JP4149187B2 - Pinhole inspection machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pinhole inspection apparatus for inspecting sealing defects such as pinholes in various forms of packaging containers formed of an insulating material such as resin and filled with chemicals, foods, cosmetics, and the like.
[0002]
[Prior art]
As an example, as a voltage application type seal inspection machine for extremely thin and small sachet packages such as sauces and soups enclosed with retail lunch box actual equipment, as far as the inventor knows, the information that is still on the market is Absent. Compared to general packaging products, it is a very small container, but most of its contents are liquid and soft, so it is more difficult to handle the subject than the test itself. It is thought that it was off.
[0003]
As a pinhole inspection machine for this problem, what can be considered outside the method of the present invention is that as many specimens as possible are sealed in a sealed inspection box, and the inside of the box is pressurized or evacuated to be covered. A method can be considered in which the volume is changed with time depending on the pressure condition of the specimen.
In this case, due to the processing ability required for each subject, there is a problem that it takes time and effort to identify defective products after a large amount of inspection is performed.
In any case, an efficient and economical pinhole inspection machine suitable for such a subject has been a challenge strongly demanded by the industry.
[0004]
[Means for solving problems]
The present invention is an automatic and high-performance voltage application type pinhole for a subject having a thin bag-like outer coating compared to a general packaging container and having a highly flexible liquid content. In order to provide an inspection machine that can achieve the inspection, the following configuration is adopted.
That is, in the present invention , plural sets of upper and lower two layers are arranged in parallel in the width direction perpendicular to the transport direction, and each subject is pressed and pressed by pressing from the upper and lower directions, and moves around and moves downstream. Are arranged in parallel or opposed to each other at different positions on the surface of the subject on the outer side in the gap or width direction formed between the first endless belt and The first electrode group composed of a plurality of electrodes including at least two electrodes having different polarities and the first endless narrow belt, respectively, are disposed along the downstream side from the gap between the first endless thin belt and are the same as the first endless belt A second endless belt having the same structure as the first endless belt, and a second electrode group having a configuration similar to that of the first electrode group. It is a thing.
Further, the most downstream pulley over which the first endless belt is bridged and the most upstream pulley over which the second endless belt is bridged may be constituted by the same pulley.
[0005]
【Example】
The mechanism and operation of the first embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 is an explanatory side view of the present invention, in which first-stage and second-stage transport means are connected in series in a planar configuration.
The subject 10 entering from the loading conveyor 30 travels in the direction of the arrow while being pressed between the first-stage driving pulleys 22A and 22B and the intermediate pulleys 23A and 23B by the endless narrow belt 21 that is stretched vertically. .
[0006]
Further, the belt advances between the second stage intermediate pulleys 23A and 23B and the driven pulleys 24A and 24B while being sandwiched between the upper and lower endless endless belt 21 and lightly pressed.
While the subject travels through both stages of the transport means, the positive electrode of the first electrode group 1A and 1B above and below the first stage of the first electrode group, and the voltage application missing part of the endless narrow belt part at the front stage A pinhole is inspected by applying a voltage to the upper and lower epidermis of the subject 10 with light contact with the two electrodes 2A and 2B positive electrodes in two stages.
[0007]
FIG. 2 is an explanatory plan view of the present invention. The difference in the expansion relationship between the first and second stages of the endless belt 21, that is, the voltage application to the subject 10 at the first stage is that of the narrow belt. While the portion is missing, it can be seen that the extension position of the second-stage narrow belt is changed, and the second-stage electrode complements the first-stage voltage application missing section.
FIG. 3 is a front explanatory view seen from the AA arrow in FIG. 1 of the present invention.
[0008]
As shown in FIG. 1, the tip of each electrode is surely applied with a voltage while being gently bent in the advancing direction because the amorphous metal fiber is lightly in contact with the skin portion of the subject 10.
FIG. 1 also shows an electrical circuit diagram. The positive electrode of the first and second electrodes, the negative electrode, the power source 41 and the detection control circuit 42 are connected by a connection circuit 43.
[0009]
Here, when a pinhole or a seal failure is detected in the skin portion or the seal portion of the subject 10, a flash current flows through the portion, and when the current value exceeds a specified current value, the detection control circuit 42. Sends an alarm and an out-of-system exclusion signal as a defective product. The subject 10 that has been inspected passes through the second-stage transport means and is transferred to the discharge conveyor 40 in the next step, where a series of inspections is completed.
[0010]
FIG. 4 is a reference explanatory diagram of the second embodiment of the present invention.
The inner endless belt 21 is inclined toward the center by a specified angle α while being orthogonal to the axis of each pulley. For this reason, the subject 10 is centered from both sides because of a vector change corresponding to the angle at which the outer belts are inwardly moved by an α angle with respect to the belt speed at which the subject 10 travels straight along the inner endless belt. A component force that moves closer will act.
[0011]
For this reason, the subject 10 travels while being held at the center line in the inspection machine without deviating from the transport direction or becoming unstable. The angle α is determined based on the strength of the subject 10. Therefore, it is necessary to select a minimum angle that will not be extremely deformed by the generated component force.
FIG. 5 is an example of a subject to be handled by the inspection machine of the present invention.
Here, in the sachet enclosed with the actual item of the retail lunch box, the thickness T is about 5 mm, and L and W have a minimum size of about 30 to 60 mm.
[0012]
1 and 2, the driving motor for driving pulleys 22A and 22B, the tension means for the belt between the pulleys, the adjustment of the distance between each pulley and the upper and lower belt layers, and the adjustment of the clamping pressure of the subject. Of course, these are necessary parts such as means, but all are technically common sense, and the convenience and illustration details are omitted.
[0013]
The number of stretches of the endless belt 21 shown in FIGS. 1 and 2 is four at the first stage and three at the second stage, but depending on the size of the subject 10, three, two, and conversely five. There are also cases where the number is changed to four.
[0014]
【The invention's effect】
As described above, the mechanism and configuration of the present invention are not particularly elaborate, and can be provided at a low cost for both procurement and production of machines because they are organized by a combination of ordinary machine elements.
[0015]
In addition, as described above, the dimensions and properties of the subject are different from general and normal packaging containers, and the handling of the subject in the inspection machine is ensured in spite of the difficulty in handling. By holding it, it is possible to provide a pinhole inspection machine capable of mass processing of several hundred pieces / classification as well as an efficient supply system of the previous process.
[Brief description of the drawings]
FIG. 1 is an explanatory side view of a first embodiment of the present invention. An electrical control system diagram is also shown.
FIG. 2 is a plan view of the first embodiment of the present invention.
3 is a front view of the first embodiment of the present invention, and is a view taken along the line -A- in FIG.
FIG. 4 is an explanatory plan view of a second embodiment of the present invention.
FIG. 5 is an overhead view of an example of a subject to be inspected by a pinhole inspection machine according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st electrode group 2 2nd electrode group 10 Subject 21 Endless belt belt 22 Driving pulley 23 Intermediate pulley 24 Driven pulley 30 Loading conveyor 40 Discharging conveyor 41 Power supply 42 Detection control circuit 43 Connection circuit

Claims (2)

At least two electrodes having different polarities are brought into contact with different portions of the surface of the subject in which the conductive fluid is sealed with a flexible and thin insulating bag-like outer covering, and a flash current flowing between the electrodes is detected. In the pinhole inspection machine configured to detect pinholes or poor seals in the exterior coating , a plurality of sets of upper and lower two layers are arranged side by side in the width direction perpendicular to the transport direction, The first endless narrow belt that is pressed and pressed from above and below, moves around and is conveyed downstream, and a gap formed between the first endless narrow belt or the outside in the width direction. A first electrode group composed of a plurality of electrodes including at least two electrodes having different polarities arranged in parallel or facing each other so as to contact different portions of the surface of the subject, and the first endless strip A second endless belt having a configuration similar to that of the first endless belt, and a gap between the second endless belt and the outer side in the width direction. And a second electrode group having the same configuration as that of the first electrode group.   2. The pin according to claim 1, wherein the most downstream pulley on which the first endless belt is bridged and the most upstream pulley on which the second endless belt is bridged are constituted by the same pulley. Hall inspection machine.

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