JPS63257641A - Printing pattern rotary of laser printer - Google Patents

Abstract

PURPOSE:To enable printing and processing to be executed at a high speed, by a method wherein a plurality of sheets of mirrors are rotated, and a printing pattern given laser beam is rotated. CONSTITUTION:A galvanomirror 23 is rotated with a rotary driving device 25, and an irradiation position of laser beam L radiated horizontally to a materials 22 to be worked from a laser oscillator 1 can be shifted in the X direction. Further, by rotating the galvanomirror 24 with a rotary driving device 26, the irradiation position of laser beam L can be shifted in the Y direction. As a result, cojointly with rotation of a printing pattern 5 with a printing pattern rotary device 6, a plurality of characters can be printed while smoothly being rotated to cut a curved line 27 at right angles along the curved line 27.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a laser printing device that prints a desired print pattern on a workpiece using a laser beam. The present invention relates to a printed pattern rotation device that can irradiate a printed pattern.

``Prior Art'' Conventionally, a laser printing device transmits a laser beam through a mask on which a desired printing pattern has been formed in advance, imparts the desired printing pattern to the laser beam, and irradiates the laser beam onto a workpiece. It is known that the above-mentioned printing pattern is printed on the workpiece by
No. 51048).

[Problem to be solved by the invention] In conventional laser printing devices of this type, when printing the same printing pattern at different rotation angles, for example, when printing in an upright position, it is necessary to rotate the pattern by 45 degrees and 90 degrees. When printing for deaf or deaf people, in addition to the print pattern in the upright position, print patterns rotated by 45 degrees and print patterns rotated by 90 degrees are prepared. It is actually difficult to prepare print patterns with a large number of rotation angles, and increasing the number of print patterns increases the size and cost of the device.

As a means of solving this problem, instead of preparing the same printing pattern with different rotation angles, it is possible to provide the workpiece to be rotatable, but in that case, it is possible to rotate the workpiece. It requires work to supply and discharge the workpiece to the rotational drive means, and the configuration becomes complicated accordingly.
It also hinders speeding up of processing.

"Means for Solving the Problems" In view of such circumstances, the present invention provides the above-mentioned laser printing device, in which the rotating body is aligned with the optical axis of the laser beam from the mask. a first mirror that is rotatably supported and is located on the rotation axis of the rotating body and reflects the laser beam from the mask radially outward; and a laser beam from the first mirror. A second mirror that reflects the laser beam toward the rotational axis, and a third mirror that reflects the laser beam from the second mirror onto or parallel to the rotational axis are provided, and the rotating body is rotated. The printing pattern applied to the laser beam is rotated by rotating the plurality of mirrors.

"Operation" According to the above configuration, the printing pattern applied to the laser beam can be rotated simply by rotating the rotating body, so there is no need to prepare a large number of masks with different angles, and moreover, it is not necessary to prepare a large number of masks with different angles. There is no need to rotate the workpiece, so it can be manufactured at low cost and the processing speed can be increased.

``Embodiment'' The present invention will be described below with reference to an illustrated embodiment. In FIG. 1, a mask switching device 2 is provided on the optical axis of a laser beam emitted horizontally from a laser oscillator 1, Any one of the many masks provided in the device 2
By selectively transmitting the laser beam, the desired printing pattern formed on the mask can be applied to the laser beam.

In the illustrated embodiment, the mask switching device 2 includes one disk 3.
and a motor 4 that continuously rotates the disk 3, and a large number of masks are sequentially formed along the circumferential direction of the outer circumference of the disk 3. It is formed by punching out a shaped printed pattern 5.

Then, the motor 4 continuously rotates the disk 3, and upon receiving a signal from a sensor (not shown) that detects the rotation angle position, the moment when a predetermined printing pattern 5 to be printed is positioned on the optical axis of the laser beam. The above laser oscillator 1
By emitting a laser beam from the laser beam, the predetermined printing pattern 5 can be applied to the laser beam.

On the downstream side of the mask switching device 2, there is provided a print pattern rotation device 6 according to the present invention that rotates the print pattern 5 provided by the mask. As shown in FIG. 2, this printed pattern rotating device 6 includes a cylindrical rotating body 9 that is rotatably supported on a support frame 7 via a bearing 8, and the rotational axis of this rotating body 9 is The line O is made to coincide with the optical axis of the laser beam from the mass switching device 2.

There are three mirrors 1O111, 12 inside the rotating body 9.
The first mirror 10 is located on the rotation axis O and directs the laser beam from the mask switching device 2 toward the second mirror 11 attached to the inner peripheral surface of the rotating body 9 in the radial direction. It is designed to reflect outward diagonally. Further, the second mirror 11 is configured to reflect the laser beam from the first mirror 10 again toward the rotation axis 0, and the third mirror I2 is configured to reflect the laser beam from the second mirror 11 again. The beam is reflected onto the rotational axis 0.

Furthermore, a gear 13 is attached to the outer periphery of the rotating body 9, and a pinion 14 meshed with the gear 13 is interlocked with a stepping motor or a servo motor 15. Note that a timing belt and a pulley may be used instead of the gear 13 and pinion 14.

Therefore, according to the printing pattern rotating device 6 having such a configuration, if the rotating body 9 is rotated by the servo motor 15 via the pinion 14 and the gear 13, the rotating body 9 can be rotated.
The three mirrors 10, 11, and 12 can be rotated integrally around the rotation axis 0 as the mirrors rotate, and the mask switching device 2 can rotate the mirrors 10, 11, and 12 integrally around the rotation axis 0, and the mask switching device 2 can rotate the mirrors 10, 11, and Print pattern 5 applied to the laser beam
can be rotated.

Next, the laser beam that has passed through the printing pattern rotation device 6 is focused by a focus lens 20, and at the same time, is irradiated to a predetermined position on the workpiece 22 by the laser beam irradiation position control means 21. The above printing pattern 5 is printed on the object 22.

The irradiation position control means 21 includes two galvano mirrors 23.
.
The second galvano mirror 24 reflects the horizontal laser beam from the first galvano mirror 23 at right angles to the vertical direction, and the second galvano mirror 24 reflects the laser beam from the first galvano mirror 23 at right angles to the vertical direction. The workpiece 22 is irradiated with the radiation.

The first galvano mirror 23 is configured such that the laser beam from the printed pattern rotation device 6 is applied to the first galvano mirror 23.
The second galvano mirror 24 is rotated by a rotary drive device 25 about a vertical axis passing through a reflection point 23a reflected by the second galvano mirror 24. It is configured to be rotated by a rotary drive device 26 about a horizontal axis that passes through a reflection point 24a and is parallel to the laser beam from the print pattern rotation device 6.

Therefore, by rotating the first galvano mirror 23 with the rotation drive device 25, the irradiation position of the laser beam on the workpiece 22 can be moved in the X direction shown in FIG. -24 by the rotary drive device 26, the irradiation position of the laser beam can be moved in the Y direction orthogonal to the X direction. As a result, in conjunction with the rotation of the print pattern 5 by the print pattern rotation device 6, as shown in FIG. can do.

In the above embodiment, the second mirror 11 is made up of one mirror, but it is not necessarily limited to the shape of the mirror, and as long as the printed pattern 5 can be rotated with the rotation of the rotating body 9. A large number of second mirrors 11 may be provided at appropriate positions on the rotating body 9.

Further, in the above embodiment, the laser beam from the second mirror 11 is reflected by the third mirror 12 onto the rotation axis center line 0, but it does not necessarily have to be on the rotation axis center line, and the laser beam is rotated more than necessary. The light may be reflected parallel to the axis O within a range not far from it.

Further, the four-power winter lens 20 may be disposed between the first galvano mirror 23 and the second galvano mirror 24 or between the second galvano mirror 24 and the workpiece 22.

"Effects of the Invention" As described above, according to the present invention, the printing pattern applied to the laser beam can be rotated simply by rotating the rotating body provided with a plurality of mirrors, so that the printing pattern can be rotated at different angles. Since there is no need to prepare a large number of masks, and there is no need to rotate the workpiece, it is possible to manufacture the product at low cost and to speed up the printing process.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
FIG. 3 is a cross-sectional view of the main part of the figure, and a plan view showing an example of printing. 1... Laser oscillator 2... Mask switching device 3...
・Disk 4...Motor 5...Print pattern 6...Print pattern rotation device 9...Rotating body
IO...first mirror 11...second mirror 13
...Third mirror 15...Surho motor 20...
Focus lens 21...irradiation position control means 22.
...Workpiece Figure 2 Figure 3

Claims (1)

[Claims] A laser beam is passed through a mask on which a desired printing pattern has been formed in advance to impart a desired printing pattern to the laser beam, and a workpiece is irradiated with this laser beam. In the laser printing device for printing the above-mentioned printing pattern, a rotary body is rotatably supported with its rotation center line aligned with the optical axis of the laser beam from the mask, and the rotation axis a first mirror that is located on the line and reflects the laser beam from the mask radially outward; a second mirror that reflects the laser beam from the first mirror toward the rotation axis; Furthermore, a third mirror is provided to reflect the laser beam from the second mirror onto or parallel to the rotation axis, and the plurality of mirrors are rotated by the rotation of the rotating body, and the laser beam is applied to the laser beam. A print pattern rotation device for a laser printing device, which is characterized by rotating a print pattern.