including this thickness. 2. Next, I want to measure the dimensions of the side surface of the bottle mouth and the inner surface of the horizontal cap. 3. Since the product has a little bite into the screw after the product is formed, the screw loosens and the cap floats due to the internal pressure.

[0004]

[Means for Solving the Problems]

 The cap portion is seen through with X-rays, and the image of FIG. 1 is obtained. From the left side of the image, the dimensions of the intersection of the bottle outer top line A and the bottle outer side line A 'and the intersection of the cap inner top line B and the cap inner side line B' are measured. If this is within the thickness of the molding material, it is a good product. Next, similarly from the right side of the image, the dimension between the intersection of the bottle outer top surface line C and the cap inner side line D from the intersection of the bottle outer top surface line C and the bottle outer side line C 'is measured. This is also a good product if it is within the dimensions of the molding material, and a dimension of zero is a defective product due to overtightening. Note that the thickness of the mold material differs depending on the manufacturer and also on the type, so that an allowable value will be set later. In FIG. 2, if the dimension on the thread line E between the bottle-side thread line E ′ and the cap-side thread line E ″ is within the allowable value, it is a non-defective product except for a good product. On the thread valley line F, if the dimension between the bottle-side thread valley line F 'and the cap-side thread valley line F "is also within the allowable value, a non-defective product is acceptable. If the value is zero, it cannot be opened by hand at the time of opening, so it will be defective. In addition, since the material of the aluminum differs depending on the type of the content liquid, etc., an allowable value should be set for each application.

[0005]

[Embodiment of the invention]

 The embodiment of the invention will be described with reference to FIG. 3. A cap is conveyed on a conveyor (12) with the cap wound around a bottle. The cap is irradiated with X-rays from an X-ray generator operated by the high-voltage generator (11). An image is formed by the scintillator and camera device in the detector, and the image is entered into the image processing dimension measurement unit. The dimensions of each unit are measured according to the instructions from the measurement location and the tolerance setting unit. The result is sent to the pass / fail judgment unit. The pass / fail judgment unit judges pass / fail by also receiving the permissible value instruction from the measurement location and the permissible value setting unit, and the defective product is discharged by driving the defective product discharger (10). The initial confirmation of the measurement location and the inspection image shall be performed on the monitor for setting the measurement location.

[0006]

[Effect of the invention]

 Recently, bottles and caps made of co-metal have been on the market due to the novelty and advantages of recapping, and many varieties with different internal pressures, such as beer, carbonated beverages and tea, have begun to appear in the internal solution. Many accidents, called slow leaks, gradually release internal pressure, and if you forcibly tighten them, accidents that cannot be opened by hand will not stop. The only means for inspecting this point was a sampling destructive inspection. However, by implementing the present invention, it is possible to set a numerical value for a cap tightening device called a capper, thereby enabling stable production. Both bottles and caps are manufactured by processing metal in particular, so there is large variation between products, and the rejection rate is currently high. With the advent of this project, material savings, lower production costs, product stabilization and effects are significant.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of measurement points of a bottle and a cap.

FIG. 2 is an explanatory diagram of measurement points of a screw portion.

FIG. 3 is an explanatory diagram of the embodiment.

[Explanation of symbols] Cap Bottle Molding material X-ray generator Detector Image processing dimension measurement unit Measurement location and allowable value setting unit Pass / fail judgment unit Measurement location setting monitor ▲ 10 ▼ Defective product discharger ▲ 11 ▼ High pressure generator ▲ 12 ▼ Conveyor ▲ 13 ▼ X-ray leakage prevention housing A Bottle outside top line A 'Bottle outside side line B Cap inside top line B' Cap inside side line C Bottle outside top line C 'Bottle outside side line D Cap inside Side line E Thread line E 'Bottle-side screw line E "Cap-side screw line F Thread root line F' Bottle-side screw root line F" Cap-side screw root line

Claims (1)

[Utility model registration claims] 1. As means for checking whether or not a metal cap is tightly wound in a metal container and a bottle while maintaining a sealing property, A means for irradiating X-rays to image a cross section of a cap portion of a metal bottle conveyed on a conveyor. 2. Means for measuring the dimensions from the corners of the top and side surfaces of the cap to the corners of the top and side surfaces of the bottle from the captured image to determine the degree of adhesion of the cap. 3. Means for measuring the horizontal dimension of the upper side of the bottle and the circumference of the cap from the same image to determine whether the tightening pressure is appropriate. 4. Means for measuring the depth of the screwing portion from the same image and determining whether the screwing pressure is excessive or insufficient. 5. Means for removing detected defective products from the line. An apparatus for inspecting the tightening of a cap on a metal bottle by X-rays having the above configuration.