JPH0781839B2 - Inspection device for adhesive paper with release sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to an inspection device for a patch paper with a release sheet, which is used for a label or the like for sticking a postal parcel.

(Prior Art) Conventionally, as shown in FIG. 9 (a), this kind of adhesive paper is coated with a release sheet 4 to protect the glue portion 2 applied to the base material 1'just before use. A score line 5 is formed in the center of the release sheet 4, and a portion corresponding to the edge of the score line 5 is a glueless portion 3 so that the end portion of the release sheet 4 can be easily gripped at the time of peeling. In the figure, the lower surface of the base material 1'is the surface of the label or the like.

As shown in FIG. 2B, this adhesive sheet with a release sheet is used to remove the adhesive 2 in strips at a plurality of widthwise positions of the wide continuous paper 1'having one surface coated with adhesive to form the adhesive-free portion 3. After applying the release sheet 4 to the entire surface thereof, as shown in FIG. 2C, once the release sheet 4 is peeled from the glue portion 2 of the sticky paper 1, a slitter 13 is used to make a score line 5 in the release sheet 4. , The release sheet 4 is re-applied, but at this time, the release sheet 4 may overlap or make a gap at the score line 5, so before this is wound into a coil, that is, (( c) At point A in the figure, it is desirable to check whether the release sheet 4 is correctly applied. If this is not applied correctly, the roll shape of the product roll may be bad due to the overlapping of the gaps in the release sheet 4, or the product may stick to the adhesive paper below through the gap and write on the adhesive paper label. When doing, the gaps and overlapping parts of the release sheet 4 are stepped and caught,
Because it becomes difficult to write.

FIG. 9 (b) shows an example of a state in which the release sheet 4 is correctly attached and a state in which the release sheet 4 is not properly attached. Since a device that automatically detects the presence or absence of a device has not been developed, there is only a method of performing visual monitoring from time to time.
Sometimes a large amount of defective products are produced, and it is extremely difficult to visually judge whether the width of the glueless portion 3 is appropriate or whether the score line 5 is correctly formed in the center of the width. there were.

(Problems to be Solved by the Invention) In the present invention, in the manufacturing process of the above-mentioned adhesive sheet with release sheet 1, the opening width (b) and the overlap (c) of the cut portion of the release sheet 4 are inspected, or the adhesive is invisible from the outside. It is an object of the present invention to provide an inspection device capable of checking whether the cut line 5 is correctly formed in the width of the nose portion 3 or in the center of the width.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a sticky paper in which a cut line 5 is provided in a release sheet 4 adhered to a glue portion 2 on the back surface of the sticky paper 1, or a sticky paper. 1. A strip-shaped glueless portion 3 is formed on a part of the glue portion 2 on the back surface of 1 and a cut line 5 is provided in the center of the strip-shaped portion of the release sheet 4 adhered to the glue portion 2 facing the glueless portion 3. In the pasted paper inspection device,
A light source 6 for irradiating the glueless portion 3 is provided on one surface side of the patch paper 1 that is continuously transported in the direction in which the cut line extends, and a monitoring line orthogonal to the transport direction of the patch paper is provided on the other surface side. A one-dimensional image sensor 7 for detecting the amount of transmitted light is arranged, and the output of the image sensor 7 is time-integrated for each pixel. The portion of the cut line 5 is determined by the waveform of the time-integrated output along the monitoring line. It is characterized in that the openings and overlaps of the adhesive, the width of the glueless portion 3 and the relative position between the score line 5 and the glueless portion 3 are monitored.

(Operation) According to the configuration of claim 1, the three-layer portion of the adhesive paper base material 1 ′, the adhesive portion 2 and the release sheet 4, the two-layer portion of the base material 1 ′ and the adhesive portion 2, and the release sheet 4 are provided. The amount of transmitted light is different in the four-layer portion formed by overlapping the ends, and according to the configuration of claim 2, the adhesive paper base material 1'and the release sheet 4 have two layers at the cut line 3. Since there is a gradual level difference in the amount of transmitted light due to the opening width (b) of one layer or the overlapping part (c) of three layers formed in the center of this part and this two-layer part, measure the size of each part in the container. You can

Further, it is usually extremely difficult to use transmitted light for this kind of inspection because noise from paper fibers is large, but in the configuration of the present invention, the glueless portion 3 and the score line 5 are continuously conveyed. Since the band-shaped adhesive sheet 1 is provided in parallel with the traveling direction of the adhesive sheet 1 and the displacement in the width direction thereof is extremely gentle, noise is temporally integrated by integrating the output of the image sensor 7 with time. It can be averaged, and a practical S / N ratio can be obtained.

(Embodiment) FIG. 1 shows an embodiment corresponding to claim 1 of the present invention, which is provided at a point A in FIG. 9 (a). Reference numeral 1 denotes a long sticky paper which is rewound from a winder roll and continuously conveyed. A plurality of strips are formed on a part of a glue portion 2 applied to the back surface (upper side) of a base material 1'of the sticky paper 1. The release sheet 4 having the glueless portion 3 formed thereon and attached to the glue portion 2
There is a score line 5 in the center of the strip-shaped part facing each glueless part 3.
Is provided. A high-frequency lighting fluorescent lamp is provided below the adhesive sheet 1 as a light source 6 for irradiating the adhesive sheet along a line in the width direction thereof, that is, a monitoring line.
An image pickup camera 7 using a one-dimensional image sensor such as a CCD element for detecting the amount of transmitted light passing through the glueless portion 3 is arranged on the upper side of. 7'is a hood that shields outside light. The output of the camera 7 is input to the signal processing circuit 9 using a microprocessor via the A / D converter 8.
Here, the width of the glueless portion 3 and the relative position of the score line 5 and the glueless portion 3 are detected. Reference numeral 10 is a high-frequency lighting device for lighting the light source 6, and 11 is an alarm device. The high frequency is used for the light source because when the light source is turned on at the commercial frequency, the output of the camera 7 fluctuates at the commercial frequency, which hinders the level selection described later.

FIG. 2 shows the operation of the signal processing circuit 9. First, in step a, the scan output signal of the camera 7 using the one-dimensional image sensor is sequentially converted into a digital signal by the A / D converter 8, and this is a signal. It is read by the processing circuit 9. At this time, the paper edge position correction b is performed by the signal from the paper edge detection imaging camera 12, and then the zero level correction, that is, the shading correction is performed by the irradiation light amount distribution unevenness data stored as a function of the position from the paper edge in advance. c is performed. Further, at d, e, and f, the data for N times of scanning are stored and held, and the time integration operation is performed by taking the average value of N times for each pixel output of the image sensor. A noise amount due to is averaged over time to obtain a practical light amount profile. Third
(A) and (b) show examples of actual measurement of the light amount profile before and after time integration, respectively, and are measured with the number of scans N being 20. Although the shading correction is omitted in the same drawing, when the shading correction is applied, the reference line is as shown by the alternate long and short dash line. Further, as is clear from FIG. 6B, the glueless portion can be clearly detected by the integration processing.

By level-selecting the following light amount profile data, from the width of each level portion and its light amount level, a portion in which the pasting paper base material 1 ′, the adhesive portion 2 and the release sheet 4 are three layers, and no adhesive are present. Part 3 or sticking paper substrate 1'and release sheet 4
The presence or absence of the two-layer portion and the opening width B of one layer or the overlapping portion C of three layers in the cut portion of the release sheet 4 and their dimensions are detected, and it is checked whether the dimensions of each portion are normal. If there is an abnormality, the line is stopped at i and an alarm is issued.

FIG. 4 shows various states of the adhesive paper 1 and the light amount profile at that time, and (a) shows a case where the opening width of the cut line 5 of the release sheet 4 is normal (for example, 0.3 mm or less) , (B) is the case where the part of the score line 5 is too open, and (c) is the case where the ends of the release sheet 4 overlap each other. In addition, the score line 5 is displaced from the center of the glueless part 3 It can also be detected. In each case, the upper part is the cross-sectional view and the lower part is the light amount profile.

A method of detecting the width of the gap at the joint of the score line 5 may be a method of detecting the peak width in the light amount profile, but the wider the gap is, the higher the peak height is. Therefore, the gap width is detected by the peak height. Any method may be used.

FIG. 5 shows an embodiment corresponding to claim 2, that is, various states of the adhesive sheet 1 in the case where there is no glueless portion 3 as shown in FIG. 4 and a light amount profile at that time.
(A) shows that the opening width of the cut line 5 of the release sheet 4 is normal, (b) shows that the part of the cut line 5 is too open, and (c) shows that the ends of the release sheet 4 overlap each other. This is the case.

FIG. 6 and FIG. 7 show a method of eliminating the abnormality by receiving the above-mentioned abnormality occurrence warning. In FIG. 6, a pressing ball portion 15 is provided at the tip of the ejecting mechanism 14 driven by the stepping motor M, and the same number as the score line 5 is provided at the point B in FIG. Depending on the degree of overlap, the pressing ball 15
Press against. As a result, as shown in FIG. 6 (b),
The overlapped portions are separated into left and right parts, and the tension applied to each release sheet 4 then acts as a restoring force to restore the original position.

In the embodiment shown in FIG. 7, the straightening bar 16 having an arcuate cross section is pressed against the entire width of the release sheet 4 by the ejecting device 14. As a result, the tension as the restoring force is increased, and each release sheet 4 returns to the normal position.

FIG. 8 shows a paper edge position correcting device for correcting the paper edge position by receiving the above-mentioned paper edge detection signal. Two parallel guide rolls 17a and 17b are provided in a horizontal plane with respect to the advancing direction of the pasting paper 1. The sticking paper 1 is tilted and the sticking paper 1 is moved to a regular position by the rotation angle.

(Effects of the Invention) According to the present invention, as described above, a three-layer portion including a base material, an adhesive portion, and a release sheet of a patch sheet with a release sheet, a two-layer portion including only the base material and the adhesive portion, or a release sheet Taking advantage of the fact that the layered structure differs in stages, such as the four-layered part formed by overlapping the edges, and the amount of transmitted light differs accordingly, the dimensions of each part of the pasting paper with release sheet, which was conventionally difficult, can be calculated. It has the advantage of being easy to measure, and by integrating the output of the image sensor over time and averaging the noise due to the paper fibers over time, a highly accurate and practical S / N ratio can be obtained. There is an advantage. Further, since continuous monitoring can be automatically performed, the occurrence of defects can be immediately detected, and it is possible to prevent a situation in which a large number of defective products are produced between the occurrence of defects and the discovery.

[Brief description of drawings]

FIG. 1 (a) is a schematic system diagram showing an embodiment of the apparatus according to the present invention, FIG. 1 (b) is a longitudinal sectional view of an essential part of the same, FIG. 2 is a flow chart showing the operation of the same, and FIG. Light intensity profile diagram showing the same measurement data as above, FIG. 4 (a) (b)
(C) is an explanatory view of the same operation as above, and FIGS. 5 (a), (b) and (c).
FIG. 6 (a) is an operation explanatory diagram showing another embodiment of the present invention.
Is a schematic side view showing an embodiment of the abnormality eliminating means, (b) is an operation explanatory view thereabove, FIG. 7 (a) is a perspective view showing another embodiment of the abnormality eliminating means, and (b) is the same. A side view, FIG. 8 is a side view showing an embodiment of the paper edge position correcting device, (b) is a top view thereof, FIG. 9 shows a conventional example, (a) is a perspective view of a product, FIG. 6B is a sectional view thereof, and FIG. 6C is a schematic side view of the above manufacturing apparatus. 1 ... Adhesive paper, 1 '... Base material, 2 ... Adhesive part, 3 ... Adhesive-free part, 4 ... Release sheet, 5 ... Cut line, 6 ... Light source, 7 ... Imaging camera, 8 …… A / D converter.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Zou Tomita 4-3-1 Jōkoji, Amagasaki City, Hyogo Prefecture Kanzaki Mill Co., Ltd. Kanzaki Mill (56) Reference JP-A-53-24857 (JP, A) Sho 61-108903 (JP, A)

Claims (2)

[Claims] 1. A device for inspecting a sticky paper, comprising a release sheet coated on a glue portion on the back surface of the sticky paper, having cut lines, wherein one side of the pasted paper is continuously conveyed in the direction in which the cut lines extend. A light source is arranged on the side, a one-dimensional image sensor is arranged on the other side to detect the amount of transmitted light along a monitoring line orthogonal to the above-mentioned conveying direction of the pasting paper, and time-integrated each pixel output of the image sensor, An apparatus for inspecting a sticky paper with a release sheet, characterized in that the opening or overlapping of the cut line portion is monitored by the waveform of the time-integrated output along the monitoring line. 2. An apparatus for inspecting a sticky paper, comprising a release sheet attached to a glue portion on the back surface of the sticky paper, having cut lines, wherein one side of the pasted paper is continuously conveyed in the direction in which the cut lines extend. A light source is arranged on one side, and a one-dimensional image sensor is arranged on the other side to detect the amount of transmitted light along a monitoring line orthogonal to the above-mentioned conveyance direction of the pasting paper, and the output of the image sensor is time-integrated for each pixel. However, the waveform of the time-integrated output along the monitoring line is used to monitor the opening or overlapping of the cut line portion, and the alarm or the correction means is activated by detecting an abnormality, so that the sticking with a release sheet is possible. Paper inspection device.