JP4705402B2 - DEFECT MARKING DEVICE, SHEET MATERIAL MANUFACTURING METHOD, AND SHEET MATERIAL - Google Patents

Description

  The present invention relates to a defect marking device for a sheet material such as a synthetic resin film, and a method for manufacturing the sheet material.

  A sheet material such as a synthetic resin film, paper, metal foil, and a coated product thereof is wound into a roll after being manufactured, and is subjected to various processes in a factory at a shipping destination. In this case, the manufacturer of the sheet material inspects the surface of the sheet material for defects such as coating unevenness, scratches, and dirt, and if a defect is found, the portion is marked.

  In the inspection as described above, for example, the surface is photographed while feeding the sheet material in the longitudinal direction and image analysis is performed. If the size of the defect exceeds a predetermined level, it is determined that there is a defect, and marking is performed on the sheet material. Is going. Therefore, in a factory where the sheet material is processed, it is possible to know where the defect exists in the sheet material when the rolled sheet material (raw roll) is unwound.

  And as a marking method to the defective part of sheet material, for example, a method of automatically attaching a label to the edge of the sheet material (Patent Document 1), an inkjet printer or an ink pen near the defective part of the sheet material A marking method (Patent Document 2) has been proposed.

Japanese Patent Laid-Open No. 5-118996 (Claim 1) JP 2001-305070 A (paragraph number 0031)

  However, in the method of attaching a label to the end portion as in Patent Document 1, there is not always a defective portion in the vicinity of the label, and thus the defective portion cannot be easily confirmed in the next step. Also, in the next process, when slitting only the edges or cutting and dividing the whole into individual parts, the defective part will not be known, and defective products will be mixed into non-defective products. There was a risk of it.

  Further, in the method of marking near the defect portion as in Patent Document 2, when undried ink is present in the marking portion, the undried ink in the marking portion is transferred to the conveyance roll, and further, the subsequent sheet is transferred from the conveyance roll. The product was transferred to the material, and the non-defective part could not be used.

The sheet material defect marking apparatus of the present invention that solves the above-described problems is an inspection apparatus that detects defects in a continuously conveyed sheet material and acquires the position of the defect on the sheet material, and ink on the surface of the sheet material. a laminating apparatus for laminating a protective film having an absorbing layer, a marking device to mark on the ink absorbing layer of the protective film, the position of the defect obtained by the inspection apparatus and transmitted to the marking device, the ink absorbing layer of the protective film And a control device for controlling the marking device so as to perform marking at or near the position corresponding to the defect of the sheet material.

Moreover, the manufacturing method of the sheet material of this invention includes the process of following (a)-(c).
(A) a step of detecting a defect in the sheet material continuously conveyed and acquiring a position of the defect on the sheet material (b) a step of laminating a protective film having an ink absorbing layer on the surface of the sheet material (c) A process of marking at or near the position corresponding to the defect of the sheet material on the ink absorbing layer of the protective film

Further, the sheet material of the present invention is formed by laminating a protective film having an ink absorption layer on a sheet material having a defect, and a position corresponding to or near the defect of the sheet material on the ink absorption layer of the protective film. Is formed with markings.

  According to the defect marking device of the present invention, a protective film is laminated on a sheet material having a defect, and the present invention has a configuration in which a marking is formed at or near a position corresponding to a defect in the sheet material of the protective film. Sheet material can be produced.

  Such a sheet material of the present invention can easily determine a defective portion. Also, even if the undried ink in the marking part is transferred to the transport roll and then transferred from the transport roll to the subsequent sheet material, if the protective film is removed, the transferred sheet material can be used. The part will not be unusable. In addition, since marking is performed on the protective film, if it is determined that the marked part can be used by subsequent visual confirmation, the part can be used by removing the protective film. . Moreover, since marking is performed on the protective film, it is easier to confirm the marked portion than the case where the protective film is laminated after marking the sheet material.

  Moreover, according to the manufacturing method of the sheet material of this invention, the sheet material which has the above outstanding effects can be manufactured efficiently.

  Embodiments of the present invention will be described below.

  FIG. 1 is a diagram showing functional blocks of a defect marking apparatus 1 according to the present invention. As shown in FIG. 1, the sheet material 7 is sandwiched between rollers 8 serving as conveying means and conveyed while moving in the direction of arrow A, and is irradiated with light, a detecting means 22, a detecting means 23, and a defect position storing means 24. The inspection apparatus 2 consisting of

  A light irradiation means is provided below the sheet material. The irradiated light passes through the sheet material and is detected by the detection means. At this time, if there is a defect such as a foreign substance in the sheet material, the light transmittance detected by the detecting means changes. The detection means detects the transmitted light in correspondence with the position in the width direction of the sheet material. For example, the width direction of the sheet material can be divided into a plurality of regions, and the transmitted light in each region can be detected together with the position information. In FIG. 1, a defect is detected by transmitted light, but a defect may be detected by reflected light.

  The transmitted light at each position in the width direction detected by the detection means is compared with a predetermined reference value by the defect determination means to determine whether or not it is a defect. For example, when the light transmittance or light reflectance differs from the reference value by a certain value or more, it is determined that the region is a defect.

  When the defect determination means determines that the defect is present, the position information of the defect in the width direction of the sheet material is stored in the defect position storage means. In this case, the detection time information when the defect is detected by the detection means may be stored in the defect position storage means. Such detection time information may be sent directly to a control device that controls the marking position (hereinafter simply referred to as “control device”).

  The conveyance speed of the sheet material may be directly input to the control device, but a speed detection device may be installed. The conveyance speed detected by the speed detection device is given to the control device. The control device obtains time information until the defect detected by the inspection device is conveyed to the position of the marking device and arrives from the data of the conveyance speed and the distance between the inspection device and the marking device. The timing at which the marking device performs marking is controlled based on such time information. By controlling the timing as described above, it is possible to control the marking position in the conveyance direction of the sheet material. For such time information, for example, a pulse generator is provided in the control device, and a pulse is generated based on detection time information sent from the defect determination means or detection time information sent from the defect position storage means, and a predetermined number of pulses are counted. After that, the marking device can be controlled to perform the marking.

  Further, the position control of the marking means in the sheet width direction can be controlled based on the position information in the width direction of the defect from the defect position storage means. Such width position control is achieved when the marking means (pen, print head, etc.) is equipped with a movable marking device, and when the marking timing is controlled by the pulse generator pulse, the marking timing is controlled by the pulse that gives the marking timing. Position control in the width direction can be performed in synchronization with the previous pulse. That is, before the marking timing, the width direction is first controlled, and the marking is controlled at the timing controlled by the pulse generator after the width direction control, and the marking position in the width direction and the conveying direction of the sheet material is controlled. be able to. The length of the marking can be controlled by the marking time.

  Further, the position control in the sheet width direction of the marking means is performed, for example, by dividing the sheet material 7 into a plurality of areas in the width direction as shown in FIG. 2, and marking means (pen, print head, etc.) 41 for each of the divided areas. Can be carried out using a marking device comprising That is, marking may be performed by the marking means 41 corresponding to the area where the defect 10 is detected. In this way, marking can be performed in the vicinity of the position of the defect 10. Further, when the step of dividing the sheet material 7 in the width direction by slitting is performed, it is preferable that the sheet material 7 is divided so that the division and the division in the width direction coincide with each other in order to accurately exclude defective products.

  FIG. 3 is a diagram showing a configuration of the defect marking apparatus 1 of the present invention. As shown in FIG. 3, the sheet material 7 sent out from the roll 9 at the position B passes through the inspection device 2, and after the protective film is laminated by the laminating device 3, the sheet material 7 on the protective film becomes defective. Marking is performed by the marking device 4 at or near the corresponding position, and the film is wound around the roll 9 at the position C. The roll 9 at the position C is connected to a rotating device called a winder, and the sheet material 7 is conveyed by winding by the rotation of the winder.

  FIG. 4 is a diagram showing the positional relationship between the light irradiation means (fluorescent lamp) 21 and the detection means (CCD camera) 22 constituting the inspection apparatus 2. Other examples of the light irradiation means 21 include a halogen lamp and an optical fiber. As shown in FIG. 4, the fluorescent lamp 21 is provided so as to irradiate the entire width direction of the sheet material 7, and the CCD camera 22 is provided so as to capture the entire width direction of the sheet material 7. Further, the CCD camera 22 is provided so that the light transmittance can be detected for each predetermined region in the width direction of the sheet material 7. The state shown in FIG. 4 shows a state in which foreign matter is present on the sheet material 7 and the defect 10 is thereby present. The light irradiated from the fluorescent lamp 21 has a light transmittance that decreases or increases at a position where such a defect 10 exists, so that the position of the defect can be determined.

  For example, when the width of the sheet material 7 is 800 mm and this width is detected by the CCD camera with a resolution of 2000 bits, the length is 0.4 mm per bit. Accordingly, the position information is detected as to which bit the defect 10 is from the end with a length of 0.4 mm per bit. The size of the defect 10 can be detected by the number of bits. For example, when the defect 10 has a size of 2 mm in the width direction, it can be detected as a defect having a size of 5 bits.

  After the position of the defect in the sheet material is obtained, a protective film is laminated on the sheet material. The protective film can be divided into a type with a separator and a type without a separator. Examples of the type without a separator include films made mainly of polyethylene, polypropylene, or a mixture thereof. Examples of the type with a separator include those having an adhesive layer and a separator in this order on a polyester film.

  FIG. 5 is a diagram for explaining the state of lamination when laminating the sheet material 7 using the type of protective film 11 having no adhesive layer. In FIG. 5, the roll 9 is a roll of a protective film, and the protective film 11 is sent out from here. Then, the protective film 11 and the sheet material 7 are laminated between the two rollers 8.

  Since the protective film is removed later, it is laminated so as to be peelable from the sheet material. Therefore, it is preferable that the protective film has re-sticking / removability. Moreover, when using an ink pen or an inkjet printer as a marking means, it is preferable to have an ink absorption layer in the surface where the marking of a protective film is given. The protective film also has an effect as a carrier film when the sheet material is punched in a later step.

  Returning to FIG. 3, the light transmittance detected by the detection means of the inspection apparatus 2 and its position information are sent to the defect determination means and the defect position storage means. The light transmittance data sent from the detection means is compared with a predetermined reference value. If the reference value is different from the reference value by a certain value or more, it is determined as a defect, and the position information of the defect is stored. The position information of this defect is sent to the control device 5. The control device 5 controls the marking position and marking timing of the marking device 4 as marking means. The marking device 4 can be used without any limitation as long as it can mark the protective film, such as an ink pen, a ball-point pen, or an inkjet printer head. Based on the defect position information sent from the inspection device 2, the control device 5 moves and controls the marking means of the marking device 4 to the defect position. Alternatively, when the marking device 4 is provided with a plurality of marking means, the pen or printer head close to the position of the defect is controlled.

  A speed detection device is provided at an arbitrary location in the defect marking device of the present invention. The speed detection device detects the conveyance speed of the sheet material. This conveyance speed is given to the control device. When it is determined that the CCD camera has detected a defect, a detection signal is given from the defect determination means to the control device. By this detection signal, a predetermined pulse is oscillated from a pulse generator provided in the control device or the like. For example, when a pulse is generated so that the sheet material moves 0.25 mm in one cycle of the pulse and the distance from the detection position of the CCD camera to the position of the marking device is, for example, 300 mm, 300 / 0.25 = 1200, After 1200 pulses, the defective part reaches the position of the marking device. Therefore, it is only necessary to send a marking signal from the control device so that the marking device performs marking after counting 1200 pulses. Usually, prior to such marking timing, the marking position in the width direction is controlled.

  The position control of the sheet material in the width direction is performed as follows. For example, assume that the sheet material is divided into 2000 bits and the position information is recognized, and the position from the edge of the defect is 760 bits. In this case, if the marking means of the marking apparatus is movable, the marking means of the marking apparatus is controlled at a position corresponding to a distance corresponding to 760 bits so as to mark the defect position. Further, when there are a plurality of marking means of the marking device, the marking means in the area including 760 bits is controlled to mark near the defect. For example, when the defect 10 exists in the area B in FIG. 2, the marking means 41 corresponding to the area B is controlled.

  After controlling the position in the width direction of the marking means of the marking device in this way, or after controlling which marking means of the marking device provided with a plurality of marking means is used for marking, a marking signal is given. The length of the mark can be adjusted, for example, by counting the pulses of the pulse generator. For example, when one cycle of a pulse is 0.25 mm and a mark with a length of 20 mm is marked, a mark with a length of 20 mm can be marked by continuing marking for 80 pulses.

  Moreover, the defect marking apparatus of this invention may be equipped with the slitting apparatus which divides | segments a sheet material in the width direction by slitting. The position where the slitting device is provided is not particularly limited as long as it is from the time the sheet material is sent out until it is wound up, but it is preferably after passing through the inspection device, and after passing through the laminating device. It is more preferable that it is after passing through the marking device.

The sheet material of the present invention can be produced by performing the following steps (a) to (c) using the defect marking apparatus of the present invention as described above.
(A) a step of detecting a defect of the sheet material continuously conveyed and acquiring a position of the defect on the sheet material (b) a step of laminating a protective film on the surface of the sheet material (c) a sheet on the protective film Marking at or near the position corresponding to a material defect

  The sheet material of the present invention thus obtained is formed by laminating a protective film on a sheet material having a defect, and marking is formed at or near the position corresponding to the defect of the sheet material of the protective film. It becomes the composition which becomes. Therefore, it is possible to easily determine the defective portion. Also, even if the undried ink in the marking part is transferred to the transport roll and then transferred from the transport roll to the subsequent sheet material, if the protective film is removed, the transferred sheet material can be used. The part will not be unusable. In addition, since marking is performed on the protective film, if it is determined that the marked part can be used by subsequent visual confirmation, the part can be used by removing the protective film. .

The figure which shows one Example of the functional block of the defect marking apparatus of this invention The figure explaining position control of marking means The block diagram which shows one Example of the defect marking apparatus of this invention The figure explaining a light irradiation means and a detection means Diagram explaining the state of the laminate

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Defect marking apparatus 2 ... Inspection apparatus 21 ... Light irradiation means 22 ... Detection means 23 ... Defect determination means 24 ... Defect position storage means 3 ... Laminating apparatus 4 .... Marking device 41 ... Marking means 5 ... Marking device control device 6 ... Speed detection device 7 ... Sheet material 8 ... Roller 9 ... Roll 10 ... Defect 11 ... Protective film

Claims (3)

Detecting the defects of a sheet material that is continuously conveyed, a test device for obtaining a position of a defect on the sheet material, a laminating apparatus for laminating a protective film having an ink absorbing layer on the surface of the sheet material, the protective film A marking device that performs marking on the ink absorbing layer and a defect position acquired by the inspection device are transmitted to the marking device, and marking is performed at or near the position corresponding to the defect of the sheet material on the ink absorbing layer of the protective film. A defect marking device comprising a control device for controlling the marking device. The manufacturing method of the sheet material including the process of following (a)-(c).
(A) a step of detecting a defect in the sheet material continuously conveyed and acquiring a position of the defect on the sheet material (b) a step of laminating a protective film having an ink absorbing layer on the surface of the sheet material (c) A process of marking at or near the position corresponding to the defect of the sheet material on the ink absorbing layer of the protective film Defective portion formed by laminating a protective film having an ink absorbing layer on a sheet material having defects, and forming a marking at or near the position corresponding to the defect of the sheet material on the ink absorbing layer of the protective film Is specified sheet material.

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