JP2003222564A - Leak defect inspecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leak defect inspecting device with enhanced inspection accuracy on leak defects due to defective adhesion, etc., of a bottom part, on an inspection line for paper cups, etc. <P>SOLUTION: This inspection device is equipped with a rotary disk part having a multitude of recessed parts for mounting inspected objects on the periphery of a disk and having a multitude of inspection units for leak inspection, and a control panel part for controlling the whole of device. This device is characterized in that the inspection units each comprise an upper inspection fixture having a hollow part to be filled with pressurized air and a lower inspection fixture having a pressure sensor inside thereof for detecting leakage pressure leaking out of the bottom of the inspected object, and that the panel part is equipped with means for recording/processing measured data on leakage pressure leaking out of bottoms of a plurality of inspected objects for each of the inspection units and for inspecting the inspected objects based on reference values on leakage pressure for defective articles for each of the inspection units, the reference values being automatically calculated/set from the processed data. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an apparatus for inspecting leakage failure of a paper cup or the like. 2. Description of the Related Art Paper cups and plastic cups are made of solid foods such as ramen, powdered foods such as miso soup, soup, etc., because of their various characteristics such as ease of molding, light weight, and low cost. Widely used as disposable containers for beverages and the like. When eating these packaged solid foods or powdered foods, depending on the contents, water or boiling water is often poured and eaten. If the paper cup or plastic cup used at this time has a defective portion such as a pinhole, water or hot water leaks out, causing a serious accident such as soiling the surroundings and sometimes burning. recent years,
Due to the enforcement of the Product Liability Law and the like, the above-mentioned accidents cause enormous damage, and it is necessary to improve the quality control of paper cups and plastic cups to be shipped. For example, in the case of a paper cup, the object to be inspected is inspected with two inspection jigs in order to perform a high-speed production to increase production efficiency and to perform a high-speed defect inspection such as a bonding failure of a bottom portion that causes leakage. Inspection is carried out on an inspection line using an inspection device equipped with a large number of inspection units that are sandwiched between upper and lower surfaces and filled with pressurized air from above to inspect. In the inspection method, the paper cup to be inspected was supplied to the concave portion of the rotating disk portion using a supply conveyor, the upper and lower surfaces of the paper cup were sandwiched and sealed by the inspection unit, and pressurized air was introduced from the upper surface to maintain the pressure. It detects the degree of decrease of the pressurized air introduced after rotating as it is, inspects whether there is a hole in the side or molding failure at the bottom, etc., and discharges any defective products out of the inspection line. In the case of this method, it is difficult to detect a very small pressure decrease, and the inspection accuracy is lowered.In addition, since there are a large number of inspection units, the reference value of the pressure decrease as a defective is set to the same value in each inspection unit. Then, there is a drawback that a product with a large variation in quality is shipped. SUMMARY OF THE INVENTION An object of the present invention is to provide a leak failure inspection apparatus in which the accuracy of a leak failure inspection due to a defective bonding at the bottom or the like is improved on an inspection line such as a paper cup. It is in. According to the first aspect of the present invention, there are provided a plurality of recesses for mounting an object to be inspected on the outer periphery of a disk and a plurality of inspections for checking for leakage. In an inspection apparatus provided with a rotating disk part having a unit and a control panel part for controlling the entire apparatus, the inspection unit has an upper inspection jig having a hollow part for enclosing pressurized air and an inspection object inside. A lower inspection jig having a pressure sensor for detecting a leak pressure leaked from the bottom of the object, and wherein the control panel unit has a leak pressure leaked from the bottom of a plurality of inspected objects for each inspection unit. Record and process measurement data,
A leakage failure inspection apparatus characterized by comprising means for inspecting an inspection object based on a leakage pressure reference value of a defective product for each inspection unit automatically calculated and set from the processing data. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A leak failure inspection apparatus according to the present invention will be described below in detail along with embodiments. FIG. 1 shows a leakage defect inspection apparatus (10) of the present invention.
FIG. 2 is a diagram showing an outline of 0), in which a plurality of concave portions (2) for mounting an inspection object are provided on the outer periphery of a disk, and the inspection object is sandwiched in the depression (2) from above and below for inspection. Inspection unit consisting of an upper inspection jig and a lower inspection jig (11
22), a rotating disk (1) directly connected to a rotating shaft (not shown), and a control panel (30) for controlling the whole. FIG. 2 is a sectional view of the inspection unit (11 to 22), and shows an upper inspection jig (40) of the inspection unit.
Has a hollow portion (40a) for pressing the test object from above and sealing the test object with pressurized air after sealing. Further, the lower inspection jig (41) similarly presses the inspection object from the lower surface, and after sealing, detects the leakage pressure in which the pressurized air sealed in the inspection object leaks from the adhesion failure portion at the bottom or the like. Pressure sensor (42) is provided inside. By providing the pressure sensor (42), even a small amount of air leakage can be detected, and the inspection accuracy of defective products can be improved. The control section (30) records and processes leak pressure measurement data leaked from the bottom of at least 20 or more inspection objects for each inspection unit (11 to 22), and processes the average value and standard deviation. (Σ) is calculated, and there is programming software for automatically calculating and setting the leak pressure reference value of each defective unit for each inspection unit from the processing data. And
Each of the inspection units (11 to 22) inspects an object to be inspected thereafter. FIG. 3 is a diagram showing a state in which a defective inspection object (200) is inspected using the upper inspection jig (40) and the lower inspection jig (41). Jig (4
0) and the lower inspection jig (41), the object (200) is sandwiched from above and below, pressed down, sealed, and then sealed with pressurized air (43) from the upper surface.
The state where pressurized air is leaking from both sides of the bottom (200a) of 0) due to poor bonding or the like is described. Bottom (2
00a) is detected by the pressure sensor (42) from both sides, and when the leak pressure reaches the reference value of the defective product, it is fed back to the control unit (30), and the inspection object (200) is out of the inspection line. It is designed to be discharged to FIG. 4 shows a leakage defect inspection apparatus (10) of the present invention.
FIG. 2 is a view showing an example of an inspection line using the inspection apparatus (100), and a supply conveyor (101) for continuously supplying the inspection object (200) to the periphery of the inspection apparatus (100); Discharge conveyor (10
2) A discharge conveyor (103) for discharging non-defective products is installed. When each inspection unit comes to the position of the inspection unit (20) of the rotating disk unit (1) shown in FIG. 4, the leakage pressure leaked from the bottom of the inspection object (200) is measured, and the leakage pressure becomes When the leak pressure of the non-defective product is the standard value, it is discharged to the outside of the inspection line through the discharge conveyor (102). Various methods such as a method of blowing off with air or a method using a discharge jig are used. There is, but any. Hereinafter, a method of inspecting using the leak failure inspection apparatus of the present invention will be described based on one embodiment. First, the inspection object (200) is supplied to the concave portion (2) of the disk rotating portion (1) by using the supply conveyor (101), and the inspection object is inspected by the inspection jig of the inspection unit equipped immediately after the supply. The inspection object (200) is sandwiched from above and below and sealed. Immediately after sealing, the hollow part (4) of the upper inspection jig (40)
From 0a), pressurized air (43) with a constant pressure is sealed, and the disk rotating unit (1) is rotated while maintaining the pressure. The above operation is performed for each of the continuously supplied inspection objects (200), and the inspection object and the inspection unit are rotated by the disk rotating unit (1).
3/4 position of the outer circumference of the inspection (inspection unit (20) in FIG. 4)
When the pressure comes, the pressure sensor (42) provided on the lower inspection jig (41) of the inspection unit detects the leak pressure leaked from the bottom side of the inspection object. This inspection is performed using 30 inspection objects for each inspection unit (11 to 22), and finally, a total of 360 inspection objects are inspected by 12 inspection units. The leak pressure leaked from the bottom is measured, the measured value is recorded in the control unit (30), and the average value and standard deviation (σ) of each inspection unit are obtained from the 30 measurement data by the introduced programming software. The leak pressure reference value of the defective product for each inspection unit is automatically calculated and set from the calculation result. Based on the leak pressure reference value of the defective product set for each inspection unit, the inspection object thereafter was inspected. For example, based on the average value and the standard deviation (σ) of the leak pressure leaked from the bottom of a large number of inspected objects as programming software, the reference value of the leak pressure of the defective product is calculated as the average value + 3σ. By introducing software for automatically setting values, it is possible to reduce variations in inspection accuracy and inspection results for each inspection unit. According to the leak failure inspection apparatus of the present invention, the inspection unit fills the test object with pressurized air, detects a minute leak pressure leaking from the bottom with the pressure detection sensor, and controls the control unit. Records and processes the leak pressure leaked from the bottom of at least 20 inspection objects for each inspection unit, automatically sets the leak pressure reference value of defective products for each inspection unit from the processing result, and Inspection of the inspection object based on the pressure reference value improves the inspection accuracy, minimizes the variation in inspection between multiple inspection units, and implements stable process management. can do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall schematic diagram of a leak failure inspection device according to the present invention. FIG. 2 is a sectional view of an inspection unit of the leak failure inspection device according to the present invention. FIG. 3 is a diagram illustrating a state in which a defective inspection object is inspected by an inspection unit of the leakage defect inspection apparatus according to the present invention. FIG. 4 is an overall schematic diagram of an inspection line using the leak failure inspection device of the present invention. DESCRIPTION OF SYMBOLS 1 ... disk rotating part 2 ... concave part 3 ... pressurized air filled tube 4 ... wiring 11-22 ... inspection unit 30 ... control panel part 40 ... upper inspection jig 40a ... hollow part 41 ... lower inspection jig Tool 42 Pressure sensor 43 Pressurized air 100 Leakage defect inspection device 101 Inspection object supply conveyor 102 Defective product discharge conveyor 103 Defective product discharge conveyor 200 Specimen 200a Specimen bottom

Claims (1)

Claims: 1. A rotating disk having a plurality of concave portions for mounting an object to be inspected on the outer periphery of a disk and a plurality of inspection units for inspecting leakage, and controlling the entire apparatus. Inspection equipment provided with a control panel part for detecting the leakage pressure leaked from the bottom of the object to be inspected inside and the upper inspection jig having a hollow portion for sealing the pressurized air. The control panel section records and processes leak pressure measurement data leaked from the bottom of a plurality of inspection objects for each inspection unit, and processes the data. A leak failure inspection device comprising means for inspecting an inspection object based on a leak pressure reference value of a defective product for each inspection unit which is automatically calculated and set.