JP2020019066A - Home position cutting method corresponding to position of plow pattern - Google Patents

Abstract

To provide a home position cutting method corresponding to a position of plow pattern without being affected by partial expansion/contraction difference and skew when drying paper.SOLUTION: This home position cutting method comprises: a plow pattern reading process in which a transmission image of plow pattern is acquired after drying process in a continuous paper making process; a cutting control mark application position determination process in which plow reference coordinate is calculated from a position of plow pattern acquired in the plow pattern reading process, and a cutting control mark application position is determined from the plow reference coordinate; a cutting control mark application process in which a cutting control mark is applied to the position determined in the cutting control mark application position determination process; and a cutting process in which the cutting control mark applied to the continuous paper is read, and the continuous paper is cut so that the plow pattern is positioned at a home position in a sheet unit.SELECTED DRAWING: Figure 1

Description

  According to the present invention, when cutting a continuous sheet on which at least one or more puncturing patterns are formed in a predetermined sheet unit, the puncturing pattern position is read so that the position of the puncturing pattern is constant. , And a method of cutting in position.

  Valuable products such as banknotes, stock certificates, and receivables are required to be difficult to be forged or tampered with, and a typical example of such forgery prevention technology is a penetration pattern observed under transmitted light. The piercing technique is generally formed in a paper making process using fibers of wood or the like as a raw material, and is formed by a long net method of embossing a wet paper using a circular net method or a dandy roll.

  The continuous paper with the pavement pattern formed in the paper making process is wound up after drying and cut into sheets in the next process, but if cut in place to cut into sheets of a certain size, Variations may occur in the positions of the cut-in patterns formed on each sheet of the paper, and uniform products cannot be manufactured. Therefore, the applicant of the present invention forms a registration mark that can be formed in the piercing step based on the piercing pattern position, and shoots the piercing registration mark in the transmitted light to be provided in the piercing step. A fixed position cutting method for cutting based on the registration mark has already been filed (for example, see Patent Document 1).

Japanese Patent No. 4437188

  However, the fixed position cutting method disclosed in Patent Document 1 performs the fixed position cutting based on the register mark provided in the wiping step of the wet paper web, so that the cutting based on the piercing position is possible. Since the registration marks are given in the wet paper in the piercing process, the difference between the expansion and contraction rate of the paper after the drying process and torsion may cause In some cases, it was not possible to cut at the designed position. Furthermore, when trimming a sheet of paper having a plurality of cut-in patterns formed thereon in a fixed position, variations may occur in the positions of the cut-in patterns formed on a plurality of surfaces and in the relative positions of the cut-in patterns and the register mark. As a result, there has been a problem that a plurality of plow patterns cannot be cut accurately at a fixed position.

  The present invention aims to solve the above-mentioned problems, and as a method for precisely cutting a continuous sheet on which at least one punctured pattern is formed in a paper making process, a continuous pattern having a punctured pattern formed thereon. After the paper drying process, read the insertion pattern position from the continuous paper on which the insertion pattern is formed in a dry paper state where expansion and contraction and twisting of the paper do not occur, and apply a cutting control mark based on the insertion pattern position. The method relates to a method for trimming a fixed position based on the trimming control mark.

  The in-position cutting method corresponding to the position of the interleaved pattern of the present invention, when cutting a continuous sheet having at least one or more interleaved patterns formed in a predetermined sheet unit into sheet units, This is a fixed-position cutting method corresponding to the position of the penetration pattern that is cut based on the position of the penetration pattern, and the penetration pattern reading that acquires a transparent image of the penetration pattern after the drying step in the continuous paper making process. A cutting control mark applying position determining step of calculating a cutting reference coordinate from the position of the cutting pattern acquired in the cutting pattern reading step, and determining a position where the cutting control mark is to be applied from the cutting reference coordinate, A cutting control mark providing step for providing a cutting control mark at the position determined in the cutting control mark providing position determining step, and reading the cutting control mark provided on the continuous paper to remove the continuous paper. Characterized by comprising at least a cutting step of putting the pattern is controlled to cut such that the position of the sheet in the unit, a position cut method corresponding to the plow insertion pattern position.

  Further, the cutting control mark providing position determining step in the in-position cutting method corresponding to the position of the cut-in pattern according to the present invention includes, when a plurality of cut-in patterns are formed per sheet, a plurality of cut-in pattern positions. Is calculated proportionally to calculate the insertion reference coordinates, and the position where the cutting control mark is to be applied is determined. This is a fixed position cutting method corresponding to the insertion pattern position.

  Further, the cutting control mark in the fixed position cutting method corresponding to the position of the cutting pattern of the present invention indicates the cutting position in the width direction and / or the flow direction of the continuous paper, and corresponds to the cutting pattern position. This is a fixed position cutting method.

  Further, in the fixed position cutting method according to the present invention, the cutting control mark is a printing mark and / or a perforation, and is a fixed position cutting method corresponding to a penetrating pattern position.

  The fixed position cutting method corresponding to the position of the cutting pattern according to the present invention calculates and determines the position where the cutting control mark is formed from the position of the cutting pattern after the drying step of the continuous paper, and applies the position. There is an effect that the fixed position cutting can be performed accurately without being affected by expansion and contraction when the paper is dried.

The figure which shows the example in which the cutting control mark (M) was formed in the continuous paper (1) in which the insertion pattern (2) was formed. The figure which shows an example of a structure of the fourdrinier paper machine used by embodiment of this invention. The figure which shows the process of cutting from a continuous sheet (14) to a sheet (15). The figure which shows the flowchart of the fixed position cutting method of this invention. The figure which shows an example of the apparatus structure on a paper machine. The figure which shows an example of the process which image | photographs several penetration patterns (2) formed in the continuous paper (1) by the penetration pattern imaging | photography apparatus (18). The figure which shows an example of the process which determines the cut-in reference | standard coordinate (S) and the cutting control mark coordinate (D) from the positional information of a cut-in pattern (2). The figure which shows an example of the process of printing a cutting control mark (M) on continuous paper (1). The figure which shows an example of the process which carries out fixed position cutting from the continuous paper (14) to a sheet (15) by fixed position cutting based on a cutting control mark (M). FIG. 4 is a view showing a cutting control mark (M) formed on a continuous sheet (1) of Example 1 in a papermaking process. The figure which shows an example of the apparatus structure on a paper machine. The positional relationship between a line camera (27) for photographing a penetration pattern (2) in the flow direction (T2) of the continuous paper (1) on a paper machine and an inkjet printer (22) for printing a trigger mark (T) and The figure which shows an example of a process. The figure which shows the setting method of an origin coordinate (O) etc. from the image imaged by the line camera (27). FIG. 2 is a diagram illustrating an example of a cutting machine used in the fixed position cutting method according to the first embodiment. The figure which shows the process which determines a piercing reference | standard coordinate (S) and the cutting control mark coordinate (D). FIG. 4 is a diagram illustrating a print position of a cutting control mark (M). The figure which shows the cutting process of the continuous paper (1) width direction by a slitter (16). The figure which shows the cutting process of the continuous paper (1) flow direction by a rotary cutter (17). The figure which shows an example of the apparatus structure on a paper machine. The figure which shows an example of the cutting machine used by a fixed position cutting method. The figure which shows the cutting process of the continuous paper (1) width direction by a slitter (16). The figure which shows the cutting process of the continuous paper (1) flow direction by a rotary cutter (17).

  An embodiment for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments described below, and includes various other embodiments within the scope of the technical idea described in the claims.

(First Embodiment)
FIG. 1 shows a state in which a cutting control mark (M) is formed on a continuous sheet (1) on which a plurality of cut-in patterns (2) to be cut by the fixed position cutting method of the present invention are formed. The continuous paper (1) on which a plurality of interstitial patterns (2) are formed as shown in FIG. 1 is cut at a fixed position for each sheet (15).

  The paper (1) to which the present invention is directed is a continuous paper (1) in which a weaving pattern (2) is formed in a papermaking process, and is generally produced by a fourdrinier paper machine, a circular paper machine or the like. It is a target. In the present embodiment, a continuous paper (1) which is provided with a penetration pattern (2) using a dandy roll will be described as an example with respect to a continuous paper (1) formed by a fourdrinier paper machine. However, the present invention is not limited to this, and it may be a process applied in a pressing process or a process in which a weaving pattern (2) is formed by a circular mesh method.

  First, a process of giving a puncturing pattern (2) to continuous paper (1) made by a Fourdrinier will be described with reference to FIG. FIG. 2 is a view showing a fourdrinier paper machine, which is roughly divided into a preparation section (3), a wire section (4), a press section (5), a drying section (7), a calendar section (11), and a reel section. The preparation unit (3) removes large foreign matter such as tangling or agglomeration of the raw material of the continuous paper (1) and prepares a stock material in which the raw material is dispersed.

  In the wire part (4), the continuous paper (1) is formed into a sheet while promoting the basis weight balance and the dispersion of the fibers in the width direction (T1), but the formation of the wet paper and the surface of the wet paper are improved. A dandy roll (13) for smoothing is installed, and a method of partially removing the surface of the dandy roll (13) or forming an arbitrary plow pattern (2) by forming a convex pattern portion is formed. can do. Further, the wet paper is dehydrated by applying pressure to the wet paper in the press section (5) and sent to the drying section (7).

  In the prior art, the dragonfly mark for fixed-position cutting is formed at the timing of forming the puncturing pattern (2) with the dandy roll (13). It can be given as a cutting control mark having extremely high correlation with the position of 2).

  An expander roll (6) is provided between the press section (5) and the drying section (7), and has a curved shape in order to prevent wrinkles and folds of the continuous paper (1) generated in the drying step. By deforming the shape (curvature amount) of the expander roll (6) formed in (1), the twist and the like of the continuous paper (1) are adjusted.

  The drying section (7) includes a pre-dryer section (8), a size part (9), and an after-dryer section (10). The pre-dryer section (8) includes a plurality of dry cylinders, and is a wet paper web continuous paper (1). ) Is dehydrated and dried. Similarly, the after-dryer section (10) includes a plurality of dry cylinders, and adjusts the water content in the continuous paper (1) to a control target value. In the steps of the press section (5) and the drying section (7) so far, expansion and contraction and twisting of the continuous paper (1) occur, so that the continuous paper (1) is provided as a position of a plurality of penetration patterns (2) and a cutting control mark. Since there is an error in the positional relationship with the registration mark, even if cutting is performed at the fixed position based on the registration mark, a deviation occurs at a plurality of the insertion patterns (2).

  For the purpose of reducing paper dust on the continuous paper (1) and improving printability, a size part (9) is provided between the pre-dryer section (8) and the after-dryer section (10), and a chemical solution or the like is applied to the continuous paper (1). 1) It may be applied to the surface. The calendar unit (11) adjusts the smoothness and thickness of the surface of the continuous paper (1) by passing the continuous paper (1) between a plurality of calender rolls to which a predetermined pressure is applied.

  Since the continuous paper (1) that has passed through the calendar section (11) is in a state in which deformation such as expansion and contraction and twisting has been completed, the cutting control mark (M) of the present invention indicates that the continuous paper (1) has been dried, , An image of the continuous paper (1) on which the interstitial pattern (2) is formed between the calendar section (11) and the reel section (12), and further, a cutting control mark (M) is formed from the captured image. , The cutting control mark (M) corresponding to the insertion position can be obtained. Since the continuous paper (1) after the calendar section (11) has already been dried and has undergone deformation such as expansion and contraction and twisting, and has become a stable dry paper, the position of the weaving pattern (2) is set at this position. By providing the reading and cutting control mark (M), the relative positional relationship with the position of the plowing pattern (2) is not broken.

  The continuous paper (1) provided with the cutting control mark (M) is wound by the reel unit (12), and the wound paper (14) wound by the reel unit (12) is sent to the cutting process. In-process trimming is performed in the process.

  FIG. 3 shows a process of cutting the web (14) on which a plurality of interleaving patterns (2) are formed into sheets (15). The web (14) shown in FIG. 3 is formed by forming a continuous sheet (1) including three sheets (15) in the width direction (T1), and is slit by the slitter (16). The sheet (15) is cut in the flow direction (T2) by the rotary cutter (17), and cut into a predetermined size. At this time, the position control of the web 14 in the width direction (T1) and the cutting timing in the flow direction (T2) are controlled based on the cutting control mark (M).

  The above is the method of cutting the continuous paper (1) formed by the fourdrinier paper machine in the first embodiment at a fixed position. The web paper (14) after the paper making process is cut in a separate cutting process. Although the present invention has been described with reference to the method of cutting at a fixed position, the present invention detects the position of the cutting pattern (2) from the continuous paper (1) in the dry state after the drying step in the papermaking step, and detects the cutting control mark (M ) And a device that performs a series of processes from papermaking to cutting by a series of mechanisms as long as the process can perform fixed position cutting based on the cutting control mark (M). is there.

  Next, the fixed position cutting method corresponding to the insertion position according to the present invention will be described with reference to the flowchart of FIG. As shown in FIG. 4, the fixed position cutting method of the present invention includes a cutting pattern reading step (S1), a cutting control mark applying position determining step (S2), a cutting control mark applying step (S3), and a cutting step (S4). At least.

  FIG. 5 shows an apparatus configuration for photographing a penetration pattern (2) after a drying process on a paper machine and forming a cutting control mark (M), and includes a calendar section (11) and a reel section. Between (12), a plow pattern photographing device (18), a lighting device (19), an application device (20), and a control device (21) are provided. The illuminating device (19) is used when the piercing pattern (2) is photographed as a transmission image. When the piercing pattern (2) can be photographed accurately as a reflection image, the illuminating device (19) is used. No need to use.

  The applying device (20) may be of any configuration as long as it can accurately apply the cutting control mark (M). The applying device (20) may be formed by using a printing method such as an inkjet method, a method of perforating using a laser marker, or embossing. This includes all configurations to which the cutting control mark (M) can be added, including other configurations such as a method of performing the cutting.

  The control device (21) adjusts the timing for photographing the penetration pattern (2), stores various conditions and a photographed image, sets reference coordinates from a plurality of penetration pattern (2) positions, and sets a plurality of clearances. It is provided with at least an operation unit for performing an operation such as apportionment from an image obtained by reading the insertion pattern (2), and an instruction unit for instructing the addition of a cutting control mark (M).

(Plunging pattern reading process)
Next, the fixed position cutting method corresponding to the plow pattern position according to the present invention will be described. First, as a step 1, a penetration pattern (2) given to the continuous paper (1) after the calendar section (11) is photographed. As shown in FIG. 5, the photograph of the position of the penetration pattern (2) is taken by a penetration pattern photographing device (18) provided between the calendar section (11) and the reel section (12).

  The penetration pattern photographing device (18) is not particularly limited as long as the position of the penetration pattern (2) of the conveyed continuous paper (1) can be accurately imaged, but preferably, the continuous paper (1) is sandwiched. By providing an illumination device (19) on one side and a penetration pattern photographing device (18) on the other side, the penetration pattern (2) is photographed as a transmission image. In addition, in order to simultaneously photograph the positions of the plurality of penetration patterns (2), the line camera (27) and the area camera shown in FIG. ) Can be taken simultaneously. Further, the illumination device (19) may be provided with a diffusion plate on the light emitting surface so as to uniformly irradiate the light in the width direction (T1) of the sheet.

  The image of the penetration pattern (2) is photographed using a rotary encoder or the like so that the resolution becomes constant with respect to the moving distance of the sheet (1) in the flow direction (T2). The image of ()) is transmitted to the control device (21).

The image of the interstitial pattern (2) is photographed for each sheet (15) cut in the next step, and the photographing timing in the flow direction (T2) of the sheet (1) is determined by the sheet (15). ) A mark may be provided for each unit, and the timing may be adjusted using the mark as a trigger signal. Further, the position coordinates (y _s ) in the flow direction (T2) in the penetration pattern (2) are calculated from the image obtained by photographing the predetermined range, and the position values (y _s ) are reflected by reflecting the coordinate values in the timing. The shooting timing in the flow direction (T2) may be adjusted by adjusting the position of the penetration pattern (2) so as to be at a fixed position.

  The position information of the captured interstitial pattern (2) is obtained by using a general image processing method such as edge search or pattern matching using the control device (21) for the captured image using two-dimensional coordinates (x, y). ).

(Cutting control mark position determination step)
Next, the cutting control mark position determination step (S2) in step 2 will be described. In the cutting control mark position determining step (S2), as shown in FIG. 7, from the position information of the cutting pattern (2) acquired in the cutting pattern reading step (S1), reference coordinates for fixed position cutting are obtained. determining the plow insertion reference coordinates _{(S) (x s, y} s) and cutting control mark coordinates for controlling the cutting position _{(D) (x d, y} d). At this time, an arbitrary point in the area of the photographed image is set as the origin coordinate (O) (x ₀ , y ₀ ).

  If the cut-in pattern (2) is cut at a fixed position in units of a sheet (15) on which a single cut-in pattern (2) is formed, the position of the cut-in pattern (2) becomes the cut-in reference coordinate (S), and In the two-dimensional coordinates with respect to the insertion reference coordinates (S), the relative constant positions (a, b) may be appropriately set according to the size of the sheet (15).

  When a continuous sheet (1) in which a plurality of interleaving patterns (2) are formed in a unit of a sheet (15) is cut at a predetermined position in a unit of a predetermined sheet (15), the continuous sheet (15) is used. In the case where the arrangement between the plurality of puncturing patterns (2) is varied due to expansion and contraction or twisting at the time of drying which occurs in 1), and it is not possible to perform the in-position cutting in which all the puncturing patterns (2) are accurately arranged. There is. In this case, the reference coordinates (S) are calculated by the calculation unit of the control device (21) by apportioning them so that all of the penetration patterns (2) are arranged closest to the fixed position. At this time, the positions of all the shot patterns (2) photographed may be proportionally divided. For example, the positions of the cut pattern (2) provided at the four corners of the sheet (15) may be proportionally divided. Good. In the present invention, “proportionation” refers to allocation in consideration of the positions of a plurality of plowing patterns (2), for example, calculating an average position, calculating the center of gravity, and the like.

In the case of apportioning the four corner plow patterns (2), as shown in FIG. 7, the plow patterns (2) b (x ₁ , y ₁ ), b (x ₂ , y ₂ ), c (x ₃ , y) ₃ ), the reference coordinate (S) for the clearance (x ₄ , y ₄ ) is ((x ₁ + x ₂ + x ₃ + x ₄ ) / 4, (y ₁ + y ₂ + y ₃ + y ₄ ) / 4) next, cutting control mark coordinate (D) _is a _{((x 1 + x 2 +} x 3 + x 4) / 4 + a, (y 1 + y 2 + y 3 + y 4) / 4 + b).

  At this time, since the distance (a, b) from the insertion reference coordinate (S) to the cutting control mark coordinate (D) is always relatively constant, the cutting control mark (M) is always plural. This indicates a position where the position of the plow pattern (2) is proportionally divided.

(Cutting control mark applying step)
Next, the cutting control mark providing step (S3) in step 3 will be described with reference to FIGS. In the cutting control mark applying step (S3), the cutting control mark (M) determined in the cutting control mark position determining step (S2) in step 2 is applied. As shown in FIG. 5, the cutting control mark (M) is provided between the calendar section (11) and the reel section (12) at a position downstream of the above-mentioned piercing pattern photographing apparatus (18). 20).

  The cutting control mark (M) may be formed by any method as long as it can be read in the next cutting step. For example, a method of forming a print mark by printing, a method of perforating with a laser marker or the like, and the like may be used. Just choose. In the first embodiment, an example will be described in which a cutting control mark (M) is provided by printing using an inkjet printer (22).

  The cutting control mark (M) is provided with the position information determined in the cutting control mark position determining step (S2) of step 2 by the inkjet printer (22) shown in FIG. 8 based on an instruction from the control device (21). . At the time of applying the cutting control mark (M), the direction of the print nozzle, the head position, the printing shape, and the like with respect to the width direction (T1) of the continuous paper (1) are controlled, and the flow direction (T2) of the continuous paper (1) is controlled. By measuring the distance with a rotary encoder, it is possible to print an accurate cutting control mark (M) at the cutting control mark coordinates (D) obtained in the cutting control mark position determination step (S2).

(Cutting process)
Next, the cutting process in step 4 will be described. In the present embodiment, the process up to the application of the cutting control mark (M) in step 3 is performed on the paper machine, and the cutting process in step 4 is performed from the web (14) produced by the paper machine to a cutting device in another process. The step of cutting the sheet into sheets (15) using the method described above is not limited to this step, but the steps 1 to 4 can be manufactured by a series of devices, that is, the continuous paper that has been formed. A mode in which the process shifts to the cutting step without winding (1) is also within the scope of the present invention.

  FIG. 9 shows a cutting apparatus used in the first embodiment, and shows a sheet (15) for three sheets in the width direction (T1) and a web (14) on which a cutting control mark (M) is formed. An example will be described. The web (14) is transported in the flow direction (T2), and the cutting control mark (M) is detected by the width direction position detector (23). A control signal is transmitted from a control device (not shown) to the slitter (16) so that the sheet is cut to a fixed position in the width direction (T1) in accordance with the position of the detected cutting control mark (M). , The cutting in the width direction (T1) is executed by the slitter (16).

  A reflection sensor, an area sensor, a line camera, or the like can be used as the width direction position detector (23). The position in the width direction (T1) can be read by any method such as edge detection or image pattern matching.

  The cutting in the flow direction (T2) is detected by detecting the position of the cutting control mark (M) in the flow direction (T2) by the flow direction position detector (24) installed downstream of the slitter (16). According to the position of the cutting control mark (M), a control signal is transmitted from a control device (not shown) to the rotary cutter (17) so as to be cut to a fixed position in the flow direction (T2), and based on the control signal. The cutting in the flow direction (T2) is executed by the rotary cutter (17).

  A reflection type sensor, an area sensor, a line camera, or the like can be used as the flow direction position detector (24). By performing the trimming at the fixed position based on the trimming control mark (M) in the trimming process, the position of the cut-in pattern (2) on the sheet (15) has the minimum fixed position or the minimum distance from the fixed position.

(Second embodiment)
In the second embodiment of the present invention, an example will be described in which a cutting control mark (M) is provided by punching. It should be noted that the piercing pattern reading step (S1) and the trimming control mark position determining step (S2) are the same as those in the first embodiment, and thus description thereof will be omitted.

  In the cutting control mark providing step (S3) according to the second embodiment, a laser marker (32) is used instead of the inkjet printer (22) that is the providing device (20) used in the first embodiment. A cutting control mark (M) is provided by punching.

  In the second embodiment, an example will be described in which a laser marker (32) is used as an application device (20) for applying a cutting control mark (M) by punching. However, a cutting control mark by punching a continuous sheet (1) is described. Any device that can form (M), for example, a hydraulic perforation device, may be used. Further, the position where the laser marker (32) is installed may be the same as the position where the inkjet printer (22) is installed in the first embodiment, or may be a different position.

  In the cutting step of Step 4, it is preferable to use a transmission sensor (33) in order to detect the cutting control mark (M) given by the perforation with high accuracy. Further, the other cutting step (S4) is the same as in the first embodiment, and a description thereof will be omitted. In addition, when the cutting control mark (M) is provided by perforation, compared to the case of applying the printing by an ink jet printer or the like, there is no adhesion of ink or the like to the continuous paper (1). This is a more preferable mode because contamination of the paper stock with contamination is suppressed when performing.

  Hereinafter, an embodiment of the in-position cutting method corresponding to the penetrating pattern position of the present invention will be described. However, the present invention is not limited to this embodiment, and the technical idea described in the claims is described. Various other configurations are included within the scope.

(Example 1)
A fixed-position cutting method using continuous paper (1) in which an L-shaped cut-in pattern (2) is formed by a dandy roll (13) of a fourdrinier paper machine shown in FIG. 2 will be described. The production conditions for the continuous paper (1) were a papermaking speed of 50 m / min and a cutting speed of 80 m / min.

  As shown in FIG. 10, the size of the continuous paper (1) was 500 mm in the width direction, and the distance between the penetration patterns (2) formed in the flow direction (T2) was provided at 1,100 mm intervals. The dimensions of the sheet (15) cut from the continuous paper (1) are 300 mm in the width direction (T1) and 1,000 mm in the flow direction (T2), and are L-shaped as a penetration pattern (2). The position of the intersection was at the center of the continuous paper (1). The shape of the cutting control mark (M) was a cross shape of 10 mm in the width direction (T1) × 10 mm in the flow direction (T2), and the coordinates of the cutting control mark (D) were intersections of the cross.

(Device configuration)
Next, an apparatus configuration for executing steps 1 to 3 in the in-position cutting method according to the first embodiment will be described with reference to FIG. As shown in FIG. 11, a printing machine (25) for providing a trigger mark (T) for timing adjustment with respect to the flow direction (T2) of the paper (1) downstream of the calendar section (11) of the paper machine. A reflection sensor (26) for detecting a printed trigger mark (T), an illuminating device (19) for photographing a transmission image of a penetration pattern (2), and a line camera (27) of 4096 pixels And an inkjet printer (22) for applying a cutting control mark (M) to the continuous paper (1) and a control device (21). Further, in the lighting device (19), a diffusion plate was provided on the light emitting surface so as to irradiate light uniformly in the width direction (T1) of the sheet.

  The control device (21) includes a storage unit for storing timing information from the reflection-type sensor (26), an image of the penetration pattern (2) photographed by the line camera (27), various photographing conditions, and the like. A calculation unit for calculating the position of the cutting control mark (M) from the pattern (2) position by calculation, an instruction unit for instructing the inkjet printer (22) to apply the cutting control mark (M), and other operations are included. The configuration includes a control unit for controlling the operations of the insertion pattern photographing device and the applying device.

  As for the positional relationship between the line camera (27) and the inkjet printer (22), as shown in FIG. 12, 2,000 mm downstream from the shooting position of the line camera (27) in the flow direction (T2), and the line camera (27). An ink jet printer (22) is installed on the front side of the paper (1) at a position 150 mm to the left when viewed from the center of the field of view, and a cutting control mark (M) is placed on the surface of the paper (1) at a position specified by the control device (21). ) Is printed.

  A rotary encoder (not shown) is brought into contact with the surface of the continuous paper (1) conveyed between the line camera (27) and the ink jet printer (22), and the line camera (27) follows a pulse signal from the rotary encoder. Each time the continuous paper (1) was conveyed by 0.1 mm, an image of one line in the width direction was taken. The photographing range was 400 mm in the width direction (T1) and 1,000 mm in the flow direction (T2). The line camera (27) used the central 4,000 pixels among the 4,096 pixels. Therefore, the resolution of the image was about 0.1 mm / pixel in the width direction (T1) and 0.1 mm / pixel in the flow direction (T2).

As shown in FIG. 13, the image taken by the line camera (27) on the paper machine was composed of 4,000 pixels in the width direction (T1) and 10,000 pixels in the flow direction (T2) of the continuous paper (1). . The position of the pixel in the width direction (T1) is represented by an x coordinate (0 to 3,999), and the position of the pixel in the flow direction (T2) is represented by a y coordinate (0 to 9,999). The position of (x ₀ , y ₀ ), which is the origin coordinate (O), is set to the upper left position when viewed from the surface of the continuous paper (1) when the downstream side of the continuous paper (1) is upward. . Hereinafter, the one closer to the origin in the positional relationship on the image will be referred to as the minus side.

  Next, the cutting process (S4) of Step 4 will be described. The cutting process (S4) in Example 1 was performed using the cutting device shown in FIG. The description of the device configuration after the cutting step (S4) will be omitted. As shown in FIG. 14, the cutting device includes a slitter (16) for cutting the web (14) in the width direction (T1) and a rotary cutter (17) for cutting the web (14) to the size of the sheet (15) in the flow direction (T2). ). Further, in order to detect the position where cutting in the width direction (T1) is performed by the slitter (16), an area camera (30) is installed 1,000 mm upstream of the slitter (16), and 100 mm upstream of the area camera (30). The reflection type sensor (28) was installed, and the reflection type sensor (31) was installed 500 mm upstream of the rotary cutter (17).

  The area camera (30) shoots an area of 100 mm in the width direction (T1) × 100 mm in the flow direction (T2) of the web (14) at 1,000 pixels × 1,000 pixels. Therefore, the resolution of the area camera (30) was 0.1 mm / pixel in both the width direction (T1) and the flow direction (T2).

In the image taken by the area camera (30), pixel positions in the width direction (T1) are represented by x coordinates (0 to 999), and pixel positions in the flow direction (T2) are represented by y coordinates (0 to 999). The position (x ₀ , y ₀ ), which is the origin of the coordinates, is the upper left position when viewed from the surface of the web (14) when the upstream side of the web (14) is turned upward.

  The installation positions of the slitter (16) and the area camera (30) were adjusted so that the center (x coordinate = 500) in the width direction (T1) of the image captured by the area camera (30) was cut by the slitter (16). .

(Adding a cutting control mark on the paper machine)
First, the penetration pattern reading step (S1) of step 1 will be described with reference to the apparatus configuration of FIG. First, in order to determine the shooting timing in the flow direction (T2) of the continuous paper (1), the trigger mark (T) shown in FIG. At 26), the trigger mark (T) is detected as a trigger signal, and the trigger signal is transmitted to the control device (21). Based on the trigger signal, the control device (21) instructed the timing for photographing the wiping pattern (2) with the line camera (27), and photographed an image of 1,000 mm in the flow direction (T2).

  Next, the cutting control mark position determination step (S2) in step 2 will be described. As a method of setting the reference coordinates from the cut-in pattern (2) photographed in the cut-in pattern reading step (S1) in step 1, the reference of the cut-in pattern (2) registered in the storage unit of the control device (21) in advance is used. A method of specifying a coordinate position by pattern matching for comparison with an image was used.

As shown in FIG. 15, the coordinates of the insertion reference coordinates (S) and the coordinates of the cutting control mark (D) are the coordinates at the intersection of the L-characters in the coordinates of the detected insertion pattern (2). _S) (x _s, and y _s), was determined as followed cutting control mark coordinate (D). Applying position of the cutting control mark (M) is plow insertion reference coordinates _{(S) (x s, y} s) relative to the width direction on the image (T1) -150 mm, the position of the flow direction (T2) -500 mm for printing cut control mark (M), was a cut control mark coordinates _{(D) = (x s -1,500} , y s -5,000).

The ink jet printer (22) for applying the cutting control mark (M) is set at -150 mm in the width direction (T1) and -2,000 mm in the flow direction (T2) based on the center of the line camera (27). because you are, when referred to the position image of the ink-jet printer (22) virtual coordinates _{I = (x I, y I} ) as, I = (500, -10,000) it became.

For printing cut control mark to the position of the cutting control mark coordinates inkjet printer (22) (D) (M ), when determining the position of the cutting control mark coordinates (D) with respect to _{I x = (x s -1500)} - 500, y = became positional relationship (y _s -5,000) +10,000.

As shown in FIG. 16, when this is converted into a distance, the resolution of the image is 0.1 mm / pixel in both the width direction (T1) and the flow direction (T2). the _{(T1) (0.1 x s -200} ) mm, (0.1 y s +500) in the flow direction (T2) position of mm became printing position of the cutting control mark (M).

  Next, the cutting control mark providing step (S3) of Step 3 will be described. The control device (21) instructs the inkjet printer (22) on the printing position of the cutting control mark (M), and the inkjet printer (22) instructs the cutting control mark (M) according to the instruction from the control device (21). The print position of M) is controlled for printing. The printing position in the width direction (T1) is controlled by changing the ink ejection direction of the ink jet printer (22), and the printing position in the flow direction (T2) is controlled by integrating the pulses of the rotary encoder and converting it into distance. did.

Next, the cutting process (S4) in step 4 will be described with reference to FIGS. As shown in FIG. 17, the reflection waveform of the cutting control mark (M) printed on the surface of the web (14) is detected by a reflection type sensor (28) installed upstream of the slitter (16) of the cutting machine, and the area is detected. The x-coordinate (x _d ) of the cutting control mark coordinate (D) of the cutting control mark (M) in the cutting machine is calculated from the image taken by the area camera (30) as a trigger signal of the camera (30) by a pattern matching method. did.

The slitter position controller (29) changes the position in the width direction (T1) so that the coordinate _{xd in} the width direction (T1) of the position of the cutting control mark (M) becomes 500, and the cutting control mark (M) is changed. ) Is controlled so that the position coordinate (x) in the width direction (T1) of the web (14) becomes 500. As a result, the intersection of the cutting control marks (M) could be cut accurately by the slitter (16).

  Then, as shown in FIG. 18, the waveform of the trimming control mark (M) remaining after the slitter (16) is changed using a reflective sensor (31) installed upstream of the rotary cutter (17) of the trimming machine. Detected and used as a trigger signal of the rotary cutter (17), and when the reflection type sensor (31) detects the waveform of the cutting control mark (M) and conveys the paper (1) by 500 mm, the rotary cutter (17) detects the waveform. The web (14) was cut. As a result, the rotary cutter (17) was able to accurately cut the print image of the cut control mark (M).

  In the cutting pattern (2) of the sheet (15) using the in-position cutting method corresponding to the position of the cutting pattern (2) in the first embodiment, all the L-shaped intersections are at the center of the sheet (15). And confirmed that it was cut in position.

(Example 2)
The in-position cutting method according to the second embodiment will be described with reference to FIGS. The in-position cutting method according to the second embodiment is such that the cutting control mark (M) is provided by punching using a laser marker (32) instead of the ink jet printer provided with the cutting control mark (M) in the first embodiment. Except for the cutting control mark providing step (S3) and the cutting step (S4), the continuous paper (1), the apparatus configuration, and other steps are all the same, and a description thereof will be omitted.

(Device configuration)
As shown in FIG. 19, a laser marker (32) was used as a device for giving a cutting control mark (M), and the continuous paper (1) was given a cutting control mark (M) by punching. The laser marker (32) was installed at the same position as the inkjet printer (22) in the first embodiment. The shape and size of the cutting control mark (M) were the same as those in Example 1.

  The perforation in the width direction (T1) was controlled by changing the laser irradiation direction of the laser marker (32), and the perforation in the flow direction (T2) was controlled by integrating the pulses of the rotary encoder and converting it into a distance. .

  FIG. 20 shows the cutting device used in the second embodiment. The difference from the cutting device of the first embodiment is that the cutting device is transmitted through the illumination device (19) in order to accurately detect the cutting control mark (M) formed by perforation. An illumination device (19) was installed at a position corresponding to the area camera (30) using the pattern sensor (33).

(Adding a cutting control mark on the paper machine)
Steps 1 and 2 were executed in the same manner as in Example 1, and as a cutting control mark providing step (S3) of Step 3, a cutting control mark (M) was formed by punching with a laser marker (32).

Next, the cutting process (S4) in step 4 will be described with reference to FIGS. As shown in FIG. 21, the reflection type sensor (31) installed upstream of the slitter (16) of the cutting machine detects the transmission waveform of the cutting control mark (M) formed by perforation and detects the transmission waveform of the area camera (30). As a trigger signal, the x coordinate (x _d ) of the cutting control mark coordinate (D) of the cutting control mark (M) in the cutting machine was calculated from the transmitted image taken by the area camera (30) by a pattern matching method.

The slitter position controller (29) changes the position in the width direction (T1) so that the coordinate _{xd in} the width direction (T1) of the position of the cutting control mark (M) becomes 500, and the cutting control mark (M) is changed. ) Is controlled so that the position coordinate (x) of the sheet (1) in the width direction (T1) becomes 500. As a result, the intersection of the cutting control marks (M) could be cut accurately by the slitter (16).

  Subsequently, as shown in FIG. 22, the transmission waveform of the cutting control mark (M) remaining after the slitter (16) is detected using a transmission type sensor (33) installed upstream of the rotary cutter (17) of the cutting machine. Is detected as a trigger signal of the rotary cutter (17), and when the sheet (1) is conveyed 500 mm after the transmission type sensor (33) detects the transmission waveform of the cutting control mark (M), the rotary cutter (17) is detected. ) To cut the paper (1). As a result, the rotary cutter (17) was able to accurately cut the print image of the cut control mark (M).

  In the cutting pattern (2) of the sheet (15) using the in-position cutting method corresponding to the position of the cutting pattern (2) of the second embodiment, all the L-shaped intersections are at the center of the sheet (15). And confirmed that it was cut in position.

REFERENCE SIGNS LIST 1 continuous paper 2 insertion pattern 3 preparation section 4 wire section 5 press section 6 expander roll 7 drying section 8 pre-dryer section 9 size part 10 after-dryer section 11 calendar section 12 reel section 13 dandy roll 14 take-up paper 15 sheet 16 slitter 17 Rotary cutter 18 Plunge pattern photographing device 19 Illumination device 20 Applying device 21 Control device 22 Inkjet printer 23 Width direction position detector 24 Flow direction position detector 25 Printing machine 26 Reflection type sensor 27 Line camera 28 Reflection type sensor 29 Slitter position control Device 30 Area camera 31 Reflection sensor 32 Laser marker 33 Transmission sensor O Origin coordinate S Plunging reference coordinate D Cutting control mark coordinate M Cutting control mark T Trigger mark T1 Width direction T2 Flow direction S1 Plunging pattern reading step 2 cut control mark attaching position determining process S3 cutting control mark attaching step S4 cutting step

Claims (4)

When cutting a continuous sheet on which at least one or more cut-in patterns are formed in a predetermined sheet unit into the sheet units, the position of the cut pattern that is cut based on the position of the cut pattern Is a position cutting method corresponding to
After the drying step in the papermaking step of the continuous paper, a penetration pattern reading step of obtaining a transmission image of the penetration pattern,
A cutting control mark applying position determining step of calculating a cutting reference coordinate from the position of the cutting pattern acquired in the cutting pattern reading step, and determining a position to which a cutting control mark is to be applied from the cutting reference coordinates,
A cutting control mark providing step of providing the cutting control mark at the position determined in the cutting control mark providing position determining step,
A cutting step of reading the cutting control mark provided on the continuous sheet, and controlling the cutting pattern of the continuous sheet so that the insertion pattern is at a fixed position in the sheet unit. Position cutting method corresponding to the plow pattern position. The cutting control mark providing position determining step,
When a plurality of the cut-in patterns are formed in the sheet unit, the positions of the plurality of the cut-in patterns are proportionately calculated to calculate the cut-in reference coordinates, and the position at which the cutting control mark is given is determined. The fixed position cutting method according to claim 1, wherein the position is determined.   The fixed position cutting method according to claim 1 or 2, wherein the cutting control mark indicates a cutting position in a width direction and / or a flow direction of the continuous paper.   The fixed position cutting method according to any one of claims 1 to 3, wherein the cutting control mark is a printing mark and / or a perforation.

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