JP2012098306A - Method and device for inspecting label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for inspecting labels capable of inspecting the quality of a label stuck to a container, in the interior of a labeller.SOLUTION: This device for inspecting the label includes: a labeller 1 for sticking a label 7 onto a container 2 revolving along a revolution track 3a while rotating; at least a pair of imaging means 12a-12d installed in the both sides of the revolution track 3a of the labeller 1 facing each other at a front face direction of the label or a side face direction of the label; image measuring/computing means 22 for measuring a feature point of the label 7 stuck to the container 2, based on an image of the container 2 captured by the imaging means 12a-12d; quality determination reference value setting means 23 for setting a reference value for determining the quality of the label 7; and quality determination computing means 25 for comparing and computing the feature point measured by the image measuring/computing means 22 with the reference value and determining the quality of the label 7. All required is just installing the imaging means 12a-12d in the labeller, and this device can be easily and inexpensively applied even to an existing labeller.

Description

  The present invention relates to a label inspection method and apparatus for inspecting the quality of a label attached to a container such as a beverage.

A label in which a manufacturer name, a quality indication, and the like are printed is attached to a container in which a beverage or the like is conventionally stored.
These labels are automatically affixed to predetermined portions of the container by a label affixing device called a labeler, but some labels have a plurality of labels affixed depending on the type of contents.
The label affixed to the container is different from the quality of the contents filled in the container, but because the information that defines the quality of the contents is clearly stated on the label, a label different from the contents is affixed to the container. If it is sold, problems such as product liability will arise.
In addition, the design of the label has the effect of increasing the value of the product or enhancing the corporate image, but if the label is not affixed correctly, it may reduce the image of the product or plan.

For this reason, for example, Patent Documents 1 and 2 have filed patent labeling methods and apparatuses for inspecting whether or not there is a label affixed to a container and whether it is correctly affixed at a predetermined position.
In the label inspection method and apparatus described in Patent Document 1, a container with a plurality of labels is imaged with a TV camera from both sides facing each other across the container, and a plurality of images are obtained from the obtained camera image. The label sticking position and the sticking interval are obtained by using a relational expression between the imaging coordinates and the actual dimensions of the container, and the label sticking position and the sticking interval are inspected for good and bad.
On the other hand, the label affixing position inspection method and apparatus described in Patent Document 2 allow light emitted from a light source to pass through the first polarizing filter, and then pass through the vicinity of the upper edge of the label affixed bottle. By passing through a second polarizing filter that passes light of vibration in a direction substantially perpendicular to the one polarizing filter, light other than the light that has passed through the label is cut, and the light that has passed through the second polarizing filter is subjected to image processing. It is configured to inspect the label attachment position.
JP-A-7-243808 JP 2002-296209 A

However, as in the label inspection apparatus described in Patent Documents 1 and 2, when the label is inspected with respect to the container that is linearly transported after the label is pasted by the labeler, the container is in close contact or in proximity If the paper is transported in a state where there is a difference or the direction of the label varies, there is a problem that the label inspection becomes difficult.
For this reason, since it is necessary to newly provide the transport means with an interval between the containers and to align the direction of the labels, there are problems such as a large apparatus and increased equipment costs.
On the other hand, containers such as glass bottles containing beverages such as beer are formed in a cylindrical shape, and a plurality of labels are often attached to the outer peripheral surface of the container.
These labels are affixed by a rotary labeler that affixes a label to the outer peripheral surface of the container while rotating the container. The rotary labeler revolves an annular revolving track while rotating the container by a rotation mechanism. Attach a label with a single-sided adhesive surface to a predetermined position of the container that rotates by means of the labeling means installed in the vicinity of the container, and then apply the label with a scissoring means such as a brush. It is comprised so that a label may contact | adhere.

Further, the rotary type labeler is suitable for inspecting the label because the distance between the containers moving on the revolution track is constant and the container moves on the revolution track in synchronization with the rotation and revolution.
However, in the existing labelers, a label sticking means for sticking a label to the container and a sticking means for sticking the label affixed to the container and sticking it to the container are installed around the revolution track.
In particular, in a labeler that affixes a plurality of labels to a container, the number of label affixing means and brooming means increases, so that there is almost no space for installing a label inspection apparatus.
For this reason, in the past, label detection means such as photoelectric sensors were installed in a small space on the labeler to inspect the presence or absence of the label affixed to the container, and the labeled container was shipped as a good product. There is a problem that inspection cannot be performed until the state of the label, such as whether the predetermined label is correctly attached at a predetermined position.
The present invention has been made to remedy such a problem, and an object of the present invention is to provide a label inspection method and apparatus capable of inspecting the state of a label attached to a container in a labeler.

  The label inspection method of the present invention is directed to a labeler that affixes a label to a container that revolves while revolving, with the revolving trajectory interposed therebetween, and at least a pair of imaging units in the front direction of the label or the side surface direction of the label. The imaging unit is provided with a first and a second imaging unit facing each other with a revolution trajectory in between and an incident light side of each of the first and second imaging units in order, and the deflection direction is set to each other. Two different deflecting means, and an illumination means for a container provided between the two deflecting means, and the image attached to the container from the image of the container taken by the imaging means The feature point of the label is measured, and the obtained feature point is compared with a preset reference value to determine the quality of the label attached to the container.

According to the above method, not only the presence / absence of a label attached to the container but also the state of the label can be inspected, so that problems such as shipment of defective products can be prevented.
Moreover, since the quality of the label can be inspected in the labeler, it is not necessary to provide a means for increasing the interval between the containers or aligning the direction of the label. it can.

  In the label inspection method of the present invention, the judgment criteria items for the label quality are: presence / absence of label, backing, upside down, different label, label size and position, label spacing, label inclination, presence / absence of printing, and lack of printing Is at least one item.

  By the said method, since the quality of the label affixed on the container can be test | inspected from all angles, test | inspection quality can be improved.

  The label inspection apparatus of the present invention is disposed opposite to a labeler that attaches a label to a container that revolves around a revolving track while rotating, with the revolving track of the labeler interposed therebetween, and is installed in the front direction of the label or the side surface direction of the label. And at least a pair of imaging units, image measurement calculation means for measuring the feature points of the label attached to the container from the image of the container captured by the imaging unit, and a reference value for determining the quality of the label The imaging unit includes: a set pass / fail judgment reference value setting means; and a pass / fail judgment computing means for comparing the feature points measured by the image measurement computing means and the reference value to judge pass / fail of the label, Are the first and second imaging means opposed to each other with the revolution trajectory in between, and two deflecting means provided in this order on the incident light sides of the first and second imaging means and having different deflection directions. When, An illumination means of the container disposed between the two deflection means is obtained comprising a.

With the above configuration, not only the presence / absence of a label affixed to the container, but also the state of the label can be inspected in the labeler, so there is no need to newly provide a means for opening the container or aligning the direction of the label As a result, the present invention can be easily applied to an existing labeler, and no special modification is required. Therefore, problems such as a large apparatus and increased equipment costs can be solved.
In addition, when it is applied to an existing labeler, it is only necessary to install a plurality of imaging means in the labeler, so there is no need to adjust the labeler while it is in operation for a long time or to modify the labeler control system. Therefore, it is easy to introduce into existing labelers and there is no worry of lowering productivity.

  The label inspection apparatus of the present invention includes the following criteria items for determining whether or not a label is good: label presence / absence, backing, upside down, dissimilar label, label size and position, label spacing, label inclination, presence / absence of printing, and lack of printing Is at least one item.

  With this configuration, the quality of the label attached to the container can be inspected from all angles, so that the inspection quality can be improved.

  The label inspection apparatus of the present invention is provided with an illuminating means for illuminating the container and a polarizing means comprising at least a pair of polarizing filters whose polarization directions intersect each other between the imaging means and the revolution orbit.

  With the above-described configuration, it is possible to prevent light from the illuminating means arranged oppositely from interfering with each other or diffusely reflected by the container, so that the light enters the imaging means. Can capture clear images.

  The label inspection apparatus of the present invention is provided with an image composition means for compositing images of containers taken by the image pickup means.

  With the above-described configuration, since the feature points can be measured in a state where the images captured by the plurality of imaging units are combined, it is possible to efficiently use the image information captured by each imaging unit and the visibility of the inspection result image. In addition, the management of the image data can be simplified by storing the synthesized image in the image memory.

  According to the label inspection method and apparatus of the present invention, not only the presence / absence of a label affixed to a container, but also the state of the label can be inspected in the labeler, so that the interval between containers can be increased or the direction of the label can be aligned. There is no need to provide a new means, which makes it possible to easily and inexpensively implement existing labelers.

Embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view of a labeler on which a label inspection apparatus is installed, FIG. 2 is an enlarged view of the label inspection apparatus, FIG. 3 is a block diagram thereof, and FIGS.
A labeler 1 shown in FIG. 1 is installed on the downstream side of a filling line (not shown) for filling containers 2 with contents such as beverages, and has a variable speed rotary 3 that rotates in a certain direction. Yes.
In the periphery of the rotary 3, loading means 4 is provided for taking the container 2 carried out from the filling line into the rotary 3, and the container 2 taken in by the loading means 4 is arranged on the revolution track 3 a of the rotary 3. It is placed on the receiving tray 3b in a state where rotation is constrained.
The tray 3b is formed in a disc shape, is arranged at equal intervals on the revolution track 3a of the rotary 3, and rotates in a certain direction while being rotated synchronously by a rotation means (not shown). The container 2 taken in by the means 4 is revolved on the revolving track 3a in a certain direction along with the rotation of the rotary 3, while being rotated together with the tray 3b by the rotating means.

On the outer peripheral side of the rotary 3, a first label sticking means 5 and a second label sticking means 6 are installed with an interval in the rotational direction of the rotary 3.
The first label affixing means 5 and the second label affixing means 6 affix a plurality of labels 7 on the container 2, and the first label affixing means 5 is a front label displaying product information, company information such as a trademark, etc. 7a is attached to the front surface of the container 2 and the neck label 7b is attached to the neck portion of the container 2. A large number of front labels 7a and neck labels 7b whose back surfaces are adhesive surfaces are set in advance. However, when the revolving container 2 reaches the label application position A shown in FIG. 1, the front label 7a and the neck label 7b are applied to the outer peripheral surface of the container 2 at the same time.

On the downstream side of the first label sticker 5, the attaching means 9 with the first rod is installed on both sides of the revolution track 3 a.
The first hooking means 9 is formed by a pair of hooking brushes 9a and 9b that are curved along the revolution trajectory.
When the container 2 that revolves on the revolving track 3 a while rotating is carried between the brushes 9 a and 9 b with each hook, the front label 7 a and the neck label 7 b are pressed against the outer peripheral surface of the container 2 as the container 2 rotates. Thus, the adhesive surfaces of the labels 7 a and 7 b are brought into close contact with the container 2.
The second label sticking means 6 sticks the back label 7c to the back surface of the container 2 when the front face 7a is attached to the front face of the container 2. The back label 7c has a quality label, a manufacturer name, etc. Is printed.
The back label 7c also has an adhesive surface on the back surface, and a large number of sheets are set in advance in the second label attaching means 6, and the container 2 that revolves while rotating has reached the label attaching position B shown in FIG. The back label 7c is affixed to the back surface of the container 2. At this time, the rotation means that rotates in synchronization with the rotor 3 faces the back surface of the container 2 that has reached the label affixing position B and the second label affixing means 6. Thus, the direction of the sticking position of the container 2 is controlled.

The first scissor attaching means 10 installed on the downstream side of the second label attaching means 6 attaches the back label 7c attached to the container 2 by the second label attaching means 6 with the scissors, and attaches the adhesive surface of the back label 7c to the container. 2 is composed of a scissors brush 10a provided outside the revolution track 3a and a scissors brush 10b provided inside the revolution track 3a.
The scissor brush 10a provided on the outer side of the revolution track 3a is located at a position close to the second label sticking means 6, and the scissor brush 10b provided on the inner side of the revolution track 3a is separated from the second label sticking means 6. The outer peripheral surface of the container 2 that has been installed on the revolving track 3a while rotating and is boiled with a time lag so as not to damage the attached front label 7a and neck label 7b. The adhesive surface of the back label 7c is brought into close contact with the container 2.

And the label detection means 12 which comprises the label inspection apparatus of this invention is installed in the upstream and downstream of the scissors brush 10b which forms the scissors 10 with the 2nd scissors.
The label detection means 12 is composed of imaging means 12a, 12b, 12c, 12d composed of a total of four CCD cameras, facing each other across the revolution track 3a.
The reason why each of the image pickup means 12a to 12d of the label detection means 12 is arranged at this position is that the container 2 to which the back label 7c is attached by the second label attachment means 6 is attached to the upstream side of the attachment means 10 with the second basket. The back label 7c is directed to the outside of the revolving track when the brush 10a is applied with a scissors, and then the back label 7c is directed to the inside of the revolving track 3a when the back label 7c is applied with the scissors brush 10b on the downstream side. This is because the front of the container 2 faces the outside of the revolution track 3a at the time when the attachment of the claw 7c is completed.
Accordingly, by installing the label detection means 12 on the upstream side and the downstream side of the bald brush 10b, the imaging means 12a, 12b on the upstream side images between the front label 7a and the back label 7c and between the front label 7a and the neck label 7b. Then, the front label 7a, the neck label 7b, and the back label 7c can be imaged from the front by the imaging means 12c and 12d on the downstream side.

Ring-shaped illumination that illuminates the imaging surface of the container 2 in front of the imaging means 12a, 12b and 12c, 12d arranged opposite to each other with the revolution track 3a interposed therebetween, that is, between each of the imaging means 12a to 12d and the revolution track 3a. Means 13 and polarizing means 14 installed before and after the illumination means 13 are provided.
The polarizing unit 14 prevents the imaging units 12a, 12b and 12c, 12d arranged opposite to each other from interfering with each other, and at the same time, the light illuminated by the illumination unit 13 is irregularly reflected by the container 2 and enters the imaging units 12a to 12d. A first polarizing filter 14a that passes, for example, longitudinal wavelengths on the imaging means 12a to 12d side, and a second polarizing filter 14b that passes, for example, lateral wavelengths on the opposite side, The images taken by the respective imaging means 12a to 12d of the label detection means 12 are input to the image processing device 17 shown in FIG. It is like that.

The container detection means 16 is formed by an optical sensor or the like, and is installed in the vicinity of the input side of the second label sticking means 6 as shown in FIG. Detection is performed by contact, and a detection signal (pulse signal) is sent to the image processing device 17.
The image processing device 17 includes an A / D conversion unit 18 that A / D converts the image signal sent from the label detection unit 12 into digital image data, and image data that has been A / D converted by the A / D conversion unit 18. The image memory 19 stores the image data for each of the imaging units 12a to 12d, and the image data captured by the imaging units 12a, 12b, 12c, and 12d facing each other out of the images stored in the image memory 19 are combined. Then, the image synthesizing unit 20 for making one image, the synthesized image memory 21 for storing one image synthesized by the image synthesizing unit 20, and the synthesized image data stored in the synthesized image memory 21 are read out. Image measurement calculation means 22 for measuring feature points from image data, and pass / fail judgment reference value setting means 23 in which a reference value necessary for judging pass / fail of a label is preset as a threshold value, A reference value memory 24 that reads a reference value necessary for pass / fail judgment from the pass / fail judgment reference value setting unit 23 and temporarily stores it, feature measurement data output from the image measurement calculation unit 22, and pass / fail read from the reference value memory 24. It is composed of a pass / fail judgment calculating means 25 for comparing pass / fail with a judgment reference value (threshold value) and judging pass / fail.
The determination criteria items for the label quality set in advance in the quality determination reference value setting unit 23 include the presence / absence of a label, back-fitting, upside down labeling, different labels, label dimensions and positions, label spacing, label inclination, The presence or absence of printing, lack of printing, etc., may be at least one of these items.

On the other hand, the container 2 that has made almost one revolution on the revolution track 3a by the rotary 3 is unloaded from the revolution track 3a by the container unloading means 27 installed in the vicinity of the container loading means 4.
The container carrying-out means 27 is provided with a sorting means 28 so that the non-defective product 2a is sorted to the non-defective product transport line 28 and the defective product 2b is sorted to the defective product transport line 29 according to the pass / fail signal output from the image processing apparatus 17. It has become.
At this time, if the signal output from the image processing device 17 is operated only with a non-defective product signal, only a non-defective product flows to the non-defective product transfer line 28, and a non-defective product is a fail-safe system that flows to the defective product transfer line 29.

Next, a label inspection method using the label inspection apparatus configured as described above will be described.
The containers 2 filled with the contents in the contents filling step reach the container carrying means 4 continuously, and are provided at equal intervals on the revolving track 3a of the rotary 3 by the container carrying means 4 that rotates synchronously with the rotary 3. It is carried on the tray 3b and restrained by a restraining means (not shown) so as to rotate integrally with the tray 3b.
The tray 3b moved on the revolution axis 3a by the rotary 3 is rotated in synchronization with the rotation of the rotary 3 by the rotation mechanism, so that the container 2 restrained and placed on the tray 3b is also rotated in synchronization with the rotary 3.

Thereafter, the front label 7a and the neck label 7b are affixed to the outer peripheral surface of the container 2 that has reached the first label affixing means 5 by the first label affixing means 5. The adhesive surfaces of the front label 7 a and the neck label 7 b are in close contact with the outer peripheral surface of the container 2 while moving between the two.
When the container 2 that has passed through the attaching means 9 with the first scissors passes through the container detecting means 16 provided in front of the second label attaching means 6, a container detection signal is output to the image processing device 17.
The image processing apparatus 17 uses the container detection signal sent from the container detection means 16 and the current rotational speed of the rotary 3 to move the detected amount of the container 2 between the imaging means 12a and 12b at the beginning of the label inspection means. And a timing signal delayed by the amount of movement is output to the label detecting means 12.
After that, the container 2 that has reached the second label pasting means 6 is pasted with the back label 7c by the second label pasting means 6, and the adhesive surface of the back label 7c is placed in the container by the one scissor brush 10a of the second scissors attaching means 10. 2 is in close contact with the outer peripheral surface.

When the container 2 that has passed through the scissoring brush 10a reaches the first imaging position C between the upstream imaging units 12a and 12b forming the label inspection unit 12, the container detection unit 16 detects the image and the image processing device 17 The imaging means 12a and 12b are simultaneously operated by the timing signal delayed by the above, and the container 2 passing between the imaging means 12a and 12b is imaged.
At this time, when the surface to which the front label 7a of the container 2 is attached is the front, the left and right side surfaces of the container 2 are imaged by the imaging means 12a and 12b as shown in FIG.
The light of the illumination means 13 that is turned on when imaging the container 2 first cuts the light that vibrates in the vertical direction when passing through the first polarizing filter 14a. Reach and illuminate the container 2.
The light reflected from the container 2 passes through the second polarizing filter 14b and reaches the imaging means 12a and 12b, but when passing through the second polarizing filter 14b, the light that vibrates in the horizontal direction is cut and vibrates in the vertical direction. Only the light that reaches the imaging means 12a, 12b.
As a result, the light irregularly reflected by the container 2 and the diffused light from the opposing illumination means 13 do not reach the imaging means 12a and 12b, so that stable images of the left and right side surfaces of the container 2 to which the label 7 is attached are taken as the imaging means. Images can be clearly captured by 12a and 12b.

The images captured by the imaging units 12a and 12b are sent to the image processing device 17, and converted into digital image data by the A / D conversion unit 18 of the image processing device 17, and then the images are captured for the respective imaging units 12a and 12b. Stored in the memory 19.
Thereafter, the image synthesizing unit 20 of the image processing device 17 synthesizes the two images stored in the image memory 19 into one image as shown in FIG. Stored in the composite image memory 21.
The composite image data stored in the composite image memory 21 is read out to the image measurement calculation means 22, and feature points necessary for quality determination and extraction are performed as follows.

That is, in FIG. 4B, the heights y1 and y3 from the preset reference point in the vertical axis direction (for example, the bottom of the container) to the neck label 7b and the heights y2 and y4 to the front label 7a are measured.
Further, distances x1, x4 from the reference point in the horizontal axis direction (for example, the center of the container 2) to the end of the neck label 7c, distances x2, x5 to the end of the front label 7a, and the end of the back label 7c. Each distance x3 is measured.
Then, the position of the label 7 is calculated from the above measured values and extracted as feature points.
That is, the presence / absence of the front label 7a and the neck label 7b and the vertical displacement are measured from the feature points y1 to y4, and the inclination of the front label 7a and the neck label 7b is calculated from the difference between the feature points y1 and y3 and y2 and y4. And extracted as feature points.
Further, the distance between the end points of the front label 7a and the back label 7c is calculated from the feature points x1 to x5, and the horizontal displacement of the front label 7a and the neck label 7b from the distance between the feature points x1 and x2 and x4 and x5, Extract horizontal turning, horizontal double sticking, etc.
Further, from the interval between the feature points x2 and x3, the horizontal displacement, horizontal turning, horizontal double sticking, and the like of the front label 7a and the back label 7c are extracted.
The feature point data calculated and extracted by the image measurement calculation means 22 is sent to the pass / fail judgment calculation means 25, read in advance from the pass / fail judgment reference value setting means 23 and stored in the reference value memory 24 (threshold value). ) And the quality of the container 2 imaged by the imaging means 12a and 12b of the label inspection means 12 is determined.

On the other hand, the container 2 that has passed the scissor brush 10b with the imaging means 12a, 12b reaches the second imaging position D between the imaging means 12c, 12d next to the label inspection means 12.
At this time, the container 2 rotates about 90 degrees with respect to the first imaging position C and reaches the second imaging position D, so that the front surface of the front label 7a and the front surface of the back label 7c are shown in FIG. 5 by the imaging means 12c and 12d. Images are taken as shown in (a).
In addition, since the effect | action of the illumination means 13 and the polarization means 14 is the same as the above, description is abbreviate | omitted.
The images picked up by the image pickup means 12 c and 12 d are sent to the image processing device 17, processed in the same manner as when picked up by the image pickup devices 12 a and 12 c, and then stored in the composite image memory 21.
FIG. 5B is image data captured by the imaging means 12c and 12d and synthesized into one image. This synthesized image data is read by the image measurement calculation means 22 and has the same characteristics as described above. A point is extracted.
As characteristic points, the width in the vertical direction of the neck label 7b is Δy1, the width in the vertical direction of the front label 7a is Δy2, the width in the height direction of the back label 7c is Δy3, from the reference point (bottom of the container) The height to the upper edge of the back label 7c is measured as y5, and the horizontal width of the back label 7c is measured as Δx1, and each measured value is calculated to extract a feature point.

Then, it is possible to extract the vertical turning and double sticking of the labels 7a to 7c from the feature points Δy1 to Δy3, it is possible to extract the vertical displacement of the back label 7c from the feature point y5, and the front labels 7a and 7c The inclinations of the front label 7a and the back label 7c can be extracted by measuring the height to the upper edge at a plurality of locations.
Since each label 7a-7c is imaged from the front to obtain image data, a unique pattern on the design is registered in advance in the memory of the image processing device 17 as a dictionary, and the vicinity of the position where the pattern originally exists By performing the template matching process at, it is possible to inspect for defects such as a foreign label being stuck on the container 2 or a label 7 being stuck upside down.
In addition, by measuring the area brightness at a predetermined location, the presence or absence of the label 7 and the front and back of the label 7 can be inspected, and some labels 7 are printed with a quality retention period or the like. In the case of such a label 7, it is possible to inspect for non-printing and printing defects, and by using character pattern matching and character block dimension inspection together, a more precise label inspection can be performed.

The defect determination unit 25 of the image processing device 17 compares the measurement calculation result output from the image measurement calculation means 22 with the reference value (threshold value) data read from the reference value memory 24, and the label 7 attached to the container 2. When the container 2 unloaded from the revolution track shaft 3a of the rotary 3 by the container unloading means 27 is non-defective, the container unloading means 27 unloads it to the non-defective line unloading line 28. In the case of a non-defective product, it is carried out to a defective product carry-out line 29.
As described above, it is possible to inspect the quality of the label 7 affixed to the container 2 during the label affixing process of the labeler 1 that affixes the plurality of labels 7 to the container 2, so there is a space for installing the entire label inspection apparatus. Even if the label 7 is not in the labeler, the quality of the label 7 affixed to the container 2 can be inspected by the label inspection device, and this can be easily and inexpensively performed on an existing labeler.

In the above-described embodiment, the example in which the front label 7a, the neck label 7b, and the back label 7c are attached to the container 2 has been described. However, the number of labels 7 is not limited to these numbers. .
When the number of labels 7 is small or the positions of the labels are limited, the quality of the label 7 can be inspected only by the pair of imaging units 12a and 12b of the label inspection unit 12.

It is a top view of the labeler in which the label detection means which comprises the label inspection apparatus which becomes embodiment of this invention was installed. It is an enlarged view of the label detection means which comprises the label inspection apparatus which becomes embodiment of this invention. It is a block diagram of the label inspection apparatus which becomes embodiment of this invention. It is operation | movement explanatory drawing of the label inspection apparatus which becomes embodiment of this invention. It is operation | movement explanatory drawing of the label inspection apparatus which becomes embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 Labeler 2 Container 3 Rotary 3a Revolving track 3b Receptacle 12 Label detection means 12a, 12b Imaging means 12c, 12d Imaging means 13 Illumination means 14 Polarization means 14a Polarization filter 14b Polarization filter 17 Image processing device 20 Image composition means 22 Image measurement calculation means 22 23 pass / fail judgment reference value setting means 25 pass / fail judgment calculating means

Claims (7)

  A label that attaches a label to a container that revolves around a revolving track while rotating, is opposed to the label with the revolving track interposed therebetween, and at least a pair of image pickup units are installed in the front direction of the label or the side surface direction of the label. The first and second imaging means facing each other across the revolution trajectory, and two deflection means provided in order on the incident light side of the first and second imaging means and having different deflection directions. And an illumination means for the container provided between the two deflecting means, and measuring the characteristic point of the label attached to the container from the image of the container imaged by the imaging means A label inspection method comprising: comparing and calculating the obtained feature point and a preset reference value to determine the quality of the label attached to the container.   The judgment criteria items for the quality of the label are at least one item of presence / absence of the label, backing, upside down, different label, label size and position, label interval, label inclination, presence / absence of printing, and lack of printing The label inspection method according to claim 1.   A labeler that attaches a label to a container that revolves around a revolution trajectory while rotating, and at least a pair of imaging units that face each other across the revolution trajectory of the labeler and that are installed in the front direction of the label or the side surface direction of the label; An image measurement calculation means for measuring a feature point of the label attached to the container from an image of the container imaged by the imaging unit, and a pass / fail judgment reference value setting in which a reference value for judging pass / fail of the label is set And a quality determination calculation means for determining the quality of the label by comparing and calculating the feature point measured by the image measurement calculation means and the reference value, and the imaging unit is opposed to the revolution trajectory. First and second imaging means, two deflection means provided in order on the incident light side of each of the first and second imaging means and having different deflection directions, and the two deflection means. In between Label inspection device comprising illumination means of the container that is, to become comprises a.   The judgment criteria items for the quality of the label are at least one item of presence / absence of the label, backing, upside down, different label, label size and position, label interval, label inclination, presence / absence of printing, and lack of printing The label inspection apparatus according to claim 3.   The label inspection apparatus according to claim 3 or 4, wherein an illuminating means for illuminating the container and a polarizing means comprising at least a pair of polarizing filters whose polarization directions cross each other are provided between the imaging means and the revolution trajectory. .   The label inspection apparatus according to claim 3, further comprising an image synthesis unit configured to synthesize the image of the container captured by each of the imaging units.   Furthermore, the label inspection apparatus as described in any one of Claims 3-6 which equips the downstream of the said 1st, 2nd affixing means with the scissors which affixes the affixed label with a scissors.

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