JP2007114139A - Apparatus for marking defect - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for marking a defect, which detects a defect in a long sheet product conveyed in a longitudinal direction by an inspection apparatus and stably and accurately places a mark at a part where the defect exists even if many defects exist locally and collectively. <P>SOLUTION: The apparatus for marking the defect detects a defect in the long sheet product conveyed in the longitudinal direction with the inspection apparatus and places a mark in the detected defect part at a position downstream of the conveying direction with the inspection apparatus. A marking head where a plurality of marking members are arranged is disposed in the width direction of the long sheet product is prepared, and the sheet product is divided into rectangles where the length of one side of the width direction is equal to the interval of the marking member and the length of one side of the longitudinal direction is constant. When a defect is detected in one rectangle, one mark with the same length as the length of one side in the longitudinal direction is placed in the longitudinal direction in the rectangle. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a defect marking apparatus. More specifically, the present invention detects defects in a long sheet-shaped product conveyed in the length direction by an inspection device, and even if many defects are concentrated locally, The present invention relates to a defect marking apparatus capable of marking stably and accurately.

In the manufacturing process of long sheet-like products such as synthetic resin films and sheets, defects are automatically detected by the inspection device in the process of transporting the sheet-like product and detected on the downstream side in the transport direction. The marking is applied to the defective portion, and the defective portion is removed or repaired by using the marking as an index in a subsequent process. Defect detection and marking is performed by processing an image obtained by an imaging means such as a CCD to recognize the defect, and depending on the conveyance speed of the sheet-like product and the size of the defect, it is further downstream in the conveyance direction than the inspection device. This is done by operating a certain marking device and marking the defective part parallel to the longitudinal direction of the sheet-like product. With the advancement of imaging means and computers, it has become easy to accurately determine the marking position. However, since marking on sheet-like products has to rely on physical means, there are still many problems and various Marking means are being tried.
For example, as a defect marking device for a sheet-like product that can directly mark a defect part of a sheet-like product and can mark the defect part efficiently and reliably without causing a decrease in yield, By detecting the light with the detection means, the light intensity is detected corresponding to the position in the width direction of the sheet-like product, and this light intensity is compared with the reference value by the defect determination means to determine whether or not it is a defect. If the defect is determined to be a defect, the position information in the width direction of the sheet-like product of the defect is stored in the defect position storage means, the position information in the width direction of the defect is given to the marking position control means, and the marking position is Control the detection time information when detected by the detection means and the sheet product conveyance speed detected by the sheet conveyance speed detection means. As an example of a mechanism for moving the pen of the marking device in the width direction, an apparatus for controlling the timing of marking by the marking means by giving to the king position control means has been proposed. A mechanism for positioning a pen by moving a base in the width direction by rotating a bar by fitting a base on which a pen on which a matching inner screw is formed is fitted (Patent Document 1). However, if a large number of defects occur, it is necessary to distribute a large amount of position information from the defect position storage means to the marking means, and in reality, information from the detection means to the marking means must be limited. In that case, an unmarked area where marking cannot be performed occurs, leading to outflow of defects.
In addition, when a sheet-shaped product is cut and a section having a certain shape is cut out to obtain a product, it is ensured that the section does not contain defects, and a decrease in yield is suppressed. As a defect marking apparatus for a sheet-like product that can be used, a defect marking apparatus that performs markings before and after the detected defective portion in the length direction of the sheet-like product is used. However, if a large number of defects are concentrated locally on the sheet-like product, the amount of information sent from the image processing device may exceed the processing capability of the computer and the marking head, and marking corresponding to individual defects may be applied. Sometimes it was impossible.
JP-A-9-304295

  The present invention detects defects in a long sheet-like product conveyed in the length direction by an inspection apparatus, and even if a large number of defects are concentrated locally, they are stably and accurately detected at the location where the defect exists. The present invention has been made for the purpose of providing a defect marking apparatus capable of marking a mark.

As a result of intensive research to solve the above problems, the inventor has obtained a long sheet-like product conveyed in the length direction, the length of one side in the width direction is equal to the interval of the marking members, and the length When a defect is detected in one rectangle, the length of one side in the longitudinal direction is the same as the length of one side in the longitudinal direction, regardless of the number of defects. We found that by applying one marking of the same length as that, even if many defects are concentrated locally, it is possible to stably and accurately mark the existence of defects, The present invention has been completed based on this finding.
That is, the present invention
(1) In an apparatus for detecting a defect in a long sheet-like product conveyed in the length direction by an inspection apparatus and marking a defect portion detected on the downstream side in the conveyance direction from the inspection apparatus, A marking head in which a plurality of marking members are arranged in the width direction of the sheet-like product is provided, and the length of one side of the sheet-like product in the width direction is equal to the interval of the marking members, and the length of one side in the longitudinal direction is a constant value. When a defect is detected in one rectangle, one marking having the same length as one side in the longitudinal direction is applied in the longitudinal direction in the rectangle. apparatus,
(2) The defect marking device according to (1), wherein the length of one side in the longitudinal direction of the rectangle of the sheet-like product is 0.1 to 10 times the length of one side in the width direction.
(3) The defect marking device according to (1), wherein the marking member is located at the center of one side in the width direction of each rectangle, and
(4) The defect marking device according to (1), wherein the marking member is pushed out by a solenoid to perform marking.
Is to provide.

  According to the defect marking device of the present invention, a long sheet-like product is divided into a number of rectangles, and whether or not a defect exists in one rectangle is determined for each rectangle regardless of the number of defects. Even when a large number of defects are concentrated locally, or even when there are large defects continuously straddling a large number of rectangles, the defect location is stable and accurate. Marking can be applied.

The defect marking device of the present invention is a device for detecting a defect of a long sheet-like product conveyed in the length direction by an inspection device and marking the defect portion detected downstream of the inspection device in the conveyance direction. A marking head in which a plurality of marking members are arranged in the width direction of the long sheet-like product, the length of one side of the sheet-like product in the width direction is equal to the interval of the marking members, and the length of one side in the longitudinal direction. Defect marking that is divided into rectangles having a constant value, and when a defect is detected in one rectangle, a single marking having the same length as one side in the longitudinal direction is provided in the longitudinal direction of the rectangle. Device.
FIG. 1 is an explanatory view of one aspect of the defect marking apparatus of the present invention. The sheet-like product 1 is conveyed in the direction of the arrow. The sheet-like product is imaged by the CCD camera 2 and image processing is performed by the inspection device 3. When a defect is detected in the sheet-like product, a signal is sent from the inspection device 3 to the computer 4, the computer determines whether or not there is a defect for each rectangle, regardless of the number of defects, and the solenoid 5 operates to mark the marking member. 6 is extruded, and one marking having the same length as one side of the longitudinal direction of the rectangle is provided in the rectangle in which the defect of the sheet-like product conveyed on the support roll 7 exists.

FIG. 2 is a side view and a top view showing an arrangement of marking members according to another embodiment of the device of the present invention. In this embodiment, marking members 6 driven by a large number of solenoids are arranged at equal intervals over the entire width of the sheet-like product. When a defect is detected in the inspection device, a signal is sent from the inspection device to the computer, the presence or absence of a defect is judged for each rectangle, and the marking member is pushed out by the solenoid into the rectangle where the defect of the sheet-like product exists, and the rectangle One marking having the same length as one side in the longitudinal direction is applied.
In the apparatus of the present invention, the length of one side in the longitudinal direction of the rectangle of the sheet-like product is preferably 0.1 to 10 times the length of one side in the width direction, and is 0.5 to 2 times. More preferably, the length of one side in the longitudinal direction is equal to the length of one side in the width direction, and the rectangle is more preferably a square. If the length of one side in the longitudinal direction of the rectangle is less than 0.1 times the length of one side in the width direction, it may not be easy to visually recognize the marking. If the length of one side in the longitudinal direction of the rectangle exceeds 10 times the length of one side in the width direction, the amount of the sheet-like product to be removed increases due to the presence of defects, which may impair the economy. .

  FIG. 3 is an explanatory view of another aspect of the defect marking apparatus of the present invention. A marking head 8 in which a plurality of marking members 6 are arranged is provided facing the long sheet-like product 1 conveyed in the direction of the arrow. In the present embodiment, the sheet-like product has the length of one side in the width direction equal to the interval “a” of the marking member, and the length of one side in the longitudinal direction is the length a of one side in the width direction, except for the side edges 9. Is divided into rectangles or squares equal to. In the case where both side edges of the sheet-like product are separated and collected and are not finalized, the inspection of the defects on both side edges can be omitted. When a defect is detected in the sheet-like product, a signal is sent from the image processing apparatus to the computer, and when the rectangle in which the defect 10 exists passes through the marking head, the marking member A is pushed out, and the longitudinal direction in the rectangle In addition, one marking 11 having the same length as one side in the longitudinal direction is applied.

In the defect marking apparatus of this invention, it is preferable that a marking member is located in the center of one side of the width direction of each rectangle. FIG. 4 is an explanatory diagram of an example showing the relationship between defects and markings in one rectangle. In the figure, four sides of the rectangle are indicated by dotted lines. When a defect 10 is detected in one rectangle 12, one marking 11 having the same length as one side in the longitudinal direction is applied in the longitudinal direction within the rectangle. By positioning the marking member at the center of one side in the width direction of the rectangle, the marking is applied at the center in the width direction of the rectangle. That is, if the length of one side in the width direction of the rectangle is a, the two sides in the length direction of the rectangle exist on both sides separated from the marking by a / 2. Therefore, even when it is not easy to visually check the defect, the range in which the defect is to be searched is clear, and even if the defect cannot be visually recognized, the part to be removed of the sheet-like product can be specified.
FIG. 5 is an explanatory diagram of another example showing the relationship between defects and markings in one rectangle. In the figure, four sides of the rectangle are indicated by dotted lines. When a large number of defects are detected in one rectangle 12, a signal is sent from the image processing apparatus to the computer, and the computer determines the presence or absence of the defect 10 in one rectangle, and there are many defects in the rectangle. Even in this case, since only one marking 11 having the same length as one side in the longitudinal direction is applied in the longitudinal direction in the rectangle regardless of the number of defects, a large number of defects are concentrated locally. Even if it exists, the processing capability of the computer and the marking member will not be insufficient.

FIG. 6 is an explanatory diagram of another example showing the relationship between a defect and a marking of a long sheet-shaped product. In the figure, four sides of the rectangle are indicated by dotted lines. In this figure, a long defect 10 exists in the width direction of a long sheet-shaped product, and the marking 11 has the same length as the length of one side in the longitudinal direction in the longitudinal direction in three rectangles continuous in the width direction. Each one is given.
FIG. 7 is an explanatory diagram of another example showing the relationship between a defect and marking of a long sheet-like product. In the figure, four sides of the rectangle are indicated by dotted lines. In this figure, a long defect 10 exists in the longitudinal direction of a long sheet-shaped product, and the marking has the same length as the length of one side in the longitudinal direction in the longitudinal direction of five rectangles continuous in the longitudinal direction. 11 is given one by one. In a defect marking device that grasps the entire defect as one image and marks the defective part, there is a long defect in the longitudinal direction.For example, a defect with a length exceeding the distance from the inspection device to the marking head is marked. Although it cannot be applied, since the defect marking device of the present invention determines the presence or absence of a defect for each rectangle, even if a long defect exists in the longitudinal direction of a long sheet-like product, the defect is detected for each continuous rectangle. It is possible to make a marking from the start point to the end point of the long defect in the longitudinal direction of the long sheet-like product.
In the defect marking device of the present invention, the marking having the same length as the length of one side in the longitudinal direction applied in the longitudinal direction in the rectangle can be extended back and forth. FIG. 8 is an explanatory diagram of another example showing the relationship between defects and markings in one rectangle. In the figure, four sides of the rectangle are indicated by dotted lines. When a defect 10 is detected in one rectangle 12, one marking 11 is applied in the longitudinal direction within the rectangle so as to extend back and forth beyond two sides in the width direction of the rectangle. By extending the marking back and forth beyond the two sides in the width direction of the rectangle, even if there is a slight shift in the marking position, a marking with the same length as the length of one side in the longitudinal direction is placed in the longitudinal direction within the rectangle. Can be applied reliably.

In the defect marking device of the present invention, the mechanism for pushing out the marking member is not particularly limited, but the marking member is preferably pushed out by a solenoid, more preferably pushed out by a push-type solenoid. Push-type solenoids have a response time of several tens of milliseconds and can push out marking members in a short time. It is possible to accurately and clearly mark the necessary portions of.
Examples of the marking member used in the present invention include an oil-based marking pen, a pressurized ballpoint pen that fills compressed air and pushes out ink, and an oil-based colored pencil. Among these, an oil-based marking pen filled with quick-drying ink can be preferably used. By using a quick-drying ink, marking can be performed on a short production line without a drying process. When using a fast-drying ink, it is preferable to provide a marking pen storage tube shutter that seals the pen tip to prevent the pen tip from drying.

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
Example 1
A contaminated film produced by partially spraying kaolin on a biaxially stretched polyethylene terephthalate film having a width of 1,600 mm, a thickness of 50 μm, and a length of 200 m was examined. Eight CCD cameras were attached at intervals of 200 mm above the polyethylene terephthalate film, and a light source was installed below the polyethylene terephthalate film at a position corresponding to the CCD camera. Above the polyethylene terephthalate film 2.0m downstream from the CCD camera and the light source, a marking head having 72 oil marking pens operated by a push-type solenoid within a width of 1,600mm at intervals of 22mm, and a polyethylene terephthalate film A support roll was provided below at a position facing the marking head.
Connect the image processing device [Nagase Sangyo Co., Ltd., Scantec] to the CCD camera and send the defect signal detected in the image processing device to a general-purpose personal computer. The presence or absence of a defect was judged for each square divided into a side of 22 mm and a side of 22 mm in the longitudinal direction, and marking was set so as to mark a length of 22 mm in the longitudinal direction in the center of the width direction of the square where the defect exists.
The polyethylene terephthalate-contaminated film was conveyed at a speed of 20 m / min, and defects were detected and marked. 137 defects were detected on the 200 m contaminated film, and the marking pen operated normally and was marked.

  According to the defect marking apparatus of the present invention, a long sheet-like product is divided into a large number of rectangles, and whether or not defects exist in one rectangle is determined for each rectangle regardless of the number of defects. Even when a large number of defects are concentrated locally, or even when there are large defects continuously straddling a large number of rectangles, the defect location is stable and accurate. Marking can be performed to take measures such as removing or repairing defective parts of the sheet-like product.

It is explanatory drawing of the one aspect | mode of the defect marking apparatus of this invention. It is the side view and top view which show the arrangement | sequence of the marking member of the other aspect of this invention apparatus. It is explanatory drawing of the other aspect of the defect marking apparatus of this invention. It is explanatory drawing of an example which shows the relationship between a defect and marking. It is explanatory drawing of the other example which shows the relationship between a defect and marking. It is explanatory drawing of the other example which shows the relationship between a defect and marking. It is explanatory drawing of the other example which shows the relationship between a defect and marking. It is explanatory drawing of the other example which shows the relationship between a defect and marking.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet-like product 2 CCD camera 3 Inspection apparatus 4 Computer 5 Solenoid 6 Marking member 7 Support roll 8 Marking head 9 Both-sides edge 10 Defect 11 Marking 12 Rectangular

Claims (4)

  In an apparatus for detecting a defect in a long sheet-shaped product conveyed in the length direction by an inspection apparatus and marking a defect portion detected downstream of the inspection apparatus in the conveyance direction, the long sheet-shaped product A marking head in which a plurality of marking members are arranged in the width direction is provided, and the sheet-like product is a rectangle in which the length of one side in the width direction is equal to the interval of the marking members and the length of one side in the longitudinal direction is a constant value. When a defect is detected in one rectangle, a marking having the same length as one side in the longitudinal direction is provided in the longitudinal direction in the rectangle.   The defect marking device according to claim 1, wherein the length of one side in the longitudinal direction of the rectangle of the sheet-like product is 0.1 to 10 times the length of one side in the width direction.   The defect marking device according to claim 1, wherein the marking member is positioned at the center of one side in the width direction of each rectangle.   The defect marking device according to claim 1, wherein the marking member is pushed by a solenoid to perform marking.

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