JP2511375B2 - Laser marking device and optical scanner mounting method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scanning type laser marking apparatus.

[0002]

2. Description of the Related Art In laser marking, an object to be processed (object) is irradiated with laser light focused at a high density, and a minute portion of the surface of the object is instantaneously evaporated or discolored by laser energy. This is a marking method for engraving an arbitrary pattern such as characters and figures. Laser marking methods include a mask method in which laser light is applied to a mask in which patterns such as letters and symbols are die-cut, and the transmitted light image is focused on the surface of the work piece, and laser light on the work piece is focused. There is a scanning method which scans and draws a pattern of characters, symbols, etc. on the surface of a workpiece.

A scanning type laser marking apparatus has a laser oscillating section for oscillating and outputting a laser beam, and a laser emitting section for converging and irradiating a workpiece while scanning the laser beam. The laser emitting part is an X-axis rotating mirror, Y
It is mainly composed of an axis rotating mirror, an X-axis optical scanner, a Y-axis optical scanner and an fθ lens.

The laser light coming from the laser oscillating section first enters one mirror, for example, an X-axis rotating mirror, is totally reflected there, and then enters the other mirror (Y-axis rotating mirror), and this mirror totally reflects the laser beam. After being reflected, it passes through the fθ lens and is focused and irradiated onto the marking surface of the workpiece. The position of the laser beam spot on the marking surface is determined by the angle of the X-axis rotating mirror in the X direction and by the angle of the Y-axis rotating mirror in the Y direction. The X-axis rotating mirror is rotationally driven by the X-axis optical scanner, and the Y-axis rotating mirror is rotationally driven by the Y-axis optical scanner. A scanning control signal for instructing an angle to swing both mirrors is given to both scanners from the control unit.

Therefore, each time the laser light from the laser oscillator enters at a predetermined timing, both scanners oscillate the X-axis rotary mirror and the Y-axis rotary mirror at a predetermined angle in synchronism with the laser light. A beam spot of laser light is focused and irradiated on the marking surface of the workpiece. Then, in the vicinity of the irradiation position of the laser light, the surface of the workpiece is locally heated by the laser energy and evaporated.
When the laser beam spot is scanned so that the vaporized portion draws a desired pattern, the drawing pattern (characters, symbols, figures, etc.) is marked on the marking surface of the workpiece.

[0006]

In the scanning type laser marking apparatus, even if one of the rotation center axes of the X-axis rotary mirror and the Y-axis rotary mirror is deviated or tilted from the optical axis of the laser beam, both scanners are scanned. The laser beam spot is displaced or distorted on the surface of the workpiece even if the laser beam accurately operates according to the scanning control signal from the controller (even if each mirror is shaken at the correct timing and the correct amplitude). Therefore, the desired pattern is not drawn. Therefore, both the X-axis rotating mirror and the Y-axis rotating mirror or both the X-axis optical scanner and the Y-axis optical scanner need to be placed in the correct position and orientation, respectively.

In this type of conventional laser marking device,
An alignment mechanism for adjusting the position and inclination of each optical scanner or each rotating mirror with respect to the optical axis of the laser light is provided in the laser emitting section. However, by providing such an alignment mechanism, the laser emitting part becomes bulky and heavy, and it is difficult to configure a swing-type laser emitting part in which the direction of the laser emitting port can be changed. Further, the apparatus cost is inevitably high, and the alignment adjustment work is troublesome.

In addition, the laser emitting section is generally housed in a housing, and has a unit structure in which it is difficult for external dust or dirt to enter the housing. However, since it is a unit that handles laser light for many minutes, it is necessary to prevent dust from adhering to the optical system such as the X-axis rotating mirror and the Y-axis rotating mirror. Conventionally, in order to protect the optical system in the laser emitting portion from dust, the optical path of the laser light is covered with a cylindrical cover. However, this optical path cover has also been a cause of increasing the size of the laser emitting portion.

The present invention has been made in view of the above problems, and enables the laser scanning section and the optical scanner in the laser emitting section to be arranged in the correct positions and in the correct directions without requiring a special alignment mechanism. An object of the present invention is to provide a laser marking device.

Another object of the present invention is to provide a laser marking device which protects the optical system in the laser emitting portion from dust without the need for an optical path cover.

Another object of the present invention is to provide a laser marking device having a small and light laser emitting portion.

Still another object of the present invention is to use an optical / optical device in a laser emitting section by using a simple member and a simple jig.
An object of the present invention is to provide an optical scanner mounting method capable of mounting or arranging a scanner and a laser scanning unit at correct positions and in correct orientations.

[0013]

In order to achieve the above object, the first laser marking apparatus of the present invention is a laser scanning device comprising an X-axis rotating mirror and a Y-axis rotating mirror which rotate about axes orthogonal to each other. Section, an X-axis optical scanner that rotationally drives the X-axis rotating mirror, and a Y-axis optical scanner that rotationally drives the Y-axis rotating mirror,
A chamber-type optical scanner mounting body in which the X-axis optical scanner and the Y-axis optical scanner are mounted and fixed in a state where the laser scanning unit is housed in a room. The X is placed at a predetermined position on two wall surfaces that are orthogonal to each other.
Axial optical scanners and openings for passing the rotation drive shafts of the Y-axis optical scanner are provided respectively, and the X-axis is provided through a mounting member that can be positioned in the openings.
The axial optical scanner and the Y-axis optical scanner are attached and fixed to the optical scanner attachment body, respectively. The second aspect of the present invention
In the laser marking device, the laser scanning unit including an X-axis rotating mirror and a Y-axis rotating mirror that rotate in mutually orthogonal axes, an X-axis optical scanner that rotationally drives the X-axis rotating mirror, and the Y-axis rotating mirror. A Y-axis optical scanner that rotates a mirror, and the X-axis optical scanner and the Y-axis optical scanner are mounted and fixed in a state where the laser scanning unit is housed in a room. A first wall surface provided with a first opening for allowing light to pass through the laser scanning portion inside the room, and a second opening for outputting the laser light reflected by the laser scanning portion to the outdoor optical lens side. A chamber type optical scanner mounting body having a provided second wall surface, and a laser light inlet for entering the laser light from the laser oscillation unit into a room Said the laser light Optical
With a laser light outlet for outputting to the scanner mounting body side,
A laser light guide chamber that is fitted and integrally coupled to the optical scanner mounting body, and one or more laser light reflection mirrors fixedly arranged at a predetermined position in the laser light guide chamber in a predetermined direction. It is configured to be equipped.

In order to achieve the above object, the optical scanner mounting method according to the present invention allows the mirror rotation drive shaft of the optical scanner to pass through the optical scanner mounting position of the chamber type optical scanner mounting body. The opening is provided, and a mounting member having a positioning flange portion that can be fitted into the opening is aligned with the mounting surface of the optical scanner, and a hole that can be inserted into the mirror rotation drive shaft and the flange portion are provided. The mounting member is aligned with the mirror rotation drive shaft by using a jig having an outer peripheral surface that can be removably fitted, and is mounted and fixed to the mounting surface of the optical scanner, and then the flange of the mounting member. A part is fitted in the opening, and the mounting member is mounted and fixed to the optical scanner mounting body.

[0015]

In the first laser marking apparatus of the present invention, the chamber-type optical scanner mounting body is provided with a laser scanning portion composed of an X-axis rotating mirror and a Y-axis rotating mirror, and the scanner mounting body is housed in the chamber. The rotation drive shafts of the X-axis optical scanner and the Y-axis optical scanner are passed through the openings provided at the predetermined positions on the two wall surfaces that are orthogonal to each other, and both scanners are mounted through the mounting members that can be positioned in this opening. Since they are fixed, both scanners are arranged in the correct position and orientation with respect to the scanner mounting body, and the X-axis rotating mirror and the Y-axis rotating mirror that are respectively coupled to the motor rotation drive shafts of both scanners are also arranged in the correct position and orientation. To be done. Therefore, it is not necessary to provide a special alignment mechanism. Further, since the laser scanning section is arranged inside the chamber of the chamber type optical scanner mounting body, it is not necessary to provide an optical path cover inside the laser emitting section. In the second laser marking device of the present invention,
Since the laser light guide chamber is fitted and integrally connected to the optical scanner mounting body, and the laser light reflection mirror is fixedly arranged at a predetermined position in the laser light guide chamber in a predetermined direction, the laser light reflection mirror is arranged around the laser light reflection mirror. There is no need to provide a special alignment mechanism or optical path cover.

According to the optical scanner mounting method of the present invention, there is provided a jig having a hole that can be inserted into the mirror rotation drive shaft of the optical scanner and an outer peripheral surface that can be detachably fitted to the flange portion of the mounting member. By using the tool, the attachment member can be accurately aligned (centered) with respect to the mirror rotation drive shaft and attached and fixed to the optical scanner. Then, by fitting the flange part of the mounting member into the scanner mounting opening of the optical scanner mounting body and mounting and fixing the mounting member to the optical scanner mounting body, the optical scanner is correctly positioned on the optical scanner mounting body. The X-axis rotating mirror or the Y-axis rotating mirror, which is fixedly mounted in the optical scanner mounting body and is fixedly mounted in the optical scanner mounting body, is mounted and fixed in the optical scanner mounting body.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view showing the structure of a laser emitting portion of a laser marking device according to an embodiment of the present invention.
FIG. 2 is a perspective view showing an external configuration of a main part in the laser emitting part.

1 and 2, the laser emitting portion in this embodiment is a unit having a housing 10 and is connected to a laser oscillating portion (not shown) via a cylindrical optical path cover 12. . A robust optical component mount 14 made of, for example, aluminum is housed in the housing 10. The optical component mounting body 14 is formed by integrally fitting and coupling a box-shaped chamber type optical scanner mounting body 16 and a box-shaped laser light guide chamber 18.

The X-axis optical scanner 20 and the Y-axis optical scanner 22 are attached to one side surface (left side surface) 16a and upper surface 16b of the optical scanner mounting body 16 in the form of a plate made of an insulating material such as glass epoxy resin. The members 24 and 26 are attached and fixed vertically to the wall surface. The X-axis rotary mirror 30 and the Y-axis rotary mirror 32, which form the laser scanning unit 28 for scanning the laser beam LB, are arranged inside the optical scanner mounting body 16 and are provided outside the outdoor X-axis optical mirror.
The rotary drive shafts of the scanner 20 and the Y-axis optical scanner 22 are respectively coupled.

The other side surface (right side surface) 16c of the optical scanner mounting body 16 is provided with a laser light inlet 34 for passing the laser light LB from the laser light guide chamber 18 into the laser scanning unit 28 in the room. ing. Further, the lower surface 16d of the optical scanner mounting body 16 is provided with a laser light outlet 38 for outputting the laser light LB reflected by the laser scanning unit 28 to the outdoor fθ lens 36 side described later. A female screw for detachably attaching the cylindrical lens holder 40 is formed in the opening 16e on the outer side (lower side) of the laser light outlet 38.

In FIG. 2, the front surface of the optical scanner mounting body 16 is opened almost all over,
The sealing plate 42 is removably attached to the opening with bolts 44. The sealing plate 42 is removed when the laser scanning unit 28 is assembled or repaired.

The laser beam guide chamber 18 has a laser beam inlet 18a for letting in the laser beam LB from the laser oscillator.
And the laser beam LB to the optical scanner mounting body 16
It has a laser beam outlet 18b for emitting it to the side.

As shown in FIG. 3, the laser light guide chamber 18
Is a right-angled surface formed at the outer end of the recess 18c by fitting a right-side surface part 16c of the optical scanner mounting body 16 in a direction perpendicular to the right-side surface of the recess 18c formed around the laser light outlet 18b. The convex portion 18d of the surface is an optical
The right side surface portion 16c of the optical scanner mounting body 16 is fitted with a mechanical accuracy with respect to the right side surface portion 16c of the optical scanner mounting body 16 by fitting the right side surface portion 16c of the scanner mounting body 16 in a direction perpendicular to the recess 16f of the right angle surface. Combined at right angles. A bolt (not shown) or the like may be used to fix the laser light guide chamber 18 to the optical scanner mounting body 16.

As shown in FIG. 1, at the laser light inlet 18a of the laser light guide chamber 18, an annular flange portion 12a protruding perpendicularly (parallel to the optical axis) from the end face of the optical path cover 12 is provided.
Is inserted. As a result, the laser light guide chamber 18 is accurately and perpendicularly coupled to the optical path cover 12 with mechanical precision. A bolt (not shown) or the like may be used to fix the optical path cover 12 to the laser light guide chamber 18.

Inside the laser light guide chamber 18, a reflecting mirror 46 is fixedly arranged via a mirror holder 50 and is inclined downward at an angle of 45 ° with respect to the optical axis of the laser light LB from the laser oscillating unit, and is reflected. Laser light L from the mirror 46
A reflection mirror 48 is fixedly arranged via a mirror holder 52 to the left (toward the laser beam outlet 18b) with an inclination of 45 ° with respect to the optical axis of B. The mirror holder 50 constitutes a part of the outer wall of the laser light guide chamber 18.

As described above, the laser light guide chamber 18 is fitted and connected to the optical scanner mounting body 16 at right angles or in parallel at an accurate surface alignment determined by the mechanical accuracy, and the reflection mirrors 46, 48 are arranged in the laser light guide chamber 18. Is fixedly arranged in a predetermined direction with an inclination of 45 °. As a result, the laser light LB that has horizontally passed through the optical path cover 12 from the laser oscillating portion enters the laser light guide chamber 18 through the laser light inlet 18a, and first the optical path is 90 ° by the reflection mirror 46 in the room. It is bent vertically downward, and then the optical path is bent 90 ° horizontally by the reflection mirror 48, and then enters the chamber of the optical scanner mount 16 through the laser light outlet 18b. Therefore, the laser beam LB from the laser oscillating unit does not have its optical axis displaced or tilted when passing through the laser beam guide chamber 18, and the laser scanning unit 28 in the chamber of the optical scanner mounting body 16 has a predetermined optical axis. It is designed to be horizontally incident on the position in the correct direction.

In the laser light guide chamber 18, the outer surface 18 opposite to the reflection mirror 48 when viewed from the laser light outlet 18b.
A television camera such as a CCD camera 54 is attached to e. An annular lens holder 56 and a cylindrical camera support portion 58 are fixed to the opening formed in the outer side surface 18e with bolts (not shown). The lens holder 56 holds an optical lens 62 by a lens holding ring 60. The camera support portion 58 is composed of two cylindrical bodies, and is provided with a screw hole 58b formed in the inner cylindrical body 58 through a slit-shaped hole 58a formed in the outer cylindrical body and long in the longitudinal (optical axis) direction. The bolt 64 is tightened and screwed, so that the CCD camera 54 is attached so as to be movable in the optical axis direction, that is, focusable.

Lower reflection mirror 4 in laser light guide chamber 18
No. 8 has a reflectance of almost 100% with respect to the laser beam LB, but has a considerable transmittance with respect to visible light. When laser marking is performed on the workpiece W, visible light from the workpiece W passes through the fθ lens 36 and the laser scanning unit 28 of the laser emitting portion in the direction opposite to the laser light LB. The light is transmitted (straightened) without being reflected by the lower reflection mirror 48 in the laser light guide chamber 18, passes through the optical lens 62, and forms an image on the image pickup surface of the CCD camera 54. As a result, the surface of the workpiece W appears on the screen of the display (not shown) connected to the CCD camera 54,
The marking status can be monitored. It should be noted that the work W may be irradiated with visible light by an appropriate illumination means so that a bright monitor screen can be obtained.

As described above, in the laser emitting portion of this embodiment, the X-axis optical scanner 20 and the Y-axis optical scanner are mounted on the chamber type optical scanner mounting body 16 via the plate-shaped mounting members 24 and 26. The scanner 22 is mounted and fixed in the correct position and orientation, and the X-axis rotating mirror 30 and the Y-axis rotating mirror 32 are rotatably arranged in the correct position and orientation in the chamber of the optical scanner mounting body 16. Further, a box-shaped laser light guide chamber 18 is integrally fitted and coupled to the optical scanner mounting body 16 with accurate surface alignment due to mechanical precision, and the reflection mirror 46 is tilted at a predetermined position in the laser light guide chamber 18 at a predetermined inclination. , 48 are fixedly arranged. This eliminates the need for an alignment mechanism that requires adjustment work. Further, since the optical path is provided in the optical scanner mounting body 16 and the laser light guide chamber 18, it is not necessary to provide an optical path cover. Therefore, the laser emitting portion is not bulky and is small and lightweight, and it is easy to connect it to a rotation support shaft (not shown) to form a swing type.

FIG. 9 shows the structure of the main part of the laser scanning mechanism in the laser emitting section of this embodiment. The base end portion of the X-axis mirror support member 72 is inserted and fixed to the rotary drive shaft 70 of the X-axis optical scanner 20, and the X-axis rotary mirror 30 is mounted on the flat surface of the middle portion or the front end portion of the X-axis mirror support member 72. Adhesively fixed. Similarly, Y-axis optical
The Y-axis mirror support member 7 is attached to the rotary drive shaft 74 of the scanner 22.
The base end portion of 6 is inserted and fixed, and the Y-axis rotary mirror 32 is adhesively fixed to the flat surface of the intermediate portion or the front end portion of the Y-axis mirror support member 76. As a result, the X-axis rotating mirror 30 is rotationally driven by the X-axis optical scanner 20,
The axis rotation mirror 32 is rotationally driven by the Y-axis optical scanner 22. A scanning control signal for instructing an angle to swing both mirrors 30 and 32 is given to both scanners 20 and 22 from a control unit (not shown) via a cable (not shown).

The laser light LB entering from the laser light guide chamber 18 first enters the Y-axis rotating mirror 32, undergoes total reflection there, and then enters the X-axis rotating mirror 30, and is totally reflected by this mirror 30. Then, the marking surface of the workpiece W is focused and irradiated through the fθ lens 36. The position of the laser beam spot on the marking surface is determined by the angle of the X-axis rotating mirror in the X direction and Y in the Y direction.
It depends on the angle of the axis rotation mirror. Therefore, each time the laser light from the laser oscillating unit enters at a predetermined timing, both scanners 20 and 22 shake the X-axis rotary mirror 30 and the Y-axis rotary mirror 32 at a predetermined angle in synchronization with the laser light. The beam spot of the laser beam LB is focused and irradiated on the position to be engraved on the workpiece W.

In such a laser scanning mechanism, in order to accurately draw a desired pattern on the workpiece W, both the X-axis rotary mirror 30 and the Y-axis rotary mirror 32 or the X-axis optical scanners 20 and Y are used. Both of the axial optical scanners 22 must each be placed in the correct position and orientation.

In this embodiment, the X-axis optical scanner 2 is mounted by the optical scanner mounting method described later.
The 0 and Y-axis optical scanners 22 are mounted and fixed to the optical scanner mount 16 in the correct positions and orientations, respectively.
In the room, the X-axis rotating mirror 30 and the Y-axis rotating mirror 32
Are rotatably arranged in respective correct positions and orientations.

Next, an optical scanner mounting method according to this embodiment will be described with reference to FIGS. Note that the X-axis optical scanner 20 and the Y-axis optical scanner 22 may have the same configuration, and the X-axis rotating mirror 30 and the Y-axis rotating mirror 32 are mirrors of the same form even though there are some differences in size. Therefore, only the mounting / arrangement of the X-axis optical scanner 20 and the X-axis rotating mirror 30 will be described. The Y-axis optical scanner 22 and the Y-axis rotating mirror 32 are similarly attached and arranged.

In FIG. 4, the rotary drive shaft 70 is perpendicular to the center of the mounting surface of the X-axis optical scanner 20 and is perpendicular to the surface.
Are projected, and screw holes 20a are formed at the four corners of the mounting surface. A circular opening 24a corresponding to a scanner mounting opening 16g of the optical scanner mounting body 16 described later is provided at the center of the mounting member 24, and the peripheral edge of the opening 24a contacts the X-axis optical scanner 20. An annular flange 24b is projected from the surface opposite to the surface. The mounting member 24 has a size that protrudes from the mounting surface of the X-axis optical scanner 20 at least in the longitudinal direction, and has bolt through holes 24d formed at both protruding ends, and the X-axis optical scanner. A bolt through hole 24c is also formed at a position corresponding to the screw hole 20a of 20.

In the present embodiment, in order to mount and fix the X-axis optical scanner 20 on the optical scanner mounting body 16, first, the mounting member 24 is mounted and fixed on the mounting surface of the X-axis optical scanner 20. This mounting member 2
The jig 80 is used for mounting and fixing the No. 4 jig. This jig 8
0 is made of any rigid material such as resin or metal, and has a circular outer peripheral surface 80b that can be removably fitted to the through hole 80a that can be inserted into the rotary drive shaft 70 and the flange portion 24b of the mounting member 24. And have.

As shown in FIG. 5, the opening 2 of the mounting member 24
The mounting member 24 is aligned with the mounting surface of the X-axis optical scanner 20 by passing the rotary drive shaft 70 through the 4a, and the rotary drive shaft 70 is inserted into the through hole 80a of the jig 80 to fix the outer peripheral surface 80b of the jig 80. Flange portion 24 of mounting member 24
Insert into b. In this state, attach the bolt 80 to the mounting member 24.
Through the hole 24c of the X-axis optical scanner 20 and screwed into the screw hole 20a of the mounting surface of the X-axis optical scanner 20 to be fastened and fixed. After fixing the bolts 80 in all the screw holes 20a, the jig 80
Pull out. As a result, the X-axis optical scanner 2
An assembly of 0 and mounting member 24 is obtained. In this assembly, the rotary drive shaft 7 is located at the center position of the flange portion 24b.
0 is accurately positioned (centered).

Next, as shown in FIG. 6, the flange portion 24b of the mounting member 24 has a scanner mounting opening on the left side surface 16a.
The assembly of the X-axis optical scanner 20 and the mounting member 24 is arranged on the optical scanner mounting body 16 so as to be fitted to 16 g . By accurately positioning the flange portion 24b with respect to the scanner mounting opening 16g, the rotary drive shaft 70 is also accurately positioned (centered). Scanner mounting opening 1
Around the 6g, a screw hole 16h is provided at a position corresponding to the hole 24d of the mounting member 24. These screw holes 1
By screwing the bolt 84 through the hole 24d in 6h ,
The X-axis optical scanner 20 is mounted and fixed to the optical scanner mounting body 16 via the mounting member 24. The X-axis rotating mirror 30 has a centered rotating shaft 70.
Since it is mounted and fixed to the optical scanner mounting member 16 via the mirror support member 72, the optical scanner mounting body 16 is arranged at a predetermined position in the room in a predetermined direction.

As described above, according to the optical scanner mounting method of the present embodiment, the mounting having the positioning flange portion 24b that can be fitted into the scanner mounting opening 16g of the left side surface 16a of the optical scanner mounting body 16. Aligning the member 24 with the mounting surface of the X-axis optical scanner 20, a jig 80 having a hole 80a that can be inserted into the rotary drive shaft 70 and an outer peripheral surface that can be detachably fitted into the flange portion 24b is provided. The mounting member 24 is used to rotate the drive shaft 7
It is aligned (centered) with 0 and is fixedly mounted on the mounting surface of the X-axis optical scanner 20, and then the mounting member 24.
The flange portion 24b of the optical scanner mounting body 1 is fitted to the scanner mounting opening 16g to attach the mounting member 24 to the optical scanner mounting body 1.
Attach and fix to 6.

As a result, the rotary drive shaft 70 of the X-axis optical scanner 20 is accurately positioned (centered) in the scanner mounting opening 16g of the optical scanner mounting body 16, and the X-axis rotary mirror 30 is rotated. The scanner mount 16 is rotatably disposed in the room in the correct position and orientation.

Similarly, the rotary drive shaft 74 of the Y-axis optical scanner 22 is accurately positioned (centered) in the scanner mounting opening 16g of the upper surface 16b of the optical scanner mounting body 16, and the Y-axis rotating mirror is used. 32 is rotatably disposed within the optical scanner mount 16 in the correct position and orientation.

The jig 80 used in the optical scanner mounting method of the present invention is not limited to the cylindrical body described above, but a hole 80a and a mounting member which can be inserted into the mirror rotation drive shaft of the optical scanner. Any jig can be used as long as it has an outer peripheral surface or an inner peripheral surface that can be detachably fitted to the flange portion of the.

For example, as shown in FIGS. 7A and 7B, the fitting portion 80a and the grip portion 80a (80c) may have different diameters or shapes. In addition, in FIG.
In the configuration example of (B), the fitting portion 80a is formed in a taper shape in the axial direction to facilitate insertion and removal with respect to the flange portion.

FIG. 8 is a sectional view showing the internal construction of the laser emitting section according to the second embodiment. In this embodiment, the CCD
Since the camera is not attached, the laser light guide chamber 18 is not provided, and the optical path cover 12 ′ from the laser oscillation unit (not shown) is directly connected to the chamber type optical scanner attachment body 16. The lens holder 40 ′ is removably attached to the optical scanner attachment 16 via a spacer 90 at an opening on the laser light outlet 38 side through a spacer 90.

Also in this embodiment, the X-axis optical scanner 20 and the Y-axis optical scanner 22 are provided.
Are fixed to the optical scanner mounting body 16 at correct positions and orientations, respectively, and the X-axis rotating mirror 30 and the Y-axis rotating mirror 32 are rotatably arranged at correct positions and orientations inside the optical scanner mounting body 16. It

Further, it is not necessary to provide an alignment mechanism or an optical path cover inside the laser emitting section, and the laser emitting section can be made compact and lightweight.

[0048]

As described above, according to the first laser marking apparatus of the present invention, the laser scanning unit including the X-axis rotating mirror and the Y-axis rotating mirror is provided in the chamber of the chamber type optical scanner mounting body. In the housed state,
Since the X-axis optical scanner and the Y-axis optical scanner are configured to be attached and fixed to the scanner mounting body in correct positions and directions, no special alignment mechanism or optical path cover is required in the laser emitting section, and the laser emitting section is not required. Can be lightweight and compact. Further, according to the second laser marking apparatus of the present invention, the laser light guide chamber is fitted into the optical scanner mounting body and integrally coupled, and the laser light reflecting mirror is installed at a predetermined position in the laser light guide chamber in a predetermined direction. With the fixed arrangement,
It is not necessary to provide a special alignment mechanism or optical path cover around the laser light reflecting mirror, and the laser emitting portion can be made light and small. Further, according to the optical scanner mounting method of the present invention, the optical scanner and the laser scanning unit are mounted in the correct positions and in the correct directions in the laser emitting section only by using a simple optical scanner mounting body, a mounting member and a jig. Or it can be arranged.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a laser emitting portion of a laser marking device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an external configuration of a main part of a laser emitting section of FIG.

3 is a partial perspective view showing a configuration of a fitting portion between an optical scanner mounting body and a laser light guide chamber of the laser emitting portion of FIG.

FIG. 4 is an exploded perspective view illustrating an optical scanner mounting method according to an embodiment.

FIG. 5 is a perspective view for explaining a method of mounting the optical scanner according to the embodiment.

FIG. 6 is a partial cross-sectional view for explaining an optical scanner mounting method according to an embodiment.

FIG. 7 is a perspective view showing a modified example of a jig used in the optical scanner mounting method of the embodiment.

FIG. 8 is a cross-sectional view showing a configuration of a laser emitting portion of a laser marking device according to a second embodiment.

FIG. 9 is a perspective view showing a configuration of a laser scanning mechanism in the example.

[Explanation of symbols]

 10 Housing 16 Optical Scanner Mounting Body 18 Laser Light Guide Chamber 18a Laser Light Entrance 18b Laser Light Exit 20 X-Axis Optical Scanner 22 Y-Axis Optical Scanner 24, 26 Mounting Member 28 Laser Scanning Section 30 X-Axis Rotating Mirror 32 Y Axial rotating mirror 34 Laser light inlet 38 Laser light outlet 46, 48 Reflecting mirror

Claims (3)

(57) [Claims] 1. A laser scanning unit comprising an X-axis rotating mirror and a Y-axis rotating mirror that rotate on mutually orthogonal axes, and an X-axis optical unit that rotationally drives the X-axis rotating mirror.
A scanner and a Y-axis optical drive that rotates and drives the Y-axis rotating mirror.
The optical scanner comprises: a scanner; and a chamber-type optical scanner attachment body in which the X-axis optical scanner and the Y-axis optical scanner are attached and fixed in a state where the laser scanning unit is housed in a room. 2 of the mounting body orthogonal to each other
An opening for passing the rotation drive shafts of the X-axis optical scanner and the Y-axis optical scanner is provided at a predetermined position of one wall surface, and the X-axis optical scanner and A laser marking device, wherein each of the Y-axis optical scanners is attached and fixed to the optical scanner attachment body. 2. A laser scanning unit composed of an X-axis rotating mirror and a Y-axis rotating mirror that rotate on mutually orthogonal axes, and an X-axis optical unit that rotationally drives the X-axis rotating mirror.
A scanner and a Y-axis optical drive that rotates and drives the Y-axis rotating mirror.
The X-axis optical scanner and the Y-axis optical scanner are attached and fixed in a state where the scanner and the laser scanning unit are housed in a room, and the laser light from the laser oscillation unit is passed through the laser scanning unit in the room. A chamber having a first wall surface provided with a first opening for entering and a second wall surface provided with a second opening for outputting the laser light reflected by the laser scanning unit to the optical lens side outside the room. Type optical scanner mounting body, having a laser light inlet for entering the laser light from the laser oscillator into the room, and a laser light outlet for emitting the laser light to the optical scanner mounting body side, A laser light guide chamber that is fitted and integrally coupled to an optical scanner mounting body, and is fixedly arranged at a predetermined position in the laser light guide chamber in a predetermined direction. Laser marking apparatus characterized by comprising a one or two or more laser beam reflecting mirror, a. 3. An opening for passing a mirror rotation drive shaft of an optical scanner is provided at an optical scanner mounting position of a chamber type optical scanner mounting body, and a positioning flange portion that can be fitted into the opening is provided. A jig having a mounting member aligned with the mounting surface of the optical scanner and having a hole that can be inserted into the mirror rotation drive shaft and an outer peripheral surface or an inner peripheral surface that can be detachably fitted to the flange portion. The mounting member is aligned with the mirror rotation drive shaft using
An optical scanner mounting method comprising mounting and fixing to a mounting surface of a scanner, and then fitting a flange portion of the mounting member into the opening to mount and fix the mounting member to the optical scanner mounting body.