JP2019109209A - Web inspection device - Google Patents

Abstract

The present invention provides a web inspection apparatus capable of knowing at a later point where a defect has occurred after a web inspection. A printer that prints QR code 2 on a traveling web W at predetermined intervals along the traveling direction, and a defect 1 of the traveling web W is detected, and a QR printed closest to the defect 1 is printed. An inspection unit 30 that acquires the code 2 and a control unit 32 that calculates position information of the defect 1 on the web W based on a positional relative relationship based on the acquired position of the QR code 2 are included. [Selection] Figure 1

Description

  The present invention relates to a web inspection apparatus.

  2. Description of the Related Art Heretofore, there has been proposed an inspection apparatus for inspecting whether there is a defect in the surface of a long web such as paper, film, or cloth.

JP, 2010-223813, A

  The inspection apparatus as described above irradiates light to the long web to detect a defect on the surface, but when the defect is found, the running web is stopped and the condition of the defect There is a problem that you have to check the

  Therefore, in view of the above-mentioned problems, the present invention has an object to provide a web inspection apparatus which can later know which position has a defect after the web inspection.

  According to the present invention, there are provided a driving device for traveling a long web at a predetermined traveling speed, a printer for printing a cord on the traveling web at predetermined intervals along the traveling direction, and defects in the traveling web. Control for calculating an inspection unit to be detected, an acquisition unit to acquire the code printed closest to the defect, and positional information of the defect in the web in a positional relative relationship based on the position of the acquired code And a web inspection apparatus.

  Further, according to an embodiment of the present invention, there is provided a drive device for traveling a long web at a predetermined traveling speed, a printer for printing a code on the traveling web, at predetermined intervals along the traveling direction, and the web A thickness measurement unit that measures the thickness of the surface, an acquisition unit that acquires the code printed closest to the position at which the thickness is measured, and a position relative to the position of the thickness based on the position of the acquired code And a control unit that calculates based on the relationship.

  According to the inspection apparatus of the present invention, when the web has a defect or the thickness is inspected, it can be known later at which position the defect or which position the thickness is.

FIG. 7 is an explanatory view of an embodiment of the present invention, and is a side view showing a state in which the printer and the inspection unit are disposed when the web W is traveling from the unwinding axis to the winding axis. When the web W is traveling from the unwinding shaft to the winding shaft, it is a plane explanatory view in a state where the printer and the inspection unit are arranged. It is a figure which stuck the web W on a board and projected the test | inspection mark by the projector. It is a block diagram of an inspection device.

  An inspection apparatus 10 according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

(1) Inspection device 10
The inspection apparatus 10 will be described with reference to FIGS. 1 to 4. As shown in the block diagram of FIG. 4, the control unit 32 of the inspection apparatus 10 rotates the winding shaft 26 of the web W of FIG. 1 to rotate the web W at a predetermined traveling speed. A pair of left and right printers 28L and 28R, an inspection unit 30, a reader 34, a projector 36, and a storage unit 42 are connected.

  As shown in FIGS. 1 and 2, in the pair of left and right printers 28L and 28R and the inspection unit 30, the long web W wound around the unwinding shaft 12 passes through the guide rollers 14 to 24 and takes up the winding shaft It is placed on the road until it is rolled up. Here, as shown in FIG. 2, the coordinate system in this embodiment is an orthogonal coordinate system in which the traveling direction of the web W is the x axis and the width direction of the web W is the y axis direction.

  The pair of left and right printers 28L and 28R prints a pair of left and right QR codes (registered trademark, hereinafter the same) 2 at intervals of 1 m along the traveling direction on the pair of left and right ears of the web W. The printers 28L and 28R are ink jet printers or laser printers. The QR code 2 identifies the identification information of the QR code 2 itself, the type of the web W (model number, manufacturer, etc.), and distinguishes whether the surface on which the QR code 2 is printed is the front or back. The information includes left and right information that distinguishes whether it is the left or right side of the pair of left and right ears of the web W, and the distance from the start point QR code 2. The “starting point QR code 2” means the QR code 2 initially provided on the web W when the web W is unwound from the unwinding shaft 12, and all the QR codes 2 are from the starting point QR code 2 Contains information representing the distance of (hereinafter referred to as "the distance from the starting point"). In addition, only the starting point QR code 2 includes information to the effect that it is the starting point in the QR code 2. The distance from the starting point is obtained by integrating the traveling speed of the web W and the traveling time until the QR code 2 is printed from the starting point QR code 2.

  The inspection unit 30 reads the pair of left and right QR codes 2 printed on the pair of left and right ears, and inspects the web W for defects 1 such as defects, streaks, scratches, pinholes and unevenness. The inspection unit 30 includes a light emitting unit, a light receiving unit, and a signal processing unit.

  The light projection unit is a light source such as a fluorescent lamp or an LED or a light source of laser light.

  The light receiving unit is a CCD line sensor, and simultaneously receives all the light in the width direction (y-axis direction) of the web W.

  The signal processing unit forms a one-dimensional image in the y-axis direction from light entering the light receiver, binarizes the one-dimensional image, and sequentially binarizes the one-dimensional image in the y-axis direction in the x-axis direction A two-dimensional image is formed by scanning in accordance with the traveling speed. And the presence or absence of the defect 1 is determined from this two-dimensional image. As a determination method, there are the following regular reflection method, a scattering method, and a transmission method.

  In the “regular reflection method”, when the surface of the web W is normal, the light output from the light projecting unit is reflected by the object and detected by the light receiving unit. On the other hand, if there is a defect 1 on the surface, the light is scattered by the defect 1 and the light detected by the light receiving unit becomes weak, so that the defect 1 is detected.

  In the “diffuse reflection method”, when the surface of the web W is normal, the light output from the light projecting unit is reflected by the surface but no light is incident on the light projecting unit. On the other hand, when there is a defect 1 on the surface, the light is irregularly reflected and the light is incident on the light receiving part to detect the defect 1.

  In the “transmission method”, when the surface of the web W is normal, the light output from the light projecting part can be transmitted through the web W and detected by the light receiving part. On the other hand, when there is a defect 1 on the surface, the light is scattered by the defect 1 and the light detected by the light receiving unit becomes weak, thereby detecting the defect 1.

  The control unit 32 includes information on the defect 1 found by the inspection unit 30 (for example, the defect 1 is a defect, a scratch, a muscle, etc.), identification information of the QR code 2 closest to the information, the QR code 2 and the defect 1 The storage unit 42 stores position information indicating the position relative relationship with the above. As shown in FIG. 2, position information is position information (dx, dy) of defect 1 when the QR code 2 closest to the defect 1 is the origin, the traveling direction is the x axis, and the width direction is the y axis. Means).

  The reader 34 and the projector 36 are used when the operator confirms the information on the defect 1 of the web W whose inspection has been completed as shown in FIG. When the worker confirms the defect 1 of the web W, a part of the long web W is cut and attached to the board 38. In this case, the web W to be attached to the board 38 is cut so as to include four left and right QR codes 2 and four left and right QR codes 2 provided next to it. Then, the operator reads all the four QR codes 2 printed on the web W attached by the reader 34. Then, the control unit 32 causes the projector 36 to project the inspection mark 3 on the position of the defect 1 corresponding to each QR code 2. Then, since the inspection mark 3 is projected on the portion of the defect 1 of the web W stuck on the board 38, the operator can immediately confirm the defect 1. That is, when the four QR codes 2 are read, the control unit 32 calls from the storage unit 42 the identification information corresponding to the read QR codes 2, the position information of the defect 1, and the distance from the start point. Since the position information of the defect 1 is obtained from the relative position of the QR code 2 closest to the defect 1, the inspection mark 3 is placed on the position information (dx, dy) from the origin with the QR code 2 as the origin. Project The inspection mark 3 is, for example, a circle mark surrounding the defect 1. Then, since all the four QR codes 2 are read, the inspection mark 3 can be projected on all the defects 1 in the area surrounded by the four QR codes 2.

(2) Operation State of Inspection Device 10 Next, the operation state of the inspection device 10 will be described.

  The web W is unwound from the unwinding shaft 12 and wound around the winding shaft 26 through the guide rollers 14-24. In this case, the winding shaft 26 is rotated by the motor 40 at a predetermined rotational speed, and the web W travels at a predetermined traveling speed.

  The pair of left and right printers 28L and 28R are provided between the guide roller 14 and the guide roller 16, and print the QR code 2 on the pair of left and right ears on the surface of the web W, respectively. At the position of the web W first unwound from the unwinding shaft 12, the QR code 2 includes information indicating that it is the starting point QR code 2. Thereafter, the pair of left and right QR codes 2 are printed at predetermined intervals (for example, 1 m intervals), and in this case, the distance from the starting point is included in each QR code 2.

  Next, when the web W passes between the guide roller 16 and the guide roller 18, the inspection unit 30 inspects the surface of the web W. For example, when there is a defect 1 (defect) at the upper left in FIG. 2, positions (dx, dy) in the x-axis direction and y-axis direction with the upper left QR code 2 as the origin are stored in the storage unit 42.

  Next, the control unit 32 continues the printing of the QR code 2 and the inspection operation of the defect 1 until the winding shaft 26 winds up the web W.

  Next, the case of determining what kind of defect 1 is present using the inspection apparatus 10 will be described with reference to FIG.

  First, a part of the long web W is cut and attached to the board 38. In this case, the web W to be attached to the board 38 is cut and attached so as to include four of one pair of left and right QR codes 2 and the next pair of left and right QR codes 2.

  Next, the operator uses the reader 34 to read all four QR codes 2 printed on the pasted web W, and the control unit 32 detects the defect 1 in the area surrounded by the four QR codes 2. At the position, the inspection mark 3 is superimposed and projected by the projector 36. As a result, the operator can immediately confirm the defect 1.

(3) Effects According to the present embodiment, since the positional relationship between the defect 1 in the web W and the closest QR code 2 is linked and stored, a part of the web W is cut and attached to the board 38 Even in this case, all the four QR codes 2 printed on the pasted web W are read, and the inspection mark 3 is projected on all the defects 1 in the area surrounded by the four QR codes 2 Therefore, the operator can confirm at a glance at which position the defect 1 is present.

  Further, since the QR code 2 includes information on the type of the web W, the distinction between the front and the back, and the distinction between right and left, the operator can immediately confirm the information by reading the QR code 2.

  When the type information and position information of the defect 1 in the web W are used, when processing the web W, the position where the defect 1 is present may be avoided or processed as unnecessary or removed.

(4) Modifications In the above embodiment, the inspection unit 30 is provided to inspect the defect 1 in the web W. Instead, a thickness measurement unit is provided to inspect the thickness of the web W during traveling, and the measured thickness And the nearest QR code 2 may be linked and stored, and the distribution of thickness corresponding to the distance from the origin may be determined. However, at this time, the relationship between the thickness and the distance from the starting point is sufficient, and position information of the position relative relationship from the QR code 2 is unnecessary.

  Moreover, in the said embodiment, although the apparatus which test | inspects and the apparatus which reads QR Code 2 were integral, you may be separate bodies.

  In the above embodiment, the web W is simply unwound from the unwinding shaft 12 and wound by the winding shaft 26. This is merely an example, and in addition to this, for example, the printers 28L and 28R and the inspection unit A coating device for coating the coating liquid on the web W, or a heating device for heating the web W is provided between 30 and 30, and there is a defect 1 on the surface after the web W is coated or heated. The inspection unit 30 may be configured to inspect whether or not this is the case.

  In the above embodiment, although the QR code 2 is used as the code to be printed on the web W, the present invention is not limited to this, and bar codes, other symbols, numbers, alphabets, or characters such as Japanese may be printed. .

  In the above embodiment, the QR code 2 is printed on the pair of left and right ears, but the QR code 2 may be printed on only one of them.

  Further, in the above embodiment, when the position information of the defect 1 is represented, the closest QR code 2 is the origin, but instead, the origin QR code 2 may be the origin.

  When the defect 1 is found on the surface of the web W by the inspection unit 30, a printer may be provided in the inspection unit 30, and the inspection mark 3 may be directly printed on the web W at the position of the defect 1.

  Further, in the above embodiment, the inspection mark 3 is a circle mark, but it may be a square mark or a triangle mark other than this, and the portion of the inspection mark 3 has a color different from other portions ( For example, it may be projected in red.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

DESCRIPTION OF SYMBOLS 10 ... Inspection device, 12 ... unwinding shaft, 14-24 ... Guide roller, 26 ... Winding shaft, 28L, 28R ... Printer, 30 ... Inspection part, 32 .. Control unit 34 34 Reader 36 Projector 40 Motor

Claims (11)

A driving device for causing the long web to travel at a predetermined traveling speed;
A printer for printing a code on the traveling web at predetermined intervals along the traveling direction;
An inspection unit that detects a defect in the traveling web;
An acquisition unit for acquiring the code printed closest to the defect;
A control unit that calculates positional information of the defect on the web in a positional relative relationship based on the acquired position of the code;
Web inspection apparatus having a. The control unit calculates the position information of the defect in correspondence with the position in the Cartesian coordinate system with the position of the acquired code as the origin, the traveling direction as the x axis, and the width direction of the web as the y axis direction. ,
The inspection apparatus of the web of Claim 1. It further comprises a projector and a reader for reading the code,
The control unit
The position of the defect is calculated from the code read by the reader,
Projecting an inspection mark onto the position of the defect on the web containing the code using the projector;
The inspection apparatus of the web of Claim 1. A driving device for causing the long web to travel at a predetermined traveling speed;
A printer for printing a code on the traveling web at predetermined intervals along the traveling direction;
A thickness measurement unit that measures the thickness of the web;
An acquisition unit for acquiring the code printed closest to the position whose thickness is measured;
A control unit that calculates the position of the thickness in a positional relative relationship based on the acquired position of the code;
Web inspection apparatus having a. The printer prints the code on a pair of left and right ears of the web.
The inspection apparatus of the web of Claim 1 or 4. The printer prints on the web a starting point code which is a starting point of the code printed at the predetermined intervals along the traveling direction.
The inspection apparatus of the web of Claim 1 or 4. The control unit calculates a distance from the start code with respect to the acquired code.
The inspection apparatus of the web of Claim 6. The code also includes information on the type of the web, the distinction between the front and back of the side on which the code is printed, or the distinction between left and right of the position on which the code is printed.
The inspection apparatus of the web of Claim 1 or 4. The code is a QR code, a barcode, numbers, or characters,
The inspection apparatus of the web of Claim 1 or 4. The inspection unit and the acquisition unit are integrated;
The inspection apparatus of the web of Claim 1 or 4. Between the printer and the inspection unit, a coating device for applying a coating liquid to the web, or a heating device for heating the web is provided.
The inspection apparatus of the web of Claim 1 or 4.

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