JPS59128427A - Method for detecting leakage of liquid - Google Patents

Abstract

PURPOSE:To ensure quick detection of leakage, by deforming the side wall of a flexible container, which is filled with a coloring liquid and whose opening part is tightly sealed by a plug, by a constant pressure compressing mechanism, absorbing the coloring liquid, which leaks when the sealing is poor, by filtering paper, and detecting the defect by a photoelectric switch. CONSTITUTION:A flexible container 3 is filled with a coloring liquid L such as ink and sequentially conveyed to a detecting position by a holding member 2, which is arranged on the same circumference of a turntable 1. An opening part of the container 3, which is tightly sealed by a plug 31, is coupled into a guide hole 41 of a guide plate 4 of a detecting part. Filtering paper 5 is sent to the guiding hole 41 by a winding mechanism and made to contact with the tightly sealed part of the container 3. A photoelectric switch 6 is provided at a certain angle above the guiding hole 41. A light beam is rotated around the periphery of the opening part of the container by the action of a motor 7 and projected on the periphery. When the filtering paper 5 is colored by the leaked liquid, reflectivity is decreased, and measurement is performed based on this fact. Then, a constant pressure compressing mechanism 8 is moved to the side of the holding tool 2 and the container 3 is pushed and deformed. When the sealing by the plug 31 is incomplete, the filtering paper is colored by the leaked liquid, and this event can be positively detected.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting liquid leakage in a tight container filled with a colored liquid.

It is essential to make sure that sealed containers filled with colored liquids, such as ink cartridges for sickle marking tools, are completely sealed and there are no leaks, but especially for those that are mass-produced. , 7JA The key point is that it can be detected quickly.

Therefore, an object of the present invention is to provide a method that can reliably, easily and quickly detect liquid leakage from a flexible sealed container filled with a colored liquid, and its structure is as follows. The colored liquid is filled and splashed, and the side of the recirculating container whose opening is sealed with a cap is pressed and deformed by a constant pressure pressing mechanism, and the colored liquid that leaks out in the case of poor sealing is forced into the sealed part. It is characterized in that it is absorbed by the filter paper that is in contact with it to enlarge the colored area, and the presence or absence of this colored area is detected using a photoelectric stopper.

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a front view of the essential parts of the horizontally narrow device used in the present invention.
A plurality of containers 3 are arranged on the same inner circumference, and the containers 3 fed by a container supply mechanism (not shown) are held in the container holding member 2 9 with the opening facing upward. The container 3 is a cylindrical body made of flexible synthetic resin, and a through hole 21 is bored in the side wall of the container holding member 2. Turntable 1
First, colored liquid is injected into the pot at the injection station, and then a cap 31 is welded to the opening of the container 3 at the sealing station. Then, it reaches the detection station, where the guide plate 4 is arranged so as to be able to move outward, and the upper part of the container 3 is inserted into the guide hole 411C to be accurately positioned. Further, an erodible paper 5 is placed on the guide plate 4 so as to be movable by a winding mechanism, and when the container 3 is inserted into the guide hole 41, it comes into contact with the sealing portion at the top. A photoelectric switch 6 is installed above the guide hole 41 at a certain angle with respect to the perpendicular, and a motor 7 causes the projected light to sequentially irradiate substantially the opening edge of the container 3 while rotating. This Ku'ya switch 6 is a reflective type,
It detects when a reflective surface becomes colored and its reflectance decreases,
Exit the signal.

Further, a constant pressure pressing mechanism 8 is disposed on the side of the container holding member 2, and when the operating lever 81 is rotated, the constant pressure pressing mechanism 8 is disposed on the side of the container holding member 2.
can move laterally, fit into the through hole 21, and press the side wall of the container 3.

At the detection station, first, the guide plate 4 descends and the gIaS comes into contact with the sealed portion of the container 3, and the constant pressure suppression mechanism 8 advances to press and deform the container 3f. When the container 3 is compressed and deformed, the pressure inside the container 3 is high and the colored liquid moves, but if the lid plug 31 is not tightly attached, the colored liquid leaks out due to the partial force. be absorbed into. If the colored liquid in the container 3 is almost full, like an ink cartridge, the pressing force of the constant pressure suppression mechanism 8 is small enough to achieve this purpose. Immediately after the colored liquid is absorbed into the filter paper 5, the colored part is enlarged, and the colored part is clearly detected by the photoelectric switch 6. Then, on top of this value, stones are discharged at the next defective product discharge station. If the base stopper 31 is in perfect contact and there is no leakage, the three containers will not be discharged at the defective product discharging station and will be taken out at the next good product takeout station due to the no-arrival signal from the photoelectric switch 6.

In the detection method described above, 1. the flexible container is pressed with a constant pressure by the constant pressure suppression mechanism (8): the arm is deformed;
In case of poor sealing, the colored liquid can be reliably leaked. And knead? Since it is absorbed by the filter paper, even a small amount of leakage will immediately spread the L% colored area on the surface of the filter paper. Therefore, this can be reliably detected by a photoelectric switch, and defective products can be easily discharged by a signal from the photoelectric switch, and each process can be integrated into a container.

As described above, according to the present invention, liquid leakage from a sealed container filled with colored liquid can be reliably detected at ρ・t:jfS speed, so liquid leakage can be detected from items that are produced in large quantities such as ink cartridges. suitable for

[Brief explanation of the drawing]

FIG. 1 is a front view of the main parts of the device used in the embodiment of the present invention;
FIGS. 2(A) and 2(B) are process explanatory diagrams of this embodiment. 1... Turntable 2... Container holding member 3.
... Container 31 ... Lid stopper 5 ... Filter paper 6 ... Photoelectric switch 8 ... Constant pressure pressing mechanism L ... Colored liquid Applicant Sailor Fountain Pen Co., Ltd. Agent Patent attorney 1) Pagenosuke Hara

Claims (1)

[Claims] A filter paper in which the side wall of a flexible container filled with a colored liquid and whose opening is sealed with a cap is suppressed and deformed by a constant pressure suppression mechanism, and the colored liquid that leaks out in the event of a sealing failure is brought into contact with the sealed part. A method for detecting liquid leakage, characterized in that the liquid is absorbed by the liquid to enlarge a colored part, and the presence or absence of this colored part is detected by a photoelectric switch.