JP4353725B2 - Laser processing system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laser processing system that performs processing to form a predetermined number of micro holes by irradiating a continuous processing medium to be conveyed with laser light.
[0002]
[Prior art]
In recent years, it has become popular to perform laser processing by irradiating a processing medium such as paper with a laser beam. Application examples of laser processing include, for example, watermark formation and anti-counterfeiting processing. In addition to forming a through-hole in the thickness direction on the processing medium, it is formed obliquely with respect to the thickness direction. Has also been done. Realization of simplification of the system configuration in the case of forming such an oblique through hole is desired.
[0003]
2. Description of the Related Art Conventionally, for example, what is described in the following patent documents is known as performing a predetermined process by irradiating a processing medium such as paper with a laser beam, for example, performing a forgery prevention process.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2003-11558
In the laser processing described in the above-mentioned patent document, an identification mark for authenticity determination is formed by an assembly of microscopic holes formed by irradiating laser light at three different angles, and the three different angles. Are disclosed as being oblique (downward to the left), vertical, and oblique (downward to the right) with respect to the thickness direction.
[0006]
[Problems to be solved by the invention]
By the way, in the above-mentioned patent document, when the identification mark for authenticity determination is formed at three different angles, the processing medium (commodity) with respect to the fixed laser irradiation angle (perpendicular to the thickness direction of the processing medium). It is shown that the ticket is inclined at this angle. Although it is possible to incline the processing medium at a predetermined angle, what is important is to simplify the mechanism configuration for inclining.
[0007]
That is, the present invention has been made in view of the above problems, and an object of the present invention is to provide a laser processing system that can easily configure a predetermined angle in a processing region with respect to the processing surface of a continuous processing medium.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the invention of claim 1, a predetermined number of minute holes with a predetermined angle with respect to the thickness direction of the continuous processing medium are formed by irradiating the continuous processing medium to be conveyed with laser light. A laser processing system for performing processing,
First driving means for moving a predetermined number of first roller parts supporting the continuous processing medium to be conveyed in the vertical direction;
A second driving unit that moves a predetermined number of second roller units that suspend and support the continuous processing medium between the first roller unit and the continuous processing medium to be conveyed; A laser irradiation means disposed on a processing region between the first roller portion and the second roller portion and forming the predetermined number of microholes by laser irradiation from the vertical direction with respect to the continuous processing medium; and at least the laser The irradiation unit is driven based on predetermined processing data, and at least one of the first driving unit and the second driving unit is driven to move at least one of the first roller unit and the second roller unit in the vertical direction. Adjusting the horizontal, right-up, or left-down angle of the micropores formed by laser irradiation on the continuous processing medium by moving the microprocessing unit at the microhole forming position of the continuous processing medium. The continuous processing medium distance in a state of being the focal length is constant by causing the constant until the laser irradiation position upon driving the first roller portion and the second roller portion both above and below in order to with the angle that In the case where the first roller unit and the second roller unit are in a horizontal state at a position where the focal length is constant, the movable amount of the first driving unit and the second driving unit to be in the horizontal state is set. When generating and commanding the movable amount to make it other than the horizontal state, the first driving unit and the second driving unit are referred to the horizontal state of the first roller unit and the second roller unit. a structure and a control process unit you command defines the large lowering movable amount from increasing movable amount of driving amount from the horizontal state.
[0011]
In this way, a predetermined number of micro holes formed by laser irradiation from the vertical direction between the first roller portion and the second roller portion that suspend the continuous processing medium are formed at an angle of horizontal, right-up, or left-down, By driving at least one of the first roller portion and the second roller portion in the vertical direction, at least one of the first driving means and the second driving means is driven so that the continuous processing medium has a predetermined angle in the laser irradiation portion. When the horizontal state of the position where the distance to the laser irradiation position, which is the minute hole forming position of the continuous processing medium is made constant, is set to the horizontal direction with respect to the first driving means and the second driving means. When generating the movable amount to be in a state and instructing the movable amount to make the state other than the horizontal state, the first roller unit and the second driving unit are connected to the first driving unit and the second driving unit. The driving amount from the horizontal state relative to the horizontal state of the roller portion and configured to command determined in large. That is, by moving at least one of the first roller portion and the second roller portion in the vertical direction, the continuous processing medium can be set to a predetermined angle. It is possible to easily form micropores at a left-down angle.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
Figure 1 shows a schematic diagram of a laser processing system according to the present onset bright. In FIG. 1A, a laser processing system 11 includes a continuous processing medium 12 such as paper or film supported by guide rollers 15 to 20 between a supply unit 13 and a winding unit 14 (may be folded). Suspended. The continuous processing medium 12 is transported between the guide rollers 15 to 20 by the transport means 21 that drives the winding means 14, and when the space between the guide rollers 17 and 18 is a laser processing area, the continuous processing medium 12 is above the area. The laser irradiating means 22 is disposed on the surface.
[0014]
The laser irradiation means 22 forms a predetermined number of minute holes with a predetermined angle with respect to the thickness direction by irradiating the continuous processing medium 12 with laser light, and includes a laser generating mechanism and a scanning mechanism (not shown). Existing systems can be used. The laser generation mechanism generates laser light appropriately selected, such as a CO ₂ laser and a YAG laser, using an existing laser generation mechanism, for example. Also, depending on the type of laser processing, for example, when scanning laser light one-dimensionally, a scanning mechanism such as a polygon mirror scanning mechanism or a one-dimensional moving mechanism of a mirror and a condensing lens component is adopted as a scanning mechanism. A galvano scan mechanism is employed when scanning laser light.
[0015]
The guide rollers 16 and 17 constitute, for example, a first roller portion, and are moved by being moved up and down by the first driving means 23. The guide rollers 18 and 19 constitute, for example, a second roller portion, and are moved by being moved up and down by the second driving means 24. Further, a sensor 25 (for example, a timing mark is attached to each processing region of the continuous processing medium) for obtaining laser irradiation timing is disposed between the guide rollers 16 and 17.
[0016]
The first drive means 23 is configured by a rack gear mechanism including a vertical drive source 31 such as a motor and a vertical guide drive unit 32, and the vertical drive source 31 includes the guide rollers 16 and 17 and the sensor of the first roller unit. 25 is moved up and down on the vertical guide drive unit 32. Similarly, the second drive means 24 is configured by a rack gear mechanism including a vertical movement drive source 32 such as a motor and a vertical guide drive unit 34, and the vertical drive source 32 is the guide of the second roller unit. The rollers 18 and 19 are moved in the vertical direction on the vertical guide driving unit 34.
[0017]
For example, when the minute hole 12A is formed in a direction perpendicular to the thickness direction of the continuous processing medium 12, the guide roller 16 of the first roller portion and the guide roller 18 of the second roller portion are positioned at the same level. Thus, the processing region portion of the continuous processing medium 12 is set in a horizontal state, and as shown in FIG. 1 (B), vertical micro holes 12A are formed by laser irradiation from the laser irradiation means 22. Note that the case where the minute holes 12A are formed at an oblique angle with respect to the thickness direction will be described with reference to FIG. In addition, the first and second driving means 23 and 24 may be a mechanical type such as a hydraulic pressure or a ball screw, or an electric type such as a linear actuator.
[0018]
Here, FIG. 2 shows a block diagram of the control processing means for driving and controlling the system. In FIG. 2, the control processing means 41 is connected to an input means 42 for appropriately inputting set machining data, and drives at least the laser irradiation means 22 based on predetermined machining data, and is a continuous machining medium. The angle of the minute hole 12A formed by laser irradiation in the motor 12 is driven by at least one of the first driving means 23 and the second driving means 24 to drive the first roller portion (guide rollers 16, 17) and the second roller portion ( Adjustment is made by moving at least one of the guide rollers 18, 19). For this purpose, a control means 51, a bus 52, an interface (IF) 53, a drive amount calculation processing means 54, a machining data file creation means 55, a laser irradiation control means 56, a vertical drive control model 57, and a conveyance control means 58 are provided as appropriate. .
[0019]
The control means 51 controls the drive control of this system and stores a program for this purpose. The IF 53 is for ensuring consistency in signal exchange with the conveying means 21, the laser irradiation means 22, the first and second driving means 23 and 24, and the sensor 25. The driving amount calculation processing means 54 will be described in detail with reference to FIGS. 4 to 6, but based on the set machining data input from the input means 21, the microholes formed in the continuous processing medium 12 by laser irradiation. In order to set 12A as the angle of the processing data, at least one of the first drive means 23 and the second drive means 24 is driven to drive the first roller portion (rollers 16, 17) and the second roller portion (rollers 18, 19) A drive amount for moving at least one of the above is calculated. Here, it demonstrates as what moves both a 1st roller part and a 2nd roller part.
[0020]
The machining data file creation means 55 creates a machining data file based on the set machining data such as the machining position input from the input means 42. The laser irradiation control means 56 sends processing data such as a laser irradiation position, irradiation timing, and laser power to the laser irradiation means 15 based on the created processing data file. The vertical movement drive control means 57 is driven according to the drive amount (movable amount of the guide rollers 17 and 18) to the first and second drive means 23 and 24 calculated by the drive amount calculation processing means 54. Generate and output a control signal. The transport processing unit 58 generates a drive control signal for transporting the continuous processing medium 12 at a predetermined transport speed, for example, and outputs the drive control signal to the transport unit 21.
[0021]
Here, FIG. 3 shows an explanatory diagram of the principle of laser processing by this system. FIG. 3A shows a case where the microhole 12A is formed in the continuous processing medium 12 at a predetermined angle (for example, 45 degrees) inclined downward to the right in the drawing. As shown in FIG. When the medium 12 is in a horizontal state, the direction of laser irradiation at this time is fixed in the thickness direction of the continuous processing medium 12.
[0022]
That is, the guide rollers 16 and 17 (including the sensor 25) are raised on the vertical guide drive unit 32 by the vertical drive source 31 of the first drive unit 23, and the vertical guide drive unit 33 is driven by the vertical drive source 33 of the second drive unit 24. By lowering the guide rollers 18 and 19 on 34, the processing area of the continuous processing medium 12 is lowered 45 degrees to the right in the drawing. In this state, when the laser irradiation unit 22 performs laser irradiation to form the microhole 12A, the continuous processing medium 12 is formed at an angle of 45 degrees downward to the right in the drawing with respect to the thickness direction. It becomes.
[0023]
FIG. 3B shows a case where the minute holes 12A are formed in the continuous processing medium 12 at a predetermined angle (for example, 45 degrees) with a leftward downward slope in the drawing. The guide rollers 16 and 17 (including the sensor 25) are lowered on the vertical guide drive unit 32 by 31 and the guide rollers 18 and 19 are raised on the vertical guide drive unit 34 by the vertical drive source 33 of the second drive means 24. Thus, the processing area of the continuous processing medium 12 is set to 45 degrees to the lower left in the drawing. Similarly, when the laser irradiation unit 22 performs laser irradiation in this state to form the microhole 12A, the continuous processing medium 12 is formed at an angle of 45 degrees downward to the left in the drawing with respect to the thickness direction. It will be.
[0024]
FIG. 4 to FIG. 6 are diagrams illustrating the principle of the movable amount calculation in the control processing unit of FIG. In FIG. 4A, for example, when forming the micro hole 12A inclined downward to the right (for example, 45 degrees) in the continuous processing medium 12, the first roller portion (the guide roller 17 or the like) without changing the laser irradiation position P. Is raised by a movable amount D1, and the second roller part (guide roller 18 or the like) is lowered by a movable amount D2. That is, when the first and second roller parts (guide rollers 17, 18 and the like) are both moved in order to make the continuous processing medium 12 have a predetermined angle with the laser irradiation position kept constant, The amount of descent movement will inevitably differ.
[0025]
For example, as shown in FIG. 4B, when the movable amount of ascending and descending is the same (D1), the actual laser irradiation position becomes P0, and the laser irradiation position P shown in FIG. It will be higher. This is because the continuous processing medium 12 is wound around the guide rollers 17 and 18. Thus, when the laser irradiation position is P0, the focal length must be adjusted by the laser irradiation means 22 each time, and delicate adjustment and maintenance are required, resulting in a complicated and increased number of components.
[0026]
For this purpose, as shown in FIG. 4A, the movable amount (D1) of the first and second roller portions (guide rollers 17, 18, etc.) is movable differently from the movable amount (D2) of descending. By doing so, the laser irradiation position P is made constant, and the existing laser irradiation means 22 or a laser irradiation means using a condensing lens with a short focal length can be used.
[0027]
Therefore, the movable amounts D1 and D2 of the first and second roller portions (guide rollers 17, 18 and the like) are calculated by the drive amount calculation processing means 54 of the control processing means 41 as shown in FIGS. It is. That is, in FIG. 5A, first, the laser irradiation position P is known between the horizontal guide rollers 17 and 18, and the horizontal distance L from the one guide roller 17 (18) to the laser irradiation position P is To do. Further, by setting the guide rollers 17 and 18 to have the same diameter (radius R), the ascending movable amount is made X amount smaller than the virtual movable amount D0, and the descending movable amount is made larger than the virtual movable amount D0 by X amount. Can be universal.
[0028]
FIG. 5B shows the calculation of the ascending movable amount, and the inclination angle θ of the minute hole 12A is determined by the inputted set processing data. That is, as shown in FIG. 5B, the movable amount D1 of the rise is
D1 = D0-X (1)
It is represented by Therefore, in FIG. 5B, D0 and X can be obtained by the following equations.
a = Rsinθ (2)
b = atanθ (3)
c = R−R cos θ (4)
X = bc (5)
D0 = Ltanθ (6)
[0029]
Further, the downward movable amount D2 is as shown in FIG.
D2 = D0 + X (7)
In FIG. 6, D0 and X can be obtained by the same formulas as the formulas (2) to (6).
[0030]
5 and 6 have been described with reference to FIG. 3A, but the first roller portion (guide roller 17 and the like) is lowered as shown in FIG. Even when the roller 18 or the like is raised, the calculation of the movable amount of ascent and the calculation of the movable amount of descending can be obtained by the above equations.
[0031]
FIG. 7 shows a flowchart of laser processing by this system. Here, with respect to the thickness direction of the continuous processing medium 12, three kinds of micro holes 12 </ b> A in a vertical direction (90 degrees) as shown in FIG. An explanation will be given of the case where the films are sequentially formed while returning. Therefore, although not shown in FIG. 1, a sensor for detecting a timing mark is further provided between the guide rollers 18 and 19. Moreover, the supply means 13 and the winding means 14 in FIG. 1 are reversely rotated at the time of rewinding, and a conveying means for conveying to the winding side is provided. Alternatively, the continuous processing medium 12 wound by the winding means 14 after forming the microholes 12A of a predetermined angle with the system 11 of FIG.
[0032]
In FIG. 7, first, machining data for forming the vertical minute holes 12A is extracted based on a machining data file created from input set machining data, and the guide rollers 17 and 18 are moved horizontally. The vertical drive control means 57 generates an amount of drive control signal and outputs the drive control signal to the first and second drive means 23 and 24 to achieve the horizontal state shown in FIG. 1 (step (S) 1).
[0033]
When the sensor 25 detects the timing mark attached to the continuous processing medium 12 to be conveyed, the laser irradiation control means 56 sends a laser processing control signal to the laser irradiation means 22 for driving based on the processing data file after a predetermined time. Thus, the vertical micro holes 12A are sequentially formed (S2). For example, the vertical micro holes 12A are formed in all the processing regions of the continuous processing medium 12 conveyed from the supply source 13.
[0034]
When all the micro holes 12A in the vertical direction are formed (S3), the machining data for forming the micro holes 12A inclined downward to the right (for example, θ = 45) is extracted based on the created machining data file. The movable amount D1 for raising the first roller portion (guide roller 17) according to the angle is calculated by the above equation (1), and the second roller portion (guide roller 18 or the like) is calculated according to the angle. The movable amount D2 to be lowered is calculated by the above equation (7), and the vertical drive control means 57 generates a drive control signal in accordance with the movable amounts D1 and D2 to the first and second drive means 23 and 24. By outputting, the state shown in FIG. 3A is obtained, and the paper is rewound and conveyed by a conveying means (not shown) (S4).
[0035]
When a sensor (not shown) (a sensor provided on the guide roller 18 side) detects a timing mark attached to the continuous processing medium 12, a laser processing control signal is sent from the laser irradiation control means 56 based on the processing data file after a predetermined time. Are sent to the laser irradiating means 22 and driven to form slanting micro holes 12A that are inclined downward to the right (S5). Then, rightwardly slanting micro holes 12A are formed in all processing regions of the continuous processing medium 12 to be conveyed.
[0036]
Subsequently, when all the right-sloped minute holes 12A are formed (S6), the machining data for forming the left-slanted (eg, θ = 45) minute holes 12A based on the created machining data file. And a movable amount D2 for lowering the first roller portion (guide roller 17) according to the angle is calculated by the equation (7), and the second roller portion (guide roller 18 and the like) The movable amount D1 to be raised according to the angle is calculated by the above equation (1), and the vertical drive control means 57 generates a drive control signal according to the movable amounts D1 and D2 to generate the first and second drive means. By outputting to 23 and 24, the state of FIG. 3B is obtained (S7).
[0037]
When the sensor 25 detects the timing mark attached to the continuous processing medium 12 being conveyed, the laser irradiation control means 56 sends a laser processing control signal to the laser irradiation means 22 for driving based on the processing data file after a predetermined time. By doing so, slanted micro holes 12A are formed sequentially (S8). Then, a slanting leftward minute hole 12A is formed in all the processing regions of the continuous processing medium 12 to be conveyed (S9).
[0038]
In the above embodiment, when the continuous processing medium 12 is inclined, both the first roller portion (guide roller 17 and the like) and the second roller portion (guide roller portion 18 and the like) are moved in the vertical direction. However, the same is true if either one is moved, and the amount of movement is calculated accordingly.
[0039]
In this way, by moving at least one of the first roller part (guide roller 17 and the like) and the second roller part (guide roller part 18 and the like), the continuous processing medium 12 can be set to a predetermined angle, and the laser Without changing the internal configuration or the like of the irradiation means 22, the micro holes 12A can be easily formed at a predetermined angle with respect to the continuous processing medium 12 with a simple configuration.
[0050]
【The invention's effect】
As described above, according to the present invention, a predetermined number of micro holes formed by laser irradiation from the vertical direction between the first roller portion and the second roller portion for suspending the continuous processing medium are horizontally, right-up, or left-down angles. The first drive unit and the second drive unit are configured to move the at least one of the first roller unit and the second roller unit in the vertical direction so that the continuous processing medium has a predetermined angle in the laser irradiation portion. In order to drive at least one of the means and to make the horizontal state at a position where the distance to the laser irradiation position, which is the microhole formation position of the continuous processing medium, is constant , the first drive means, the second drive means, When generating a movable amount for causing the driving unit to be in the horizontal state and instructing the movable amount to be other than the horizontal state, the first driving unit and the second driving unit are The horizontal state of the roller portion and the second roller portion relative to the driving amount from the horizontal state by a configuration in which command determined in large, in the processing region to the configuration simplified relative to the processing surface of the continuous processing medium A predetermined angle can be set, and microscopic holes can be easily formed in a continuous processing medium at an angle of horizontal, right-up, or left-down.
[Brief description of the drawings]
1 is a schematic configuration diagram of a laser processing system according to the present onset bright.
FIG. 2 is a block configuration diagram of control processing means for driving and controlling the system.
FIG. 3 is an explanatory diagram of the principle of laser processing by this system.
4 is a principle explanatory diagram (1) of a movable amount calculation in the control processing means of FIG. 2; FIG.
FIG. 5 is a principle explanatory diagram (2) of a movable amount calculation in the control processing means of FIG. 2;
6 is a principle explanatory diagram (3) of a movable amount calculation in the control processing means of FIG. 2; FIG.
FIG. 7 is a flowchart of laser processing by this system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11,61 Laser processing system 12 Continuous processing medium 13 Supply means 14 Winding means 15-20 Guide roller 21 Conveyance means 22 Laser irradiation means 23 1st drive means 24 2nd drive means 25 Sensor 31, 33 Vertical drive source 32,34 Vertical guide drive unit 41 Control processing means

Claims (1)

A laser processing system for performing processing for irradiating a continuous processing medium to be conveyed to form a predetermined number of minute holes with a predetermined angle with respect to the thickness direction of the continuous processing medium,
First driving means for moving a predetermined number of first roller parts supporting the continuous processing medium to be conveyed in the vertical direction;
A second driving means for moving a predetermined number of second roller parts in a vertical direction to suspend and support the continuous processing medium between the first roller parts;
With respect to the continuous processing medium to be conveyed, the predetermined number of minute holes are disposed on a processing region between the first roller unit and the second roller unit, and the predetermined number of microholes are irradiated by laser irradiation from the vertical direction to the continuous processing medium. Laser irradiation means for forming,
At least one of the first roller unit and the second roller unit is driven by driving at least one of the first driving unit and the second driving unit while driving the laser irradiation unit based on predetermined processing data. Is a laser that adjusts the horizontal, right-up, or left-down angle of the micro-holes formed by laser irradiation on the continuous processing medium by moving the laser in the vertical direction, and is a micro-hole forming position of the continuous processing medium the continuous processing medium focal length in a state of being constant by causing the distance to the irradiation position constant when driving up and down both the first roller portion and the second roller portion in order to with the angle, the When the horizontal position of the position where the focal lengths of the first roller unit and the second roller unit are constant is set to the first driving unit and the second driving unit. When generating the movable amount to be set to the horizontal state and instructing the movable amount to make the movable state other than the horizontal state, the first roller unit and the second roller with respect to the first driving unit and the second driving unit. and control processing means the lowering movable amount from increasing movable amount of driving amount from the horizontal state relative to the horizontal state of the parts you command defines the large,
A laser processing system comprising:

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