JP6011766B2 - Package inspection method and package inspection apparatus - Google Patents

Description

  In the present invention, in a state in which a plurality of packaging containers are arranged, a transparent or translucent belt-shaped resin film is wrapped and wrapped around them in a lump, and both ends of the resin film overlap each other to form a joint portion The present invention relates to a packaging body inspection method and a packaging body inspection apparatus for inspecting an overlapping state of the joint portion with respect to a package body.

  In recent years, packaging of packaging containers such as a plurality of PET bottles has been carried out by forming a package by wrapping with a resin film instead of a cardboard box in order to reduce CO2 emissions (for example, Patent Document 1).

JP 2003-146362 A

  However, the packaging body wraps and wraps a transparent or semi-transparent belt-shaped resin film around a plurality of arranged packaging containers, and forms a joint portion at an overlap portion between both ends of the resin film. In order to inspect the overlap state, an artificial visual observation method is only used, and an appropriate method and apparatus for inspecting accurately and quickly have not been found.

  Accordingly, it is an object of the present invention to provide an appropriate method and apparatus for solving the above-described problems and inspecting the overlapping state of the joint.

In one embodiment of the present invention, in a state where a plurality of packaging containers are arranged, a transparent or semi-transparent belt-shaped resin film is wrapped and wrapped together, and both end portions of the resin film are overlapped with each other and bonded together A packaging body inspection method for inspecting an overlapping state of the joint portion with respect to a packaging body in which a portion is formed, wherein markers are individually distinguishable from each other in advance along the width direction at both end portions of the resin film. After the overlap between the two end portions of the resin film, the distance between the pair of markers at the joint is measured, and when the distance is equal to or greater than a predetermined distance, it is determined that the overlap state is good. By the way.

According to the above aspect , by measuring the separation distance between the markers provided at both ends of the resin film, it is easier to grasp the overlap state between the both ends of the resin film, based on the degree of the overlap state. It becomes easy to judge the strength of the joint.
Therefore, as shown in FIG. 3, when the separation distance is equal to or greater than a predetermined distance, it is determined that the overlap state is good, thereby confirming the packaging state of a plurality of packaging containers made of a resin film, and the packaging body is a distribution step. It has become possible to prevent troubles that would otherwise be scattered.
Further, in measuring the distance between a pair of markers formed at both ends of each resin film, particularly when the resin film wound around a plurality of packaging containers is transparent, as shown in FIG. Thus, when it is difficult to judge the difference between the case where both ends of the resin film are separated without overlapping and the case where they overlap as usual, a pair of markers are formed so as to be individually distinguishable from each other. As shown in FIG. 5 (b), by determining the relative positional relationship of the markers, it is possible to determine the presence or absence of overlap, and to reliably determine the packaging state and prevent troubles during distribution. It became easy.

In a preferred feature of the present invention, the separation distance between the markers is measured at all locations in the longitudinal direction of the marker, and the separation distance is equal to or greater than a predetermined distance at all locations in the longitudinal direction of the marker. The overlap state is judged to be good.

According to the said characteristic structure, an overlap state can be judged over the full width of a strip | belt-shaped resin film by measuring the separation distance between markers in all the locations of the longitudinal direction of the said marker.
Therefore, as shown in FIG. 4, when the separation distance is equal to or greater than the predetermined distance at all locations in the longitudinal direction of the marker, it is easy to determine the bonding state at the bonding portion more accurately by determining that the overlap state is good. The reliability of the packaging body made of a resin film can be easily increased.

One preferable characteristic configuration of the present invention is that the color of the marker provided at both ends of the resin film is made different so as to be individually identifiable.

According to the above characteristic configuration, the markers provided on both ends of the resin film can be individually identified by different colors, so that a pair of markers can be identified individually, and whether or not there is an overlap and the amount of overlap Can be judged.

According to a preferred feature of the present invention, a first marker is provided at one end of the resin film, a second marker is provided at the other end, and a second marker is provided at the other end side of the joint at the other end. When the marker is located, it is determined that the overlap state is good.

According to the above characteristic configuration, when the second marker is positioned on the other end side of the first marker at the joint, it is determined whether or not both ends of the resin film overlap each other. By judging that, overlap can be confirmed surely.

A preferred characteristic configuration of the present invention is that the resin film is a heat-shrinkable resin film, and hot air is applied to the resin film wound around the plurality of packaging containers so that the joint portion is integrated by heat fusion. There is somewhere.

According to the above characteristic configuration, when forming a package body made of a resin film, hot air is applied to the resin film and the joints are integrated by heat fusion, thereby making the distribution easier and more integrated. A package that can withstand it can be formed.

In another aspect of the present invention, in a state where a plurality of packaging containers are arranged, a transparent or translucent belt-shaped resin film is wrapped and wrapped around them, and both end portions of the resin film are overlapped with each other. A wrapping apparatus for forming a joint portion, and a wrapping body inspection device for inspecting an overlap state of the joint portion with respect to a wrapping body in which the resin film is wound around a packaging container by the wrapping device, A measuring device is provided for measuring a separation distance between the pair of markers in the joint portion after the resin film provided with individually distinguishable markers along the width direction is wrapped in a packaging container by the wrapping device, A determination device that determines that the overlap state is good when the separation distance measured by the measurement device is equal to or greater than a predetermined distance. There is in the place where is provided.

According to the above aspect of the present invention, the packaging film is wrapped by the wrapping device using the resin film in which the markers along the width direction are provided at both ends, and the measuring device is used to wrap the pair of markers. By measuring the separation distance, it is easy to grasp the joining state of the overlap portion even if the resin film is a transparent and difficult to recognize material. Moreover, by providing a discriminating device that determines that the overlap state is good when the separation distance measured by the measuring device is equal to or greater than a predetermined distance, the quality control of the package is easy and can be performed automatically.
Further, in measuring the distance between a pair of markers formed at both ends of each resin film, particularly when the resin film wound around a plurality of packaging containers is transparent, as shown in FIG. Thus, when it is difficult to judge the difference between the case where both ends of the resin film are separated without overlapping and the case where they overlap as usual, a pair of markers are formed so as to be individually distinguishable from each other. As shown in FIG. 5 (b), by determining the relative positional relationship of the markers, it is possible to determine the presence or absence of overlap, and to reliably determine the packaging state and prevent troubles during distribution. It became easy.

It is a whole perspective view of a lapping apparatus. It is operation | movement explanatory drawing of a wrapping apparatus. (A) is a perspective view from the bottom with respect to the package, (b) is a good bottom view with a large overlap state, and (c) is a bottom view with a small overlap state. (a) is a bottom view of a package with a good overlap state, and (b) is a bottom view of a package with a poor overlap state. (A) is the perspective view and bottom view of a comparative example, (b) is one perspective view and bottom view of this embodiment. It is a bottom view of the package which shows a film winding malfunction state. It is explanatory drawing of the package bottom face which shows an inspection method, (a) shows the state of normal time, (b) shows the time of film bending.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1 to FIG. 3, a plurality of polyester resin packaging containers (PET bottles) 1 are grouped and aligned in a transport path for transporting a plurality of polyester resin packaging containers (PET bottles) 1 by a conveyor 2. A film mounting portion 5 (FIGS. 1 to 2) for wrapping and packaging a transparent or semi-transparent heat-shrinkable strip-like resin film (shrink film) 4 around the packaging container 1 is provided. The shrink tunnel part 7 (FIG. 2) which makes the both ends of the film 4 overlap each other in the bottom part of the packaging container 1, and fuse | melts the overlap part with the blowing hot air from below, and integrates it as the junction part 6 (FIG. 2). The wrapping device 8 is configured.

  On the lower side of the wrapping device 8, when the overlap amount of the joint portion 6 is insufficient with respect to the package body 9 in which the shrink film 4 is wound around the packaging container 1 (FIG. 3C), Since there is a possibility that the packaging state by the shrink film 4 collapses and a plurality of packaging containers 1 break apart and fall apart, a packaging body inspection device 10 for inspecting the overlapping state of the joint portion 6 is provided. .

  The packaging body inspection apparatus 10 wraps the shrink film 4 provided with the line-shaped markers M along the width direction at both ends, after the packaging container 1 is wrapped by the wrapping device 8, and then the bottom surface of the packaging container 1 by the lighting device 18. A measuring device 11 that measures the separation distance between the pair of markers M in the joint 6 while applying light to the side is provided, and when the separation distance measured by the measuring device 11 is greater than or equal to a predetermined distance (FIG. 3B). A determination device for determining that the overlap state is good is provided.

  The measuring device 11 is provided with an image pickup device 13 including a camera or the like that takes an image of the bottom surface of the packaging container 1 and analyzes the image, and can measure a separation distance between the markers M based on image data from the image pickup device 13. It is configured.

[Another embodiment]
Other embodiments will be described below.

<1> As the packaging container 1 around which the resin film 4 is wound, the example of the PET bottle has been described, but cans, bottles, and the like are included.
<2> In order to form the package 9 by wrapping the resin film 4 around the packaging container 1, the package 9 includes a plurality of trays made of corrugated cardboard, called a half tray, which has a bottom surface portion and a low side surface portion. In a state in which the packaging containers 1 are arranged, a plurality of packaging containers 1 are wound and integrated with the resin film 4 for each half tray, or a plurality of corrugated cardboard boards called pads. This includes a case where a plurality of packaging containers 1 are wound around a resin film 4 and integrated with the pads in a state where the packaging containers 1 are arranged.
<3> The joining portion 6 in the shrink film 4 may be integrated by adhering with a hot-melt adhesive instead of heat-bonding and integrating resin films that overlap each other. Good.
<4> When measuring the separation distance between a pair of markers M formed on both ends of the shrink film 4 to determine the overlap state, as shown in FIGS. Is relatively slanted, it is only necessary to be able to determine, for example, that the minimum separation distance between the markers M is equal to or greater than a set value (FIG. 4A) by the determination device.
<5> Further, when measuring the separation distance between the pair of markers M formed at both ends of the shrink film 4 to determine the overlap state, the shrink film 4 is particularly formed as shown in FIG. When it is transparent and difficult to recognize, both ends of the resin film are not overlapped and separated abnormally (state diagram on the right side of FIG. 5A) and when they overlap normally (FIG. 5A) ) The difference from the left side state diagram) may be difficult to judge. In this case, it is necessary to form the pair of markers M so that they can be individually identified. Therefore, for example, as shown in FIG. 5 (b), the pair of markers M are changed to different color lines or differently shaped markers M. And in a discrimination device, while providing the 1st marker M1 in the one end part of a resin film, the 2nd marker M2 is provided in the other end part, and the 2nd marker is located in the other end part side rather than the 1st marker M1 in the junction part 6. When M2 is located (state diagram on the left side of FIG. 5B), it is possible to accurately determine the overlap state by determining that the overlap state is good.
<6> As shown in FIG. 6, as the winding failure of the shrink film 4, when the film bent bottom portion 20 occurs at the time of film winding, depending on the size of the bent state, the overlap state may be deteriorated. As a first discriminating method, the film edge position (XY direction) is measured, the degree of film bending is judged, and the film edge position is judged to be defective when the film edge position is shifted beyond a set value. As a second determination method, the areas of the first marker M1 and the second marker M2 are measured, and when those measured values are equal to or less than a set value, it is determined as defective. As a third determination method, as shown in FIGS. 7A and 7B, the first marker M1 and the second marker M2 can be compared with the second marker when the film is bent as shown in FIG. When a folded marker line enters the inspection frame A set between the marker M2 and the marker M2, it is determined as defective. Such inspection methods are conceivable.
<7> As another embodiment of the package inspection apparatus 10, an illumination device 18 that irradiates light to the joint portion 6 is provided even if the marker M is not provided on the shrink film 4, and the amount of light reflected from other parts is reduced. A measuring device 11 that measures the area of the joint 6 while identifying the joint 6 according to a difference is provided, and a determination device that determines that the overlap state is good when the area of the joint 6 measured by the measuring device 11 is a predetermined amount or more May be provided.

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Packaging container 4 Resin film 6 Junction part 11 Measuring apparatus 12 Discriminating apparatus 18 Illuminating device M Marker M1 1st marker M2 2nd marker

Claims (6)

In a state where a plurality of packaging containers are arranged, a transparent or translucent belt-shaped resin film is wrapped around and wrapped in a lump,
For the packaging body in which both ends of the resin film overlap each other to form a joint,
A package inspection method for inspecting an overlapping state of the joint part,
In each of the both ends of the resin film in advance along the width direction, provided with markers that can be individually identified ,
After the overlap between both ends of the resin film, measure the separation distance between the pair of markers in the joint,
A package inspection method for determining that the overlap state is good when the separation distance is equal to or greater than a predetermined distance. The distance between the markers is measured at all locations in the longitudinal direction of the marker, and the overlap state is determined to be good when the distance is greater than or equal to a predetermined distance at all locations in the longitudinal direction of the marker. package inspection method according to 1. The package inspection method according to claim 1 or 2 , wherein the markers provided at both ends of the resin film are made different in color so that they can be individually identified. While providing a first marker at one end of the resin film and providing a second marker at the other end,
The package inspection method according to any one of claims 1 to 3 , wherein when the second marker is positioned on the other end side of the first marker at the joint, the overlapping state is determined to be good. The resin film is a heat-shrinkable resin film;
The package inspection method according to any one of claims 1 to 4 , wherein hot air is applied to the resin film wound around the plurality of packaging containers, and the joint portion is integrated by heat fusion. A wrapping device for forming a joint by wrapping a plurality of packaging containers in a lump by wrapping and wrapping them with a transparent or translucent belt-shaped resin film in a lump, and overlapping both ends of the resin film with each other Provided,
For a package in which the resin film is wrapped around a packaging container by the wrapping device,
A package inspection apparatus for inspecting the overlapping state of the joint part,
Measurement that measures the separation distance between the pair of markers at the joint after the resin film provided with markers that can be individually identified along the width direction at both ends is wrapped by the wrapping device. Equipment,
A package inspection apparatus provided with a determination device that determines that the overlap state is good when the separation distance measured by the measurement device is equal to or greater than a predetermined distance.

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