JPH11208999A - Cob-webbing inspecting method for package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a cob-webbing detecting method for a package and further improve a cob-webbing inspecting system by detecting reflected light from an end face of the stationary or revolving package and removing bunch yarn from the number of cob-webbing yarn at the time of an end face inspection of the package. SOLUTION: Reflected light generated because light ray from a light source d1 reflects on bunch yarn y1 and cob-webbing yarn y2 existing on an end face p1 of a package P is received, an inspection signal generated from a line sensor d2 is processed in a signal processing circuit c1 and the signal becomes plane positional information in a binarization circuit c2. The length of a parabolic curve recognized via this binalization circuit c2 is calculated in a calculation circuit c3. By measuring the length of the parabolic curve corresponding to bunch yarn y1 and cob-webbing yarn y2, the lengths of bunch yarn y1 and cob-webbing yarn y2 can be measured. Exactness is increased by a constitution that yarn is judged to be not cob-webbing yarn y2 when yarn is longer than bunch yarn y1 and the yarn is not inputted as cob-webbing yarn y2 in a counting circuit c6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a streak which appears on an end face of a package.

[0002]

2. Description of the Related Art The present applicant has filed an earlier application (Japanese Utility Model Application 7-50).
371, JP-A-7-128256, etc.), a light source for irradiating an end face of a package being rotated, a line sensor for reading light reflected from the end face of the package, a twill drop read from the line sensor, and the like. Is converted into a parabolic curve by binarizing the information, and the ratio between the height and the width of the parabolic curve is calculated. Check whether the quality of the package, such as the ribbon on the end face of the package other than the ribbon (the overlapping of the yarns at the folded part of the traverse is an arc-shaped portion that does not affect the quality of the package), etc. We have proposed a method for detecting a tear drop in a package.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the above-described method of detecting a twill drop of a package so that a bunch winding yarn present at an end face of a package is not inspected as a twill drop yarn. It is still another object of the present invention to provide a method for inspecting a package for a break in which the accuracy of the check for the break is improved.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention firstly inspects an end face of a package by detecting reflected light from the end face of a stationary or rotating package. In doing so, bunch yarns are excluded from the number of twill-dropping yarns. Second, yarns having a length equal to or greater than the length of the bunch yarns are excluded from the number of twill-dropping yarns. Third, the thickness of the yarn layer of the package is calculated from the measured package diameter and the known bobbin diameter, and the thickness of the obtained yarn layer is estimated as the length of the bunch yarn. Then, the number of twill drops having a length equal to or greater than the length is excluded from the detected number of twill drops.

[0005]

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments unless it exceeds the gist of the present invention.

First, an overall configuration of an example of an inspection apparatus to which a method for inspecting package shedding is applied will be described with reference to FIG.

Reference numeral 1 denotes a dark room, in which a plurality of inspection stations S2 to S5 are provided. In front of the inspection stations S2 to S5, a standby station S
1 and inspection stations S2 to S
Immediately after 5, a payout station S6 is provided. The package P to be inspected is placed on a tray T, and is configured to be transported by a transport device (not shown).

Reference numeral 2 denotes a tray rotating device disposed at a predetermined inspection station. The tray rotating device 2 includes a substantially conical rotating body 3 that contacts the lower surface of the tray T, and a rotating shaft of the rotating body 3. A pulley 4 attached to the motor 5, a motor 5,
A pulley 6 attached to the output shaft of the motor 5; and a drive belt 7 for transmitting the rotation of the pulley 6 to the pulleys 4 attached to the rotating shafts of the rotating members 3. By rotating the rotating member 5, the rotating member 3 is rotated via the pulley 6, the driving belt 7, and the pulley 4,
The tray T in contact with the rotating body 3 can be rotated by rotating the rotating body 3.

Reference numeral 8 denotes a bobbin pressing device for pressing the upper end of the bobbin B of the package P placed on the tray T rotated by the tray rotating device 2. The bobbin pressing device 8 is a suitable driving device such as a cylinder. , A support rod 9 that can move up and down and a holding member 11 that is rotatably supported by a shaft 10 attached to the support rod 9, and is rotated by the tray rotation device 2. By pressing the upper end of the bobbin B of the package P placed on the tray T with the pressing member 11, the rotating package P is prevented from wobbling.

Next, with reference to FIG. 2, a description will be given of a package tear inspection means provided in any one of the inspection stations S3 to S5 described above.

On the end face p1 of the package P, there are a bunch thread y1 and a twill drop thread y2 extending from the outer peripheral face p2 of the package P in the tangential direction of the outer peripheral face of the bobbin B. In general, the package P has a bunch yarn at the start of winding and a bunch yarn at the end of winding, and the bunch yarn y1 referred to here is
Both of them are included. However, especially in the case of the bunch yarn at the end of winding, since the yarn always runs from the outermost layer of the package P to the bobbin, when inspecting the end face where the bunch yarn at the end of winding is present, the present invention provides: Of particular importance.

D1 is a light source such as a halogen lamp disposed on the side of the package P, and d2 is a line sensor disposed on the side of the package P which is substantially perpendicular to the light source d1 in a plane angle. Yes, the line sensor d2 is d3
In order to be able to inspect a long and narrow inspection area in the radial direction, the CCD camera has pixels arranged in a row in the longitudinal direction of the inspection area d3. The line sensor d2 is configured to inspect the brightness along the inspection part d3 on the end face p1 of the package P placed and rotated on the tray T, and to output an inspection signal.

A light beam from the light source d1 is reflected by a bunch yarn y1 or a traversing yarn y2 present on the end face p1 of the package P, and receives a reflected light. The inspection signal emitted from the line sensor d2 is processed by signal processing. Processed by the circuit c1,
The position information becomes two-dimensional in the binarization circuit c2. The length of the parabolic curve recognized through the binarization circuit c2 is calculated by the calculation circuit c3. As described above, by measuring the length of the parabolic curve corresponding to the bunch yarn y1 and the twill falling yarn y2, the length of the bunch yarn y1 and the twill falling yarn y2 are measured.

D4 is a laser sensor for measuring the distance to the surface of the package, and c4 is an arithmetic unit for calculating the thickness of the yarn layer of the package P from a signal from the laser sensor d4. Converter or CP
U and the like. Generally, the bobbin diameters of the packages P flowing on the same inspection line are the same, and the package diameter and the thickness of the yarn layer are immediately calculated from the distance measured by the laser sensor d4. If the bobbin diameter is different for each type, the corresponding bobbin diameter is input as type data in advance to the arithmetic unit c4, and is derived by judging the distance data from the laser sensor d4 and the type of the package P. It is also possible to calculate the thickness of the yarn layer from the bobbin diameter data obtained. In this embodiment, the thickness of the yarn layer of the package P calculated in this way is estimated to be the length of the bunch yarn y1.

Reference numeral c5 denotes a comparison circuit, which is estimated to be the length of the bunch yarn y1 and the thickness of the yarn layer of the package P calculated by the calculation device c4, and as described above, the bunch yarn y
Inspection signals emitted from the line sensor d2 are processed by the signal processing circuit c1 and the binarization circuit c2 in response to the reflected light generated by being reflected by 1 and the traversing yarn y2, and are calculated by the calculation circuit c3. The length of the bunch yarn y1 and the length of the twilled yarn y2 are compared. Then, the length of the yarn present on the end face p1 of the package P measured based on the inspection signal of the line sensor d2 is calculated from the thickness of the yarn layer of the package P calculated based on the signal from the laser sensor d4. When the length is longer than the estimated bunch yarn y1, it is determined that the yarn is not the twilled yarn y2, and is configured not to be input to the counting circuit c6 as the twilled yarn y2.

As described above, since the number of bunch windings is excluded from the number of shedding, it is possible to accurately count the number of shedding, and that there is a difference in the result of the shedding inspection depending on the presence or absence of bunch winding. Is gone.

[0017] It should be noted that the present applicant 7-5037 according to the present applicant.
As described in Japanese Unexamined Patent Publication No. 3-58568, the ratio between the height and width of a parabolic curve recognized through a binarization circuit c2 is calculated by a calculation circuit c3. The ratio between the height and the width of the object curve is compared with the predetermined position input to the predetermined position setting circuit c7, and the ratio between the height and the width of the parabolic curve is determined as the height of the parabolic curve of the twilled yarn y2. Ribbon y smaller than the ratio of width to width
3 is configured to be excluded from the number of times of traversing.

[0018]

Since the present invention has the above-described structure, the following effects can be obtained.

It is possible to prevent erroneous determination of a bunch winding that does not have a bleeding pattern as a bleeding pattern.

There is no longer any difference in the inspection of the wrapping of the package depending on the presence or absence of the bunch winding.

Since the thickness of the yarn layer of the package is measured without measuring the actual length of the bunch yarn, the thickness of the yarn layer is estimated to be the length of the bunch yarn. Since the drop can be measured quickly and easily, it is possible to speed up the package drop inspection and reduce the cost.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an entire package inspection apparatus as an example to which a package tear inspection method of the present invention is applied.

FIG. 2 is an inspection block diagram of a method of inspecting a package according to the present invention;

[Explanation of symbols]

 P ······ Package y1 ······ Bunch yarn y2 ······ Aya falling yarn 2 ····· Tray rotating device 8 ··· ······ Bob bobbin holding device d1 ····· Light source d2 ······ Line sensor d4 ······ Laser sensor

Claims (3)

[Claims] 1. A package according to claim 1, wherein the bunch yarn is excluded from the number of the twill-dropping yarns when inspecting the end surface of the package by detecting the reflected light from the end surface of the package that is stationary or rotating. Tear drop inspection method. 2. A yarn having a length equal to or greater than the length of a bunch yarn,
2. The method according to claim 1, wherein the yarn is excluded from the number of the twilled yarns.
Inspection method of the package. 3. The thickness of the yarn layer of the package is calculated from the measured package diameter and the known bobbin diameter, and the thickness of the obtained yarn layer is estimated as the length of the bunch yarn. 3. The method according to claim 2, wherein the number of cross-cuts having the above length is excluded from the detected number of cross-cuts.