JP2005201874A - Laser marking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laser marking device enhanced in precision for a vertical line or a horizontal line by a laser beam. <P>SOLUTION: This device is provided with a plurality of laser output parts provided respectively with laser sources 11a, for outputting the laser beam, a prism block 21 provided integrally with prism parts 24a, for changing optical paths of the laser beams from the laser sources 11a, to desired directions, and cylindrical lenses for converting the laser beams optical-path-changed by the prism parts 24a, into line light beams, substantially cylindrical laser device main bodies attached adjacently each other to make the laser sources 11a, of the respective laser output parts substantially parallel to an axial direction (vertical direction), and main body support parts for supporting the laser device main bodies with respect to setting-out device main bodies swingably in the whole circumferential direction, and for supporting the laser device main bodies under an erected condition to make the axial direction substantially parallel to a vertical direction by a dead weight of the laser device main bodies. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a laser marking device for performing marking using line light generated by a laser beam.

2. Description of the Related Art Conventionally, a laser light source that outputs laser light, a laser output unit that includes a cylindrical lens that converts laser light output from the laser light source into fan-shaped line light, and a columnar laser device to which the laser output unit is attached The main body and a gimbal mechanism that supports the laser device main body so as to be swingable in the entire circumferential direction. The laser device main body swings due to its own weight, thereby maintaining a vertical posture in the vertical direction. There is a laser marking device that irradiates the ceiling or wall of a room with horizontal line light or vertical line light from a laser beam regardless of the posture of the dispensing body, and performs marking work on vertical lines and horizontal lines ( For example, see Patent Document 1).
JP-A-9-159451

  The above-mentioned laser marking device is provided with two laser output units for irradiating the money line, and the two laser output parts are mounted side by side with respect to the laser device main body. In order to irradiate twice, the two laser output portions are attached to the laser device main body in a state where the two laser output portions are inclined obliquely upward by, for example, 20 to 50 degrees with respect to the horizontal plane. In addition, the laser output unit for irradiating the lead line is arranged below the laser output unit for irradiating the kane line. In order to cross the bevel line at the top without vignetting, it was necessary to project the laser output unit for irradiating the straight line from the laser device main body to some extent in the horizontal direction. In this way, the two laser output parts that irradiate the money line are attached obliquely with respect to the horizontal plane, and the laser output part that irradiates the straight line is attached in a state protruding to some extent in the horizontal direction, The center of gravity of the laser device main body becomes difficult to obtain, and the positioning accuracy of the laser device main body by the gimbal mechanism is deteriorated, and the vertical or horizontal level of the vertical line or horizontal line output from the laser output unit is deteriorated. There was a problem that the accuracy of.

  In addition, the laser marking unit is equipped with a plurality of laser output units arranged in the vertical direction to output horizontal lines and vertical lines (line and kink lines), so a power supply line is attached to each laser output unit. In order to make the connection, the distance for drawing the power supply line in the laser device main body has been long. For this reason, if the laser device body is displaced due to the swing of the cymbal mechanism or the like, the position of the power supply line is likely to shift, and the position of the center of gravity of the laser device body changes due to the position shift of the power supply line. There is also a problem that the position of the vertical line or horizontal line output from the laser output unit is displaced due to the change in the angle.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a laser marking device in which the accuracy of vertical lines or horizontal lines by laser light is improved.

  In order to achieve the above-mentioned object, the invention of claim 1 includes a plurality of laser output units that respectively output line light by laser light, a laser device main body to which a plurality of laser output units are attached, and an ink jet main body. A laser marking device including a main body support unit that supports the laser device main body in a swingable manner and maintains a posture in which the laser device main body is suspended in the vertical direction. A laser output unit that outputs vertical line light has a laser light source arranged so that an optical axis is substantially parallel to the vertical direction, and an optical member that reflects the laser light from the laser light source and changes its optical path in a desired direction And a cylindrical lens that converts laser light whose optical path has been changed by an optical member into line light.

  According to a second aspect of the present invention, in the first aspect of the present invention, at least laser light sources that output vertical line light are attached to the same holding member.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the optical member comprises a prism that changes the optical path of the laser beam by totally reflecting the laser beam incident therein.

  The invention of claim 4 is characterized in that, in the invention of claim 3, a prism block is formed by integrally forming prisms included in at least two of the plurality of laser output portions.

  The invention of claim 5 is the attachment means for detachably attaching a plurality of laser light sources, cylindrical lenses and optical members used for irradiating a plurality of line lights in any one of the inventions of claim 1, 3 or 4. 1 to a plurality of optical members used for irradiating desired line light out of a plurality of line lights, and a laser light source and a cylindrical lens corresponding to the one to the plurality of optical members. It is characterized by being attached to the laser device main body via

  As described above, in the invention of claim 1, at least the laser light source of the laser output unit that irradiates the vertical line light is mounted so that the optical axis thereof is substantially parallel to the vertical direction, and is output from the laser light source. Since the optical path of the laser beam is changed in a desired direction by an optical member and is incident on the corresponding cylindrical lens, there is no need to attach the laser light source for irradiating the bevel line obliquely with respect to the horizontal plane as in the prior art. Further, since it is not necessary to project the laser light source for irradiating the line to some extent in the horizontal direction, there is an effect that the position of the center of gravity of the laser device body is stabilized. As a result, the stationary position of the laser device main body is stabilized and the positioning accuracy is improved, so that the verticality or horizontality of the vertical line or horizontal line output from the laser output unit is improved, and the marking accuracy is increased. effective.

  In the invention of claim 2, since the laser light source of the laser output unit that irradiates at least vertical line light is attached to the same holding member, when connecting the power supply line to the plurality of laser output units, The distance to be routed is short. As a result, even if the laser device main body is displaced due to the swing of the cymbal mechanism or the like, the position of the feeder line is less likely to occur, the position of the center of gravity of the laser device main body is stabilized, and the positioning accuracy of the laser device main body is improved. In addition, the vertical line or horizontal line output from the laser output unit is increased in the vertical and horizontal levels, so that the ink marking accuracy is improved.

  In the invention of claim 3, since the optical path of the laser beam is changed by totally reflecting the laser beam output from the laser output unit using a prism, 100% of the laser beam output from the laser output unit is changed. Can be reflected with a reflection efficiency close to.

  According to a fourth aspect of the present invention, a prism block is formed by integrally forming prisms included in at least two laser output units among a plurality of laser output units, and the prisms included in each laser output unit are formed separately. In such a case, there is a possibility that the direction of the laser beam output from the laser output unit will be shifted due to backlash or the like when the prism is incorporated, but the prism block in which the prisms included in at least two laser output units are integrally formed Therefore, it is possible to prevent the deviation of the direction of the laser beam due to the looseness at the time of incorporation, and the effect of improving the accuracy of inking. Further, since the prism block in which at least two prisms are integrally formed is provided, the number of parts can be reduced, and the assembling workability can be improved.

  In the invention of claim 5, the attachment member includes attachment means for detachably attaching a laser light source, a cylindrical lens and an optical member which are used for outputting a plurality of line lights, and these attachment means are used. Since one or more optical members used for irradiating the desired line light and a laser light source and a cylindrical lens corresponding to the one or more optical members are attached to the attachment member, the desired line light is output. By attaching only the laser light source, cylindrical lens, and optical member necessary for the mounting to the mounting member, and removing the other laser light source, cylindrical lens, and optical member, the laser light source and cylindrical lens can be adapted to the output specifications of the line light. And the combination of optical members can be changed. Therefore, when the number of line lights to be output is small, the number of laser light sources, cylindrical lenses, and optical members attached to the laser device main body can be reduced to reduce the weight of the laser device main body, and the laser device There is also an effect that it is possible to reduce the load applied to the main body support portion when an impact such as dropping is applied due to the weight reduction of the main body, and to prevent the main body support portion from being damaged.

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

(Embodiment 1)
Embodiment 1 of this invention is demonstrated based on FIGS. FIG. 7 is a cross-sectional view schematically showing the laser marking device of the present embodiment. The cylindrical outer shell 1 is elongated in the vertical direction, and three supports are connected to the lower portion of the outer shell 1 at the upper end. A laser device main body 4 is attached to the inside of the outer shell 1 via a biaxial gimbal mechanism 3 (main body support portion) having two pivot shafts that intersect at right angles. That is, the laser device body 4 is supported by the gimbal mechanism 3 so as to be swingable with respect to the outer shell 1 in the entire circumferential direction. Regardless of the case, it is possible to maintain a posture in which the axial direction of the laser device body 4 is substantially parallel to the vertical direction.

  The laser device main body 4 is formed in a cylindrical shape, in which a light source block 10 for outputting laser light and a laser light output from the light source block 10 are converted into a linear laser light (line light). And an optical system block 20 for irradiating in a desired direction. 7 schematically shows the inside of the laser device main body 4, the light source block 10 is shown below the pivot shaft of the gimbal mechanism 3. The system block 20 is disposed above the pivot shaft of the gimbal mechanism 3.

  FIGS. 1 to 3 are exploded perspective views of main parts showing the light source block 10 and the optical system block 20 in an enlarged manner. The configurations of the light source block 10 and the optical system block 20 will be described with reference to these drawings.

  The light source block 10 houses a light emitting element 12a such as a semiconductor laser element that outputs laser light and a light projecting lens 12b that converts the laser light output from the light emitting element 12a into collimated light in a cylindrical case 12c. Each of the plurality of laser light sources 11a to 11d configured and a drive circuit 13 that receives power supply from the battery B attached to the support leg 2 and drives the light emitting elements 12a of the laser light sources 11a to 11d. .

  Here, the laser light source 11a is a light source that irradiates a line light (horizontal line Lh) that spreads in a fan shape in a plane substantially parallel to the horizontal plane, and the laser light source 11b is a line light that spreads in a fan shape in a plane substantially parallel to the vertical plane. The light source that irradiates the line Lv1), the laser light source 11c, is a line light that spreads in a fan shape mainly in the region on the left side in FIG. 3 in a plane substantially parallel to the horizontal line Lv1 and a plane substantially perpendicular to the horizontal plane. The laser light source 11d is a light source that irradiates fan-shaped line light (Kane line Lv3) mainly in the right side of FIG. 3 within the plane irradiated with the Kane line Lv2. The laser light sources 11a to 11d are attached in a state where the rectangular body 14 (holding member) is inserted through the attachment hole 14c penetrating in the vertical direction (see FIG. 3).

  On the other hand, the optical system block 20 is a prism that changes the optical path of the laser light by allowing the laser light output above the four laser light sources 11a to 11d to enter and reflecting the incident laser light in a desired direction. The block 21 and cylindrical lenses 22a to 22d that convert the laser light whose optical path has been changed by the prism block 21 into fan-shaped line light that is substantially parallel to the vertical or horizontal plane and output it.

  The prism block 21 is integrally formed of a translucent synthetic resin, and a surface (lower surface) facing the laser light sources 11a to 11d is a flat surface substantially parallel to the horizontal surface (this surface is referred to as an incident surface A). The formed flat plate portion 23 and four prism portions 24a to 24d provided on the upper surface of the flat plate portion 23 corresponding to the respective laser light sources 11a to 11d are provided.

  The prism portion 24a is a right-angle prism, and the laser light incident from the area A1 facing the laser light source 11a on the incident surface A is reflected by the prism surface B1, and the optical path of the laser light is changed in the horizontal direction. Then, after the laser beam reflected by the prism surface B1 is emitted to the outside from the emission surface C1 substantially perpendicular to the incident surface A, it is arranged in front of the emission surface C1 so that the axial direction is along the vertical direction. The cylindrical lens 22a converts the light into fan-shaped line light in a plane (horizontal plane) substantially perpendicular to the central axis of the cylindrical lens 22a, and a horizontal line Lh is formed by the line light.

  The prism portion 24b has a prismatic shape with a quadrangular shape when viewed from the side, and the laser light incident from the area A2 facing the laser light source 11b on the incident surface A is inclined obliquely with respect to the incident surface A. Reflected by the surface B2, the optical path of the laser light is changed upward from the horizontal plane. Then, the laser beam reflected obliquely upward by the prism surface B2 is emitted to the outside from the emission surface C2 substantially perpendicular to the optical path of the laser beam, and then the axial direction is in the horizontal direction in front of the emission surface C2. The cylindrical lens 22b arranged along the axis is converted into line light spreading in a fan shape in a plane (vertical surface) substantially perpendicular to the central axis of the cylindrical lens 22b, and a straight line Lv1 is formed by the line light.

  The prism portion 24c has a prismatic shape (substantially the same shape as the prism portion 24b) formed in a quadrangular shape in a side view, and the laser light incident from the area A3 facing the laser light source 11c on the incident surface A is incident surface Reflected by the prism surface B3 inclined obliquely with respect to A, the optical path of the laser light is changed upward from the horizontal plane. Then, the laser beam reflected obliquely upward by the prism surface B3 is emitted to the outside from the emission surface C3 substantially perpendicular to the optical path of the laser beam, and then the axial direction is in the horizontal direction in front of the emission surface C3. The cylindrical lens 22c arranged along the axis is converted into line light that spreads in a fan shape within a plane (vertical surface) substantially perpendicular to the central axis of the cylindrical lens 22c, and this line light mainly causes the region on the left side in FIG. The shine line Lv2 is formed.

  The prism portion 24d has a prismatic shape (substantially the same shape as the prism portions 24b and 24c) formed in a quadrangular shape when viewed from the side, and the laser light incident from the area A4 facing the laser light source 11d on the incident surface A is Reflected by the prism surface B4 inclined obliquely with respect to the incident surface A, the optical path of the laser light is changed upward from the horizontal plane. Then, the laser beam reflected obliquely upward by the prism surface B4 is emitted to the outside from the emission surface C4 substantially perpendicular to the optical path of the laser beam, and then the axial direction is in the horizontal direction in front of the emission surface C4. The cylindrical lens 22d arranged so as to be converted into line light that spreads in a fan shape within a plane (vertical surface) substantially perpendicular to the central axis of the cylindrical lens 22d, and this line light mainly causes the region on the right side in FIG. The shine line Lv3 is formed.

  Here, the prism surfaces B1 to B4 of the respective prism portions 24a to 24d are at an angle such that the incident angle of the laser beam with respect to the prism surfaces B1 to B4 is equal to or greater than the total reflection angle (critical angle), with respect to the optical path of the laser beam. Therefore, the laser light incident on the prism surfaces B1 to B4 is totally reflected with a reflection efficiency of approximately 100%.

  Next, a structure for attaching the light source block 10 and the optical system block 20 to the laser device body 4 will be described with reference to FIGS.

  On the upper surface of the body 14 to which the four laser light sources 11a to 11d are embedded, the portions corresponding to the corners of the flat plate portion 23 of the prism block 21 are in contact with the outer side surfaces of the corner portions of the flat plate portion 23, respectively. A substantially rib-shaped support rib 14a in a plan view is integrally projected, and a lower surface of the flat plate portion 23 is placed on a corner portion formed by two inner surfaces of the support rib 14a facing the corner portion of the flat plate portion 23. The mounting step portion 14b protrudes integrally with the support rib 14a. In FIG. 1 to FIG. 3, the support rib 14 a and the mounting step 14 b are omitted for the sake of simplicity.

  On the other hand, each of the four cylindrical lenses 22a to 22d is attached to a fitting hole 25a penetrating through the rectangular plate-like attachment plate 25 by a method such as press fitting or adhesion. The four mounting plates 25 to which the cylindrical lenses 22a are respectively attached are fixed to a square hole-shaped window hole 26a penetrating the substantially box-shaped cover 26 whose bottom surface is opened by a method such as press fitting or adhesion. ing. Note that the size of the opening of the cover 26 is slightly larger than that of the body 14. Further, the portion of the cover 26 to which the mounting plate 25 to which the cylindrical lenses 22b to 22d for outputting the vertical lines are fixed is attached is a taper substantially parallel to the emission surfaces C2 to C4 of the corresponding prism portions 24b to 24d. A surface 26b is formed.

  Thus, in assembling the light source block 10 and the optical system block 20, first, the mounting plate 25 to which the cylindrical lenses 22a to 22d are fixed is placed so that the axial direction of the cylindrical lenses 22a to 22d is directed to a predetermined direction. It fixes to the window hole 26a of the cover 26 (refer FIG. 4). Next, when the prism block 21 is mounted and fixed on the mounting step portion 14b of the body 14, the corners of the prism block 21 come into contact with the two inner side surfaces of the support rib 14a, so that the prism block 21 is moved to the body 14. The laser light sources 11a to 11d face the facing areas A1 to A4 on the lower surface of the prism block 21, respectively (see FIG. 5). When the cover 26 is placed and fixed from the upper side of the body 14, the prism block 21 is housed in a space surrounded by the cover 26 and the body 14, and the assembly of the light source block 10 and the optical system block 20 is completed. At this time, the inner side surface of the cover 26 abuts on the side surface of the body 14, so that the positional deviation in the planar direction of the cover 26 is restricted, and the support ribs 14 a protruding from the upper surface of the body 14 are provided inside the cover 26. By abutting a locking step (not shown) projecting on the side surface, the vertical displacement of the cover 26 is restricted, and in front of the exit surfaces C1 to C4 of the prism portions 24a to 24d. Cylindrical lenses 22a to 22d are arranged. Then, the light source block 10 and the optical system block 20 are fixed to the laser device body 4 by attaching the body 14 to the laser device body 4 in a state where both the blocks 10 and 20 are assembled.

  The laser marking device of the present embodiment has the above-described structure, and all of the laser light sources 11a to 11d including the laser light sources 11b to 11d that output vertical lines are located above the cylindrical laser device body 4. Since it is attached to the portion (above the pivot shaft of the gimbal mechanism 3) so as to be substantially parallel to the axial direction of the laser device main body 4, the laser light sources 11b to 11d are obliquely upward with respect to the horizontal plane. The diameter of the upper portion of the laser device main body 4 can be made smaller than the case where the laser device main body 4 is attached to the laser device main body 4, thereby lowering the center of gravity of the laser device main body 4. Here, since the laser device main body 4 is pivotally supported by the gimbal mechanism 3 so as to be swingable in the entire circumferential direction, the laser device main body 4 can be stopped (rest position) by lowering the position of the center of gravity of the laser device main body 4. However, the positioning accuracy is improved and the verticality or horizontality of the vertical line or horizontal line output from the laser output unit is increased, so that the accuracy of marking is improved. Further, since the plurality of laser light sources 11a to 11d are attached close to each other with respect to the laser device main body 4, the distance for feeding the power supply line to each laser light source 11a to 11d can be short, and the laser device main body 4 swings. Even if it does, since it becomes difficult to occur the position shift of the feed line, it is possible to prevent the stop position of the laser apparatus body 4 from shifting due to the position shift of the feed line, and to improve the positioning accuracy of the laser apparatus body 4, The vertical or horizontal level of the vertical line or horizontal line output from the laser output unit is increased, and the accuracy of inking is improved.

  In the present embodiment, prism portions 24a to 24d are used as optical members that change the optical path of the laser light output above the laser light sources 11a to 11d in a desired direction, and the prism surfaces B1 to B1 of the prism portions 24a to 24d are used. Since the laser beam is totally reflected in a desired direction at B4, the laser beam can be reflected with a reflection efficiency of approximately 100%, and the laser beam can be used efficiently.

  Furthermore, in the present embodiment, line light is generated from the laser light sources 11a, prism sections 24a that change the optical paths of the laser beams from the laser light sources 11a, and laser beams whose optical paths are converted by the prism sections 24a. 4 sets of cylindrical lenses 22a to be generated, and each set constitutes a laser output section, and prism sections 24a to 24d of each laser output section are integrally formed on the upper surface of the flat plate section 23. 21 is used. Here, when the plurality of prism portions 24a to 24d are separately formed, a deviation occurs in the direction of the laser beam output from the laser output portion due to backlash when the prism portions 24a to 24d are incorporated. Since 24a to 24d are formed integrally with the prism block 21, the direction of the laser beam is not affected by play or the like when assembled, and the relative angles of the prism surfaces B1 to B4 of the respective prism portions 24a to 24d. Therefore, the accuracy of the laser beam irradiation direction can be further improved. Further, since the plurality of prism portions 24a to 24d are formed integrally with the prism block 21, the number of parts can be reduced and the assembly workability can be improved. The prism block 21 is made of a synthetic resin such as acrylic or polycarbonate, and can be formed by resin molding. Therefore, there is an advantage that the manufacturing cost of the optical member can be reduced as compared with the case where a reflecting mirror is used as the optical member. is there. Needless to say, the prism block 21 may be made of glass. In the present embodiment, the prism portions 24a to 24d of all the laser output portions are formed integrally with the prism block 21, but at least two of the four prism portions 24a to 24d may be formed integrally. As described above, there are advantages that the deviation of the direction of the laser beam is suppressed and the assembling workability is improved.

  Furthermore, in this embodiment, four sets of laser light sources 11a, cylindrical lenses 22a, and prism block 21 used for irradiating four types of line light (horizontal line Lh, vertical line Lv1, and chain line Lv2, Lv3) The body 14 is provided with mounting holes 14c as mounting means for detachably mounting the four laser light sources 11a, and the cover 26 has four mounting plates 25 each holding a cylindrical lens 22a. A window hole 26a is provided as attachment means that can be detachably attached, and a support rib 14a for attaching the prism block 21 is provided in the body 14. Therefore, among the four types of line light, only the prism portions 24a necessary for irradiating the desired line light are formed in the prism block 21 and correspond to the prism portions 24a provided in the prism block 21. By selectively attaching only the laser light source 11a ... and the cylindrical lens 22a ... to the body 14 or the cover 26 as an attachment member, an unnecessary laser light source 11a ..., a cylindrical lens 22a ... 24a can be eliminated and the combination of the laser light sources 11a, the cylindrical lenses 22a, and the prism portions 24a can be changed. Therefore, when the number of line lights to be output is small, it is possible to reduce the number of laser light sources 11a... And cylindrical lenses 22a. In addition, the load applied to the gimbal mechanism 3 that supports the laser device body 4 when an impact such as dropping is applied due to the weight reduction of the laser device body 4 can be reduced, and the gimbal mechanism 3 can be prevented from being damaged.

(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIGS. In the first embodiment described above, the four laser light sources 11a to 11d are attached to the body 14 so as to be substantially parallel to the vertical direction, whereas in the present embodiment, vertical lines (line Lv1 and chain lines Lv2, Lv3) are provided. The three laser light sources 11b to 11d for output are attached to the body 14 so as to be substantially parallel to the vertical direction, and the laser light source 11a for outputting the horizontal line Lh is attached to the laser device body 4 so as to be substantially parallel to the horizontal direction. It is. Since the basic configuration of the laser marking device is the same as that of the first embodiment, common components are denoted by the same reference numerals, and description thereof is omitted.

  8 and 9 (a) and 9 (b) are exploded perspective views of the main part showing the light source block 10 and the optical system block 20 in an enlarged manner. With reference to these drawings, the light source block 10 and the optical system block 20 are shown. The configuration will be described.

  The light source block 10 includes a laser light source 11a that irradiates a horizontal line Lh that extends in a fan shape in a plane substantially parallel to the horizontal plane, a laser light source 11b that irradiates a line Lv1 that extends in a fan shape in a plane substantially parallel to the vertical plane, A laser light source 11c that irradiates a fan-shaped line Lv2 that extends in a fan shape in a plane substantially parallel to the line Lv1 and a plane that is substantially perpendicular to the horizontal plane, and a fan-shaped line Lv3 that extends in a fan shape in a plane that is irradiated with the money line Lv2. And a laser light source 11d for irradiating. Of the four laser light sources 11a to 11d, three laser light sources 11b to 11d for outputting a vertical line are attached in a state of being inserted through attachment holes 14c penetrating the rectangular parallelepiped body 14 in the vertical direction. ing. The laser light source 11a for outputting a horizontal line is attached to a rectangular parallelepiped base 15 formed separately from the body 14 in a state where the base 15 is inserted into an attachment hole 15a penetrating in the horizontal direction. It has been.

  Here, the laser light source 11a has a cylindrical case 12c, the light emitting element 12a and the light projecting lens 12b are housed in the case 12c, and the cylindrical lens 22a is half embedded in the front surface of the case 12c. It is attached with. The cylindrical lens 22a is arranged so that its axial direction is substantially parallel to the vertical direction, and the laser light incident from the light emitting element 12a via the light projecting lens 12b is aligned with the axial direction of the cylindrical lens 22a by the cylindrical lens 22a. It is converted into line light that spreads in a fan shape within a vertical plane (horizontal plane), and a horizontal line Lh is formed by this line light.

  On the other hand, the optical paths of the laser beams output from the three laser light sources 11b to 11d that output the vertical lines are changed in desired directions by the prism portions 24b to 24d provided in the prism block 21, respectively.

  The prism block 21 is formed of a translucent synthetic resin, and has a substantially T-shaped plan view in which a surface (lower surface) facing the laser light sources 11b to 11d is formed on a flat surface (incident surface A) substantially parallel to the horizontal surface. A flat plate portion 23 and three prism portions 24b to 24d respectively provided on the upper surface of the flat plate portion 23 corresponding to the respective laser light sources 11b to 11d are provided.

  The prism portion 24b is a prism having a quadrangular shape when viewed from the side, and the laser beam incident from the area A2 facing the laser light source 11b on the incident surface A is obliquely inclined with respect to the incident surface A. Reflected by the surface B2, the optical path of the laser light is changed upward from the horizontal plane. Then, the laser beam reflected obliquely upward by the prism surface B2 is emitted to the outside from the emission surface C2 substantially perpendicular to the optical path of the laser beam, and then the axial direction is in the horizontal direction in front of the emission surface C2. The light enters the cylindrical lens 22b that is disposed along. The laser light incident on the cylindrical lens 22b is converted into line light that spreads in a fan shape in a plane (vertical surface) substantially perpendicular to the central axis of the cylindrical lens 22b, and a line Lv1 is formed by the line light.

  The prism portion 24c has a prismatic shape with a quadrangular shape when viewed from the side, and the laser beam incident from the area A3 facing the laser light source 11c on the incident surface A is inclined obliquely with respect to the incident surface A. Reflected by the surface B3, the optical path of the laser light is changed upward from the horizontal plane. The laser beam reflected obliquely upward by the prism surface B3 is emitted to the outside from the emission surface C3 substantially perpendicular to the optical path of the laser beam, and then the axial direction of the cylindrical lens 22b is in front of the emission surface C3. Is incident on a cylindrical lens 22c that is arranged so as to be substantially orthogonal to the axial direction of the lens and to be substantially parallel to the horizontal direction. The laser light incident on the cylindrical lens 22c is converted into line light that spreads in a fan shape in a plane substantially perpendicular to the central axis of the cylindrical lens 22c (a plane parallel to the line Lv1 and a plane substantially perpendicular to the horizontal plane). As a result, the line Lv2 that is mainly irradiated to the left region in FIG. 8 is formed.

  The prism portion 24d has a prismatic shape in which the shape in side view is a quadrangle, and the laser light incident from the area A4 facing the laser light source 11d on the incident surface A is inclined with respect to the incident surface A. Reflected by the prism surface B4, the optical path of the laser light is changed upward from the horizontal plane. The laser beam reflected obliquely upward by the prism surface B4 is emitted to the outside from the emission surface C4 substantially perpendicular to the optical path of the laser beam, and then the cylindrical lens 22c has an axial direction in front of the emission surface C4. Is incident on a cylindrical lens 22d that is arranged so as to be substantially parallel to the axial direction. The laser light incident on the cylindrical lens 22d is converted into line light that spreads in a fan shape in a plane (vertical surface irradiated with the curve line Lv2) that is substantially perpendicular to the central axis of the cylindrical lens 22d. A money line Lv3 is formed to irradiate the right region in FIG.

  Here, the prism surfaces B2 to B4 of the respective prism portions 24b to 24d are inclined at an angle such that the incident angle of the laser beam with respect to the prism surfaces B2 to B4 is equal to or greater than the total reflection angle (critical angle). The laser light incident on the surfaces B2 to B4 is totally reflected with a reflection efficiency of approximately 100%.

  Next, a structure for attaching the light source block 10 and the optical system block 20 to the laser device main body 4 will be described with reference to FIGS.

  The base 15 to which the laser light source 11a is attached has a substantially rectangular parallelepiped shape. The vertical and horizontal dimensions of the upper surface of the base 15 are formed to be slightly larger than the vertical and horizontal dimensions of the bottom surface of the body 14, and the four corners of the upper surface of the base 15 are formed. A rib 15b having a substantially L-shape in plan view that abuts against the outer surface of the corner portion of the body 14 is integrally provided. In addition, a recess 15c for allowing the terminal pins of the laser light sources 11b to 11d projecting from the lower surface of the body 14 to escape is formed in the approximate center of the upper surface of the base 15.

  On the other hand, on the upper surface of the body 14 to which the three laser light sources 11b to 11d are embedded, the outer surface of each corner is located at a portion corresponding to the corner of the horizontal bar portion of the flat plate portion 23 of the prism block 21. Are formed integrally with each other, and the lower surface of the flat plate portion 23 is placed on the corner portion formed by the two inner surfaces of the support rib 14a facing the corner portion of the vertical bar portion. The mounting step portion 14b is projected integrally with the support rib 14a. On the upper surface of the body 14, strip-shaped support ribs 14d and 14d that are in contact with the side edges of the vertical bar portion are integrally formed at portions corresponding to both side edges of the vertical bar portion of the flat plate portion 23, respectively. A mounting step portion 14e on which the lower surface of the flat plate portion 23 is mounted is provided at the tip of each support rib 14d.

  Each of the three cylindrical lenses 22b to 22d is attached to a fitting hole 25a penetrating the rectangular plate-like attachment plate 25 by a method such as press fitting or adhesion. Then, the three mounting plates 25 to which the cylindrical lenses 22b to 22d are attached are fixed to a square hole-like window hole 26a penetrating the substantially box-shaped cover 26 whose lower surface is opened by a method such as press fitting or adhesion. ing. Note that the size of the opening of the cover 26 is slightly larger than that of the body 14. Further, a tapered surface 26b substantially parallel to the emission surfaces C2 to C4 of the corresponding prism portions 24b to 24d is formed at the portion of the cover 26 to which the mounting plate 25 is attached.

  Thus, in assembling the light source block 10 and the optical system block 20, first, the laser light source 11a is inserted into the mounting hole 15a penetrating the base 15 and held in the base 15, and the laser light sources 11b to 11d. Is inserted into a mounting hole 14c penetrating the body 14 and is held by the body 14, and the mounting plate 25 to which the cylindrical lenses 22b to 22d are fixed is attached to the cylindrical lens 22b to 22d in a predetermined direction. It fixes to the window hole 26a of the cover 26 so that it may face (refer FIG.10 and FIG.11). Then, when the body 14 to which the laser light sources 11b to 11d are attached is placed and fixed on the upper surface of the base 15 to which the laser light source 11a is attached, the support ribs 15b come into contact with the corners of the body 14. The body 14 is positioned with respect to the base. Next, when the prism block 21 is mounted and fixed on the mounting steps 14b and 14e of the body 14, the corners of the horizontal bar portion of the flat plate portion 23 abut against the two inner surfaces of the support rib 14a, and the The prism block 21 is positioned with respect to the body 14 by the both side edges of the rod portion being in contact with the side edges of the support rib 14d, and the laser light sources 11b to 11d respectively face the facing areas A2 to A4 on the lower surface of the prism block 21. (See FIG. 12). When the cover 26 is placed and fixed from the upper side of the body 14, the prism block 21 is housed in a space surrounded by the cover 26 and the body 14, and the assembly of the light source block 10 and the optical system block 20 is completed. At this time, the inner side surface of the cover 26 abuts on the side surface of the body 14, so that the positional deviation in the planar direction of the cover 26 is restricted, and the support ribs 14 a protruding from the upper surface of the body 14 are provided inside the cover 26. By abutting a locking step portion (not shown) projecting on the side surface, the vertical displacement of the cover 26 is restricted, and in front of the emission surfaces C2 to C4 of the prism portions 24b to 24d. Cylindrical lenses 22b to 22d are arranged. The light source block 10 and the optical system block 20 are fixed to the laser device main body 4 by fixing the base 15 to the laser device main body 4 in a state where both the blocks 10 and 20 are assembled.

  The laser marking device of the present embodiment has the above-described structure, and the laser light sources 11b to 11d that output vertical lines (the vertical line Lv1 and the fringe lines Lv2 and Lv3) are columnar laser device bodies 4 respectively. Are mounted so as to be substantially parallel to the axial direction of the laser device main body 4 so that the laser light source 11b itself is inclined upward with respect to the horizontal plane. The diameter of the upper portion of the laser device main body 4 can be reduced compared with the case where it is attached to the laser device main body 4, thereby lowering the position of the center of gravity of the laser device main body 4. Here, since the laser device main body 4 is pivotally supported by the gimbal mechanism 3 so as to be swingable in the entire circumferential direction, the laser device main body 4 can be stopped (rest position) by lowering the position of the center of gravity of the laser device main body 4. However, the positioning accuracy is improved and the verticality of the vertical line output from the laser output unit is increased, so that the accuracy of marking is improved. Further, since the plurality of laser light sources 11b to 11d are mounted close to each other with respect to the laser device main body 4, the distance for feeding the power supply line to each laser light source 11b to 11d can be short, and the laser device main body 4 swings. Even if it does, since it becomes difficult to occur the position shift of the feed line, it is possible to prevent the stop position of the laser apparatus body 4 from shifting due to the position shift of the feed line, and to improve the positioning accuracy of the laser apparatus body 4, The perpendicularity of the vertical line output from the laser output unit is increased, and the accuracy of inking is improved.

  In the present embodiment, the prism portions 24b to 24d are used as optical members for changing the optical path of the laser light output above the laser light sources 11b to 11d in a desired direction, and the prism surfaces B2 to B2 of the prism portions 24b to 24d are used. Since the laser beam is totally reflected in a desired direction at B4, the laser beam can be reflected with a reflection efficiency of approximately 100%, and the laser beam can be used efficiently. Since the prism block 21 is made of synthetic resin and can be formed by resin molding, the manufacturing cost of the optical member can be reduced as compared with the case where a reflecting mirror is used as the optical member.

  Furthermore, in this embodiment, the laser light source 11b, a prism portion 24b for changing the optical path of the laser light from each laser light source 11b, and the line light from the laser light whose optical path is converted by each prism portion 24b. Three sets of cylindrical lenses 22b to be generated, and each set constitutes a laser output unit, and prism units 24b to 24d of each laser output unit are integrally formed on the upper surface of the flat plate unit 23. 21 is used. Here, when the plurality of prism portions 24b to 24d are separately formed, a deviation occurs in the direction of the laser beam output from the laser output portion due to backlash when the prism portions 24b to 24d are incorporated. Since 24b to 24d are formed integrally with the prism block 21, the direction of the laser beam is not affected by the backlash or the like at the time of incorporation, and the relative angles of the prism surfaces B2 to B4 of the prism portions 24b to 24d Therefore, the accuracy of the laser beam irradiation direction can be improved. In addition, since the plurality of prism portions 24b to 24d are formed integrally with the prism block 21, the number of parts can be reduced and the assembly workability can be improved. Moreover, since the prism block 21 is made of synthetic resin and can be formed by resin molding, there is an advantage that the manufacturing cost of the optical member can be reduced as compared with the case where a reflecting mirror is used as the optical member. In this embodiment, the prism portions 24b to 24d of the three laser output portions that output vertical lines are formed integrally with the prism block 21, but at least two of the three prism portions 24a to 24d are integrated. In the same manner as described above, there is an advantage that the deviation of the direction of the laser beam is suppressed and the assembling workability is improved.

  Further, in the present embodiment, three sets of laser light sources 11b, cylindrical lenses 22b, and prism block 21 used for irradiating three types of line lights (line Lv1 and chain lines Lv2, Lv3) are used. The body 14 is provided with an attachment hole 14c (attachment means) to which the laser light sources 11b to 11d for irradiating the above-described three types of vertical line light are detachably attached, and the cover 26 is provided with the above-described three types of vertical lines. A window hole 26a (attachment means) to which the three attachment plates 25 to which the cylindrical lenses 22b to 22d for irradiating light are attached is detachably attached is provided, and the prism block 21 is attached to the body 14. Support ribs 14a and 14d are provided. Therefore, among the three types of vertical line light, only the prism portions 24b necessary for irradiating the desired line light are formed in the prism block 21 and correspond to the prism portions 24b provided in the prism block 21. By selectively attaching only the laser light source 11b ... and the cylindrical lens 22b ... to the body 14 or the cover 26 as an attachment member, unnecessary laser light sources 11b ..., the cylindrical lens 22b ..., and the prism portion 24b according to the output specification of the line light. Can be changed, and the combination of the laser light source 11b, the cylindrical lens 22b, and the prism portion 24b can be changed. Therefore, when the number of line lights to be output is small, the number of laser light sources 11a ..., cylindrical lenses 22a ..., prism portions 24a ... attached to the laser device body 4 is reduced to reduce the weight of the laser device body 4. In addition, the load applied to the gimbal mechanism 3 (main body support portion) that supports the laser device main body 4 when an impact such as a drop is applied due to the weight reduction of the laser device main body 4 is reduced, and the gimbal mechanism 3 is damaged. Can be prevented.

FIG. 3 is an exploded perspective view of the first embodiment that can be partially omitted. The same as the above, (a) is an exploded perspective view that can be partially omitted when viewed from the upper side, and (b) is an exploded perspective view that can be partially omitted when viewed from the lower side. It is explanatory drawing of the line light output from an optical system same as the above. It is the disassembled perspective view which showed the same and showed the state before the assembly of a light source block and an optical system block. It is the disassembled perspective view which showed the same and showed the state in the middle of the assembly of a light source block and an optical system block. It is the external appearance perspective view of the state which showed the same and assembled the light source block and the optical system block. It is sectional drawing which looked at the same from the front. FIG. 6 is an exploded perspective view showing a part of Embodiment 2 that can be omitted. The same as the above, (a) is an exploded perspective view that can be partially omitted when viewed from the upper side, and (b) is an exploded perspective view that can be partially omitted when viewed from the lower side. It is an external appearance perspective view of the state which incorporated the laser light source in the base same as the above. It is a disassembled perspective view of a state in which the light source block and the optical system block are assembled and the body is incorporated in the base. It is a disassembled perspective view of a state in which a prism block is incorporated in a body, showing a state during assembly of the light source block and the optical system block. It is the external appearance perspective view of the state which showed the same and assembled the light source block and the optical system block.

Explanation of symbols

11a ... Laser light source 21 Prism block 22a ... Cylindrical lens 24a ... Prism section

Claims (5)

  A plurality of laser output units each outputting line light by laser light, a laser device main body to which the plurality of laser output units are attached, and the laser device main body swingably supported with respect to the inking device main body, In the laser marking device comprising a main body support portion that maintains a vertical posture in the laser device main body, a laser output portion that outputs at least vertical line light among the plurality of laser output portions, A laser light source arranged so that its optical axis is substantially parallel to the vertical direction, an optical member that reflects the laser light from the laser light source and changes its optical path in a desired direction, and a laser whose optical path has been changed by the optical member A laser marking device comprising a cylindrical lens for converting light into line light.   2. The laser marking device according to claim 1, wherein at least laser light sources for outputting vertical line light are attached to the same holding member.   3. The laser marking device according to claim 1, wherein the optical member comprises a prism that changes the optical path by totally reflecting the laser beam incident therein.   4. The laser marking device according to claim 3, further comprising a prism block integrally formed with prisms corresponding to at least two laser output portions among the plurality of laser output portions. An attachment member having attachment means for detachably attaching a plurality of laser light sources, a cylindrical lens, and an optical member used for irradiating the plurality of line lights is provided, and desired line light is emitted from the plurality of line lights. The one or more optical members used for the purpose and a laser light source and a cylindrical lens corresponding to the one or more optical members are attached to the laser device main body through the attachment member. 4. The laser marking device according to any one of 4 above.

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