JP2003254941A - Pinhole inspection machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inspection machine for seal defect such as pinholes on a small bag container made of an insulating material for sealing soy sauce, sauce, mayonnaise subdivided for one meal or the like accompanying a dish in a retained box lunch or the like. <P>SOLUTION: In this pinhole inspection machine, during inspection executed by a conveyance means having a pulley constitution formed by developing flatly a plurality of endless narrow belts comprising upper and lower layers for conveying and simultaneously inspecting a specimen, the specimen is held in the slightly sandwiched and pressurized state by upper and lower endless round belt and conveyed in a stable attitude for preventing useless displacement. In the inspection machine, a large quantity of analytes can be inspected efficiently and surely by using an inspection mechanism having a system wherein two pairs of electrode groups formed by bundling standing plate-shaped amorphous metal fibers disposed orthogonally with the conveyance flow direction among three pulleys, namely, a driving pulley, an intermediate pulley and a driven pulley are brought into slight contact with a seal part of the specimen and the whole outside surface during the conveyance time to thereby apply a high voltage thereto. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pinhole inspection device for inspecting sealing defects such as pinholes in various types of packaging containers filled with medicines, foods, cosmetics, etc., formed of an insulating material such as resin. It is about.

[0002]

2. Description of the Related Art As an example, a voltage applied seal inspection machine for sachets, soups, etc., which are very thin and packaged in a very small size, such as retail box lunches, is still on the market to the inventor's knowledge. No information is available. Compared with general packaging, it is a container with a very small size, but most of the contents are liquid and it is difficult to handle the subject than the inspection itself due to the soft body property. It is thought that it was off.

As a pinhole inspection machine for this problem, which can be considered outside the system of the present invention, a large number of test objects are enclosed in a sealed inspection box, and the inside of the box is pressurized or evacuated. Then, a method of inspecting is possible by the change of the capacity with time according to the pressure condition of the subject. In this case, there is a problem in that it takes time to identify defective products after a large amount of them are collectively inspected due to the processing capacity required for the subject. In any case, an efficient and economical pinhole inspection machine adapted to such an object to be inspected has been a subject strongly demanded by the industry.

[0004]

The present invention is a packaging container which is extremely small in both thickness and outer diameter dimension as compared with a general packaging container, and moreover has a high performance automatically and with a soft body container in which the content is liquid. In order to provide an inspection machine capable of achieving the voltage application type pinhole inspection, the following configuration is adopted. 1) Having a set of a plurality of endless strip belts of an upper and lower two-layered belt having a flat conveyance surface at the same height as the belt for the specimen conveyed in a flat state on the charging conveyor in the previous step It is received by the conveyor of the first-stage transfer means, and the sample is transferred while being lightly pressed by the two upper and lower transfer surfaces. 2) The object being conveyed is arranged in a space between each of a plurality of endless strip belts, and the total width of the belt and the outer end portions on both sides are outside the belt expansion, and the total width of the object is slightly different. The positive electrode of the first electrode, which is extended to a certain size and is fixed in the form of a bundle of vertical plate-shaped amorphous metal fibers that are opposed to each other in the upper and lower two stages of a straight line orthogonal to the conveying direction, and 3) the positive electrode of the first electrode. A first electrode group consisting of a plurality of electrodes including a pair of upstream and downstream first electrode negative electrodes that are adjacent to each other in parallel in the transport direction at a fixed interval are provided between the drive and intermediate pulleys that constitute the endless strip belt. 4) With these electrode groups, the upper and lower sealing surfaces of the subject being passed and the entire outer epidermis were lightly contacted and a voltage was applied. 5) The endless end of the first-stage transfer means is provided between the intermediate pulley configured to continuously transfer the object under pressure and the driven pulley arranged downstream, following the first-step transfer means. A second-stage conveying means having a plurality of endless thin belts stretched at a half-pitch of the narrow belt stretching pitch, and 6) applying a voltage to the subject by the first-stage conveying means, As described above, since the voltage is not applied due to the lack of the electrode of the belt expansion part, the narrow band belt is expanded by 1/2 pitch to expand the voltage, and the other electrodes are arranged in the first stage. By so doing, the voltage is applied to the missing portion of the endless strip belt part of the first-stage transport means in the subject 7) Each electrode group has a power source and a defective portion when a seal defect is detected. The flashover current generated in the It is connected to a fixed detection control circuit and sends various signals as needed. As described above, as described above, the thin and ultra-small size, and liquid-filled, soft-body sample is securely held and conveyed by the upper and lower endless strip belts while being securely held and conveyed. An electrode with a bundled vertical plate structure of fibers realizes inspection by effective and reliable voltage application. In addition, the following measures were also provided in order to ensure the test transportation of the subject. 8) Inclining the outermost right and left outermost belts of both the first and second upper and lower endless belts for conveyance by a specified minute angle inward with respect to the linear extension of the inner regular extension. As a result, the subject is pushed by a minute component force generated from the left and right in the center of the inside when viewed from the traveling direction, and the posture control force that does not derail the left and right during the progress is exerted to hold the subject. Assure. (Claim 2) As described above, an efficient and accurate pinhole inspection machine is provided.

DETAILED DESCRIPTION OF THE INVENTION

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The mechanism and operation of the first embodiment of the present invention will be described below with reference to FIGS. Figure 1
In the side view of the present invention, the first-stage and second-stage transporting means are connected in series in a planar configuration. The subject 10 entering from the charging conveyor 30 is sandwiched between the first-stage drive pulleys 22A and 22B and the intermediate pulleys 23A and 23B by the vertically stretched endless strip belt 21 and is lightly pressed to proceed in the arrow direction. .

Further, the intermediate pulley 23 of the second stage continues.
A and 23B and driven pulleys 24A and 24B are sandwiched between the upper and lower ends of the endless strip belt 21 extending vertically, and are advanced while being lightly pressed. While advancing through both stages of the transport means, the subject uses the positive electrodes of the upper and lower first electrode groups 1A and 1B of the preceding stage, and the voltage application lacking portion of the endless strip belt of the preceding stage is the second stage. A voltage is applied to the entire upper and lower epidermis of the subject 10 by two electrodes 2A and 2B positive electrodes while lightly contacting them, and a pinhole is inspected.

FIG. 2 is a plan view of the present invention. In FIG. 2, the difference in expansion relation between the first and second stages of the endless strip belt 21, that is, the voltage application to the subject 10 in the first stage is small. It can be seen that, while the strip belt portion is missing, the spreading position of the narrow belt of the second stage is changed so that the voltage application missing portion of the first stage is complemented by the electrode of the second stage. FIG. 3 is a front explanatory view seen from the AA arrow of FIG. 1 of the present invention.

The tip of each electrode is, as shown in FIG.
Since the amorphous metal fibers are lightly in contact with the epidermis of the subject 10, it is assumed that the voltage is surely applied while gently bending in the traveling direction. FIG. 1 also shows an electrical circuit diagram, in which the positive electrodes of the first and second electrodes, the negative electrode, the power source 41 and the detection control circuit 42 are connected by the connection circuit 43.

When a pinhole or a seal defect is detected in the skin or seal of the subject 10,
When a flashover current flows to the location, and the current value exceeds a prescribed current value, the detection control circuit 42 issues an alarm and an out-of-system exclusion signal as a defective product. Test subject 10
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.

FIG. 4 is a reference explanatory view of the second embodiment of the present invention. The inner endless strip belt 21 is orthogonal to the axis of each pulley, but is inclined toward the center by a prescribed angle α. Therefore, the conveyance speed of the subject 10 is different from the straight belt speed of the inner endless belt.
Since both outer belts change in vector by an angle inwardly swung by an angle α, a component force that biases the subject 10 from both sides toward the center is applied.

For this reason, the object 10 does not deviate from the carrying direction or becomes unstable, and the object 10 advances while being held at the center line in the inspection machine. Further, the angle α indicates the strength of the object 10. As a rule, it is necessary to select the minimum angle that will not cause extreme deformation due to the generated component force. FIG. 5 shows an example of an object to be examined handled by the inspection machine of the present invention. Here, in the pouch enclosed with the retail lunch box, the thickness T
Is about 5 mm, and L and W are often around 30 to 60 mm and have very small dimensions.

1 and 2, the driving prime movers of the drive pulleys 22A and 22B, the tensioning means for the narrow belt between the pulleys, the adjustment of the spacing between the pulleys and the upper and lower two layers of the belt, and the inspection of the subject. Although it is a necessary part such as clamping force adjusting means, all are within the technically common sense,
For convenience, illustration details are omitted.

The endless strip belt 21 shown in FIGS. 1 and 2.
The number of expansions is 4 for the first stage and 3 for the second stage, but depending on the size of the subject 10, there are cases in which the number is changed to 3, 2 and conversely 5, 4 and so on.

[0014]

As described above, the mechanism and structure of the present invention are not particularly elaborate, but can be provided at a low cost for procuring and manufacturing a machine, since they are put together by a combination of very common machine elements.

Further, as described above, the dimensions and properties of the subject are different from those of general and normal packaging containers, and it is particularly difficult to handle them, but when the subject is inspected for transportation in the inspection machine. By holding the posture securely, it is possible to provide a pinhole inspection machine that has an efficient supply system in the previous process and is capable of high-volume processing of several hundred pieces / class.

[Brief description of drawings]

FIG. 1 is a side view illustrating 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, which is a view taken along the line -A- in FIG.

FIG. 4 is a plan view of a second embodiment of the present invention.

FIG. 5 is an overhead view of an example of a subject 10 to be inspected by the pinhole inspection machine of the present invention.

[Explanation of symbols]

1 First electrode group 2 Second electrode group 10 subject 21 Endless round belt 22 Drive pulley 23 Intermediate pulley 24 Driven pulley 30 loading conveyor 40 discharge conveyor 41 power supply 42 Detection control circuit 43 Connection circuit

Claims (2)

[Claims] 1. A packaging container made of an insulating resin or the like in which conductive contents such as food are hermetically sealed, such as soy sauce for seasoning, various sauces, etc., which are enclosed together with actual products in bento boxes, folding boxes, etc. for retail sale. In a pinhole inspection machine for inspecting a pinhole or a seal failure by applying a voltage to the sealing portion of a thin and very small pouch container (hereinafter referred to as "inspection object 10") that seals soup and the like and the entire epidermis, The upper and lower two-layer intermediate pulleys (23A and 23B) are the same as the upper and lower two-layer drive pulleys (22A and 22B) at intervals as close as possible to the thickness (T) of the subject for inspecting the sample (10) in the transport state. A first-stage conveying means for driving a prime mover, which is arranged on the upstream side and conveys the subject (10) while sandwiching the subject (10) from above and below with a plurality of endless strip belts (21) spread in a planar shape therebetween. , Intermediate pulley of upper and lower layers of the first stage transport means (23A
And a plurality of endless strip belts (2B)
1) A plurality of endless strip belts (2) between the other driven pulleys (24A and 24B) at a pitch of ½ of the stretching pitch of the group.
1) is expanded and connected in horizontal series to the first-stage transfer means, and the second-stage transfer means and the first-stage transfer means are configured to transfer the sample (10) in a pinched state continuously. A plurality of endless strip belts (21) stretched between the respective pulleys in the eye conveying means are provided so as to extend between the stretching pitches and the outermost end portion with a width that does not contact the right and left belts. It is assumed that the total width dimension is sufficiently larger than the width (W) of the subject (10) and is arranged in a row orthogonal to the transport direction on both sides, and the transport direction between the pulleys is Infinite number of amorphous metal fibers with a very small diameter, which are arranged in a plurality of rows at a plurality of equally spaced pitches and whose total length of the plurality of pitches is slightly smaller than the length (L) of the subject (10). Vertical plate, fixed in a bundle, and the tip is the entire upper and lower epidermis of the subject Except for the stretched portion of the strip belt, the plurality of electrodes are lightly contacted throughout and are configured to apply a voltage while the subject (10) passes through. The upper first electrode groups (1A) alternately arranged, the lower first electrode groups (1B) arranged so as to face the electrode groups vertically and above, and the above-mentioned second conveying means in the second stage. A plurality of endless strip belts (21) stretched between the pulleys are provided so as to have a width that does not contact the belts on the left and right sides and between the stretched pitches.
In addition, the total width dimension is extended to the outermost end, protrudes on both sides, and is arranged in one row orthogonal to the conveyance direction.
0) and has a width sufficiently larger than the width (W) of 0), and is arranged in a plurality of rows at a plurality of equal pitches across the conveyance direction between the pulleys, and the total length of the plurality of pitches is the object (10). ) Of a myriad of ultra-fine diameter metal fibers, which are configured to be slightly smaller than the length (L), are fixed in a vertical plate in a bundle shape, and the round belt portion is attached to the upper and lower epidermis portions of the subject at their tips. Except for lightly touching all over the surface, while the subject (10) passes, a voltage is applied to the missing part of the voltage application for the strip belt part of the first electrode group, A second electrode group (2A) in the upper part, in which a plurality of electrodes are alternately arranged with positive electrodes and negative electrodes in the flow direction, and a second electrode in the lower part, which is arranged so as to face the electrode groups vertically. Group (2B), the first electrode group (1A and 1B) and The two electrode groups (1A, 1B and 2) for the power source (41) and the seal part and the entire outer skin part of the subject, in which two electrode groups (2A and 2B) are connected and connected by a connection circuit (43).
By applying the voltage by either A, 2B),
When a pinhole or a seal defect is detected, a detection control circuit (42) is provided, which determines the amount of flashover current generated at the location and issues an alarm and a defective product exclusion signal. Pinhole inspection machine. 2. A plurality of endless strip belts (21) stretched between drive pulleys (22A and 22B) and intermediate pulleys (23A and 23B) of the first-stage conveying means.
And the intermediate pulley (23A
And 23B) and driven pulleys (24A and 24B
B) The upper and lower 8 sets of the endless strip belts stretched at the outermost ends on both sides in the plurality of endless strip belts (21) group spread between
The endless round belt that is stretched inside is stretched in parallel with the conveying direction, which is orthogonal to the rotation axis of each pulley, while the left and right outermost belts are centered toward each other by a small angle α. By stretching so as to incline in the direction, the subject (10) conveyed in a state of being clamped by the upper and lower endless strip belt groups is subjected to the linear force of the central belt and the skewed portion of the outermost inclined belts on both sides. The first stage of the subject (10) is positioned such that the subject (10) is not always deviated from the center by exerting a posture correction force by a component force toward the center generated by vector combination of forces. The pinhole inspection machine according to claim 1, further comprising a second-stage transporting unit.