JP2001033249A - Laser marking unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laser marking unit causing no backlash between the inner rings and outer rings of bearings, capable of fixing a pendulum reliably without applying unreasonable force to a support shaft, and capable of being made compact. SOLUTION: This laser marking unit is provided with a pendulum 8 rockably supported by a gimbal mechanism 201 and a laser unit 1 fitted to the pendulum 8, and a laser beam is emitted from the laser unit 1 and radiated to an object for leveling. The gimbal mechanism 201 is provided with at least one shaft 210 and at least two ball bearings 214. The inner rings 213 of two ball bearings 214 are inserted into a shaft 210 at the prescribed interval, and the outer rings 216 of two ball bearings 214 are excited by a pre-load spring 217 in the separating direction or approaching direction from or to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a reference line called a "tachi" or a "core" from a ceiling to a wall surface by a laser beam emitted from a laser projector when performing building work or partitioning a room. Alternatively, the present invention relates to a laser marking device that projects a reference line called “Roku” on a wall surface.

[0002]

2. Description of the Related Art A laser beam is originally a beam having an elliptical cross section. However, it passes through a collimating lens and a rod lens whose axis is horizontal to its optical axis to become a single vertical ray. Further, by passing the collimator lens and a rod lens whose axis is perpendicular to the optical axis, a single horizontal ray is obtained. The laser marking device uses a laser projector that projects such vertical rays or horizontal rays.The laser unit has a gimbal mechanism so that a vertical line or a horizontal line can be obtained with high accuracy even when the marking device is inclined. Supported through.

[0003] Most of conventional laser marking devices use a pendulum, but in a marking device of the type that projects only vertical lines, the pendulum is held by a one-axis gimbal mechanism. In order to lock the pendulum, it was sufficient to stop only the movement in one axial direction. However, since the pendulum is held by a two-axis gimbal mechanism in a laser marking device that projects a horizontal line,
In order to lock the pendulum, the movement in two axial directions must be stopped. Therefore, conventionally, in order to stop the operation in the two axial directions, a method of pushing up the pendulum by advancing a set screw from below the pendulum, fixing the pendulum from both sides, or pressing the pendulum to one side. There was a method of getting rid of them. But,
In any of these methods, there are problems that the operation of fixing the pendulum is troublesome, the fixing is unstable, and the pendulum cannot be securely fixed. There was also a drawback that an excessive force was applied to the shaft.

Further, a laser marking device using a pendulum often has a symmetrical structure with respect to two axes from the center of the gimbal mechanism. If a brake plate is arranged at the bottom, a brake device and the like are also required. Therefore, there was a problem that the size of the blackout device became large and the weight became large.

Further, the shaft used in the gimbal mechanism must operate smoothly with respect to the bearing. For this purpose, a very narrow clearance must be provided between the steel balls, the inner ring and the outer ring of the bearing. There is also a problem that it takes time and effort to adjust the clearance, and if the adjustment is inadequate, play is caused.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and there is no backlash between the inner ring and the outer ring of the bearing, and the pendulum is securely and unrestricted on the support shaft. An object of the present invention is to provide a laser marking device that can be fixed without such a problem and that can be made more compact.

[0007]

According to a first aspect of the present invention, there is provided a pendulum swingably supported by a gimbal mechanism, and a laser unit attached to the pendulum. In a laser marking device that emits a laser beam from a laser unit and irradiates an object to emit a level, the gimbal mechanism has at least one axis and at least two ball bearings, and the two ball bearings The inner race is fitted on the shaft at a predetermined interval, and the outer races of the two ball bearings are biased by a preload spring in a direction away from each other or in a direction toward each other.

According to a second aspect of the present invention, there is provided a pendulum swingably supported by a gimbal mechanism, and a laser unit attached to the pendulum. The laser unit emits a laser beam to irradiate an object. In the laser marking device, the gimbal mechanism has at least one shaft and at least two ball bearings, and inner rings of the two ball bearings are fitted at predetermined intervals on the shaft. The outer races of the two ball bearings are biased in a direction away from each other with a preload spring interposed therebetween, and the leaf springs are pressed on the outer races of the two ball bearings to keep the pendulum in a fixed position. It is characterized by being drooped.

According to a third aspect of the present invention, there is provided a pendulum swingably supported by a gimbal mechanism, and a laser unit attached to the pendulum. The laser unit emits a laser beam to irradiate an object. In a laser marking device that raises the level, the gimbal mechanism has two axes that are orthogonal to each other, one of which is supported by a support and has two ball bearings with an inner ring fitted on this axis. An oscillator is supported so as to be able to swing around the axis, the other axis is supported by the oscillator in a direction orthogonal to the one axis, and an inner ring is fitted to the axis. The pendulum is swingably supported via two ball bearings, and the outer rings of each of the two ball bearings fitted on one shaft and the other shaft are preloaded springs. Characterized in that it is biased in a direction approaching away orientation or together with each other Te.

According to a fourth aspect of the present invention, there is provided a pendulum swingably supported by a gimbal mechanism, and a laser unit attached to the pendulum. The laser unit emits laser light to irradiate an object. In a laser marking device that raises the level, the gimbal mechanism has two axes that are orthogonal to each other, one of which is supported by a support and has two ball bearings with an inner ring fitted on this axis. An oscillator is supported so as to be able to swing around the axis, the other axis is supported by the oscillator in a direction orthogonal to the one axis, and an inner ring is fitted to the axis. The pendulum is swingably supported via two ball bearings, and the outer rings of the two ball bearings fitted on the one shaft and the other shaft are each provided with a preload spring. It has been together with being pressed respectively leaf spring outside the outer ring of the two ball bearings a pendulum is biased in the direction away from each other characterized in that it is kept in a fixed position.

The invention according to claim 5 is the invention according to claim 3 or 4.
In the laser marking device described above, one of the shafts is held down by a leaf spring and supported by the support, and the axial displacement is regulated.

The invention according to claim 6 is the invention according to claim 3 or 4.
In the laser marking device described above, both ends of a wire spring bent in a U-shape are hooked on the oscillating body, and both ends of the wire spring press the other shaft, thereby causing the other shaft to be pressed. Are supported by the oscillating body and the axial displacement is regulated.

According to a seventh aspect of the present invention, in the laser marking device according to the sixth aspect, the wire spring has a central portion folded back and the folded portion is raised obliquely to form a knob. Features.

According to an eighth aspect of the present invention, there is provided a laser marking device which emits a laser beam extending in a horizontal direction and irradiates an object with a laser unit, and has a laser unit which can swing back and forth and right and left by a gimbal mechanism. With a supported pendulum,
A lock mechanism for locking the lowermost part of the pendulum from the periphery to lock the pendulum from swinging back and forth and right and left.

According to a ninth aspect of the present invention, in the laser marking device according to the eighth aspect, the pendulum integrally has a downwardly projecting portion at a lower end thereof, and the lock mechanism sandwiches the projecting portion from the periphery thereof to form a pendulum. It is characterized in that the rocking of the front, rear, left and right is locked.

According to a tenth aspect of the present invention, in the laser marking device according to the eighth or ninth aspect, the lock mechanism is rotatable about an axis and a first lock member rotatable integrally with the rotary operation member. A first lock member and a second lock member, the first lock member and the second lock member being connected to each other by a shaft so as to be rotatable with each other and having a concave portion, and a first lock member and a second lock member. It is characterized in that both of the recesses lock the swing of the pendulum by sandwiching the lowermost part of the pendulum or the projection at the lower end of the pendulum from the periphery.

According to an eleventh aspect of the present invention, in the laser marking device according to the tenth aspect, the first lock member or the second lock member has a concept that exceeds a conceivable point between the locked position and the unlocked position. A spring is applied so that the locked position and the unlocked position can be clearly understood.

According to a twelfth aspect of the present invention, in the laser marking device according to the eighth or ninth aspect, there is provided an operating member for turning on / off the laser unit. When the member turns on the laser unit, the pendulum is unlocked to allow swinging of the pendulum, and when the operating member turns off the laser unit, the pendulum is locked so as not to swing.

According to a thirteenth aspect of the present invention, in the laser marking device according to the first or eighth aspect, the pendulum has a bent portion near the lower end, and an electromagnetic braking force is provided below the bent portion. A braking plate is attached.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a laser marking device according to the present invention will be described with reference to the drawings. In FIGS. 1 to 5, the outer shape of the laser marking device 1 is a substantially disk-shaped base 31, a cabinet 21 placed on the upper side of the base 31, a top cabinet 23, and a lower part of the base 31. And a turntable base 25.

The base 31, cabinet 21, top cabinet 23 and turntable base 25
Are made of molded products such as synthetic resins. On the turntable base 25 provided below the base 31, three legs 200 are attached at equal intervals in the circumferential direction around the turntable base 25 in order to enhance stability when the laser marking device 1 is installed. Rubber legs 30 are attached to the lower ends of the legs 200 to prevent slippage.

On the upper surface side of the base 31, a tower 17 is mounted so as to stand vertically. The pendulum 8 is supported at the upper end of the tower 17 by a gimbal mechanism 201 having a two-axis configuration so that it can swing in all directions. Most of the pendulum 8 hangs down from the tower 17, and the laser unit 1 is attached to the upper end of the pendulum 8 immediately above the gimbal mechanism 201. Pendulum 8 is gimbal mechanism 2
The laser light emitted from the laser unit 1 at this time is maintained at a vertical position by 01, and is spread horizontally by an optical element described later.

Here, the configuration of the gimbal mechanism 201 will be briefly described. As shown in FIG. 10, the gimbal mechanism 201 has two axes 210 and 21 in directions orthogonal to each other.
One. Since the shaft 210 and the shaft 211 are held in the same configuration, the holding configuration of the shaft 210 will be mainly described.

One shaft 210 is horizontally supported by a support formed at the upper end of the tower 17. This axis 210
Ball bearings 21 with inner rings 213 fitted therein
A rocking body 215 is supported so as to be able to rock around a shaft 210 via the pins 4 and 214. Also, the other shaft 211 is the shaft 2
The pendulum 8 is supported by a rocking body 215 in a direction perpendicular to the axis 10 and swingably via two ball bearings (not shown) each having an inner ring fitted on the shaft 211.

A spacer 225 is interposed between the inner rings 213, 213 of the two bearings 214, 214,
Spacers 222 and 223 are also interposed between the outer sides of the inner rings 213 and 213 and an appropriate contact surface of the tower 17, respectively, and the inner rings 213 and 213 are fixed on the shaft 210. On the other hand, a preload spring 217 is interposed between the outer rings 216, 216 of the two bearings 214, 214, and the outer rings 216, 216 are urged by the preload spring 217 in a direction away from each other. Outer ring 216, 2
16 is fitted into the support hole of the rocking body 215,
The outer rings 216 and 216 are clearance fit so as to be movable with respect to the rocking body 215. However, the clearance between the outer races 216, 216 and the rocking body 215 is accurately finished so as to be as small as possible, so that no rattling occurs.

The other shaft 211 is also supported by the rocking body 215 by a similar support structure using two bearings, similarly to the support structure of the shaft 210, and the support holes of the pendulum 8 are fitted to the outer rings of the two bearings. And the pendulum 8 is
1 is swingably supported. FIG. 12 shows a part thereof. In FIG. 12, reference numeral 241 denotes an outer ring of the ball bearing, and reference numeral 242 denotes an inner ring of the ball bearing. The ball bearings are a pair of two, and their inner rings 242 are fitted and positioned on the outer periphery of the shaft 211, and the outer rings 241 are fitted in the support holes of the pendulum 8 by clearance fitting. A preload spring similar to the preload spring 217 is interposed between the outer rings of the two bearings, and biases the two outer rings away from each other.

The shaft 210 and the shaft 211 are mounted so that their axial directions are perpendicular to each other.
Is swingable about a shaft 210 in a vertical plane, and the pendulum 8 is swingable about a shaft 211 supported by a swing body 215 in a vertical plane. As a result, the pendulum 8 swings in all directions. Since it is movable, the laser unit 1 attached to the pendulum 8 can also swing in all directions.

As described above, the inner rings 213, 213 of the bearings 214, 214 constituting the gimbal mechanism are positioned by the spacers 222, 223, and
The outer races 216, 216 of 14, 14 are pushed outward by a preload spring 217. Therefore, the steel ball 219 of the bearing 214 comes into contact with the outside of the groove 220 of the inner ring 213 and the inside of the groove 221 of the outer ring 216, whereby the positioning is reliably performed, and the play between the inner ring 213 and the outer ring 216 of the bearing 214 is established. Can be eliminated.

As mentioned above, bearings 214, 214
The outer ring 216, 216 and the rocking body 215 have a clearance fit, and the bearings 214, 214 and the rocking body 215 cannot be relatively positioned as they are. The weight balance of the pendulum is lost, and the horizontal line is not accurate.

Therefore, as shown in FIG.
5, a U-shaped leaf spring 218 is screwed to the outer ring 21 of the bearing 214 by a pair of arms of the leaf spring 218.
6 is pressed against the outer surface. Since the two bearings 214 are paired, the leaf springs 218 are also fixed to both side surfaces of the rocking body 215 as two pairs, and press the outer rings 216 and 216 of the two bearings 214 and 214 from outside. Therefore, the outer races 216, 216 are urged away from each other by the interposition of the preload spring 217 therebetween, and the position thereof is regulated by the leaf springs 218, 218. Is kept in a fixed position. With the same configuration, the pendulum 8 is also maintained at a fixed position on the shaft 211. As shown in FIG. 12, a U-shaped leaf spring 243 is screwed to the side surface of the pendulum 8 near the shaft 211, and a pair of arms of the leaf spring 243 presses the outer surface of the outer ring 241 of the bearing. ing. A similar leaf spring is also attached to the opposite side surface of the pendulum 8, and its arm presses the outer surface of the outer ring of the bearing. In this way, the displacement of the outer rings 241 of the pair of bearings urged away from each other is regulated by the leaf spring 243, and the pendulum 8 is maintained at a fixed position.

As described above, the leaf spring 218 is disposed outside the outer ring 216 of the bearing 214 disposed on the shaft 210, and the outer ring 24 of the bearing disposed on the shaft 211.
By arranging the leaf spring 243 on the outside of the unit 1, the rocking body 215 and the pendulum 8 can be always positioned at a fixed position, and the position of the pendulum 8 can be prevented from shifting due to vibration or the like. The leaf spring 218 is a preload spring 2
A leaf spring having a spring constant weaker than 17 is used. This is because it is necessary to make a difference between the spring constants of the preload spring 217 and the leaf spring 218 in order to move the outer ring 216 to the other side with respect to the inner ring 213 of the bearing 214 to eliminate backlash. That is, assuming that the spring constant of the preload spring 217 is k1 and the spring constant of the leaf spring 218 is k2 (in the case of one leaf spring), k1> k2 or k1 <k2. That is, it is necessary to set a relationship that does not satisfy k1 = k2.

The support of the shaft 211 by the rocking body 215 is shown in FIG.
3. This is performed by using a wire spring 230 bent in a U-shape as shown in FIG. 11, 13, and 1
In FIG. 4, the rocking body 215 has walls rising from front and rear edges, and small holes 25 penetrate through walls 253 and 253 formed on the left and right sides on the rear side (upper side in FIG. 14).
2, 252 are formed. On the front wall of the rocking body 215, eave-shaped hook portions 251 are formed on both left and right sides. As shown in FIGS. 13 and 14, the wire spring 230 is folded near the center in the length direction to provide a folded portion 231. Further, the folded portion 231 is
As shown in FIG. 12B, the knob 232 is formed to be inclined and raised. The wire spring 230 is bent at 90 ° on the way from the knob 232 to the end thereof, and is bent in a U-shape.

The ends of the parallel portions of the wire spring 230 are inserted into the small holes 252, 252 of the rocking body 215, and the base portions of the parallel portions are the hook portions 25.
1, 251 is hooked from below. The central portions of the parallel portions of the wire spring 230 are flexed in the vertical direction by being placed on the shaft 211 partly dropped into the concave portion of the rocking body 215, and the central portions of the parallel portions are , Spacers 258, 25 fitted on shaft 211
8 is bent outward in the horizontal direction by hitting the outer end face. When the wire spring 230 bends in this manner, the shaft 2
11 is pressed against the concave portion of the rocking body 215 and is stably held, and the spacers 258 and 258 are urged in a direction approaching each other to be pressed against the inner ring 242 (see FIG. 12) of the pair of bearings. 211 and an inner ring 242 of a bearing substantially integral with the
It is stably held without changing the relative position with respect to.
Further, the attachment of the shaft 211 to the rocking body 215
It is only necessary to hook the U-shaped wire spring 230 at a predetermined position of the rocking body 215 in a state where the U-shaped wire spring is dropped into the concave portion of the rocking body 215. Further, the folded portion 231 of the wire spring 230 is bent obliquely so that the knob 2
By forming 32, the handling of the wire spring 230 is facilitated, and the workability in assembling the marking device can be improved.

The support of the shaft 210 by the scaffold 17 does not use a U-shaped wire spring as described above, but is the same in that a spring force is used. As shown in FIG. 10, both ends of the shaft 210 are dropped into predetermined recesses formed in the tower 17. Both ends of the shaft 210 protrude upward from the recess, and this protruding portion
As shown in FIG. 4, it is pressed from above by leaf springs 256 and 256 screwed to the upper end surface of the tower 17. The distal ends of the leaf springs 256, 256 are inserted into holes formed from the sides of the protrusion integrally formed with the tower 17, so that their positions are restricted and flexed in the vertical direction, and the shaft 210 is pressed against the recess. By biasing in the direction, the shaft 210 is stably held.

Next, an embodiment of a pendulum lock mechanism used when the laser marking device is not used will be described. When using a laser marking device, it is necessary to make the pendulum swing freely, but when not in use, it is necessary to lock the pendulum so that the pendulum does not swing unnecessarily. As shown in FIG. 1, a downward projecting portion 91 is formed integrally with the pendulum 8 at the lower end of the pendulum 8. The lock mechanism is performed by sandwiching the protruding portion 91 between the first lock member 151 and the second lock member 152. A switch knob 4 as a rotary operation member that can be operated from the outside is fixed to and integrated with an upper end of a center shaft 5 that is vertically arranged on the side of the tower 17. Therefore, when the switch knob 4 is rotated, the center shaft 5 is simultaneously rotated.

As shown in FIGS. 3 and 4, the first lock member 151 is composed of an arm 153 extending linearly and a key-like portion 154 extending substantially at a right angle from the middle of the arm 153. The arm 153 is provided with a protruding portion 155 on the side opposite to the side on which the key-shaped portion 154 is formed. Key part 154
Is provided with a concave portion 156 on the opposite side to the protruding portion 155. At a portion where the arm 153 and the key portion 154 intersect, a cylindrical hole 157 into which the center shaft 5 can be inserted is provided. One end of the idea spring 20 is connected to the tip of the arm 153, and the other end of the arm 153 is provided with a hole 159 that can be fitted to a projection 158 provided on the second lock member 152.
Is provided.

The second lock member 152 has a short arm 160
And a key-like portion 161 attached to the arm 160 at a substantially right angle
It consists of. On one end side of the arm 160, a protrusion 158 that can be fitted into a hole 159 provided in the first lock member 151 is provided. On the other end side of the arm 160, a key-shaped portion 161 is provided so as to project from the arm 160 at a substantially right angle. A concave portion 162 is provided on the arm 160 side of the key portion 161. At a portion where the arm 160 and the key-shaped portion 161 intersect, a projection 163 is provided below, and the projection 163 is fitted into a hole (not shown) provided on the base 31. The second lock member 1
52 is rotatable.

The first lock member 151 and the second lock member 152 are provided in a hole 159 provided in the first lock member 151 with a projection 15 provided in the second lock member 152.
8 are inserted and inserted into each other's recesses 156,
162 are arranged to face each other. The first lock member 151 and the second lock member 152 are arranged in different horizontal planes, and when the switch knob 4 is rotated, the first lock member 1 is pivotally connected to the hole 159 and the projection 158.
The respective recesses 156 and 162 are rotated in different directions while the relative rotation of the lock member 152 and the second lock member 152 is performed, so that the space formed by the recesses 156 and 162 is narrowed or expanded.

The hole 1 provided in the first lock member 151
57, the center shaft 5 is inserted and fixed.
The lock member 151 and the center shaft 5 rotate integrally. By turning the switch knob 4 attached above the center shaft 5 from the outside of the marking device as shown in FIG. 5, the first lock member 151 is rotated.
Rotates in a certain angular range. As described above, the second lock member 152 is pivotally connected to the first lock member 151 and is rotatable about the projection 163.
When the lock member 151 and the second lock member 152 rotate in opposite directions to each other, and when the concave portions 156 and 162 of both the first lock member 151 and the second lock member Recesses 156, 162
Thus, the protruding portion 91 provided at the lower end of the pendulum 8 is sandwiched from the periphery, and the pendulum 8 can be locked so as not to swing. Note that the lowermost part of the pendulum 8 may be directly sandwiched between the pendulums and the swing of the pendulum may be locked without providing the protrusion 91 at the lower end of the pendulum.

According to the present embodiment, the design spring 20 which exceeds the design point between the lock position and the unlock position is hung on one end of the first lock member 151. When the above point is exceeded, the urging direction of the lock member is reversed to generate a click feeling, and there is an advantage that the locked position and the unlocked position become clear. In addition, there is an advantage that the lock position and the lock release position become clear, and that the lock position and the lock release position are urged together so that a malfunction does not easily occur.

The first lock member 151 rotates about the center shaft 5 integrally with the center shaft 5, the second lock member 152 rotates about the shaft 163 with low frictional resistance, and the first lock member 151 rotates. Since the member 151 and the second lock member 152 are also connected to each other via the shaft 158 and the hole 159 so as to be rotatable with each other, the member 151 and the second lock member 152 rotate with low frictional resistance, and the amount of force required for operating the lock mechanism is small. There is an advantage that the performance is improved.

In the above-described embodiment, FIGS.
As shown in FIG. 5, the on / off operation of the laser unit 1 and the lock mechanism of the pendulum 8 are linked, and the switch knob 4 is rotated counterclockwise to move the first lock member 151 counterclockwise to the second lock member 151. By rotating the lock member 152 clockwise to the unlocked position of the pendulum, the protrusion 155 provided on the first lock member 151 contacts the power switch 19 as shown in FIG. The power is turned on. In the position where the pendulum is locked, the protruding portion 155 of the first lock member 151 is separated from the power switch 19 as shown in FIG. 3 to turn off the power.

Next, the braking mechanism of the pendulum 8 will be described. As shown in FIG. 1, a brake plate 9 is provided below the pendulum 8.
Are mounted so as to protrude in the horizontal direction by a brake plate set screw 10. A yoke 11 bent in a U-shape is screwed to the upper surface of the base 31. Magnets 12 and 12 are attached to the inner surfaces of the yoke 11 that are opposed to each other in the horizontal and parallel bent sides, respectively. This pair of magnets 12, 12
The brake plate 9 is arranged movably in a horizontal plane in a magnetic gap formed therebetween. That is, the yoke 1
1, a magnet 12, 12, and the above-mentioned brake plate 9 constitute a well-known magnetic damper.

Conventionally, as shown in FIG. 8, a metal plate 2 is attached to the lower end of a linear pendulum 205 which is suspended.
02 are mounted horizontally, and the magnets 12, 1 provided on the inner surfaces of the opposed vertical pieces 204, 204 of the U-shaped yoke 11.
The horizontal piece of the metal plate 202 is located in the magnetic gap between the two, and a magnetic gap is formed between the magnet 12 and the metal plate 202. However, in the conventional configuration as shown in FIG. 8, it is necessary to balance the entire pendulum 205 and the metal plate 202, and therefore, it is necessary to arrange the pendulum 205 at the center position of the metal plate 202. Therefore, a space in the horizontal direction is required for a distance L3 that is the sum of the horizontal distance L1 of the metal plate 202 and the run-out distance L2 of the metal plate 202, which hinders downsizing of the blackout device.

However, in the present embodiment, as shown in FIG. 9, the pendulum 8 is bent obliquely in the middle of its length to form a bent portion 206, and the lower end of the pendulum 8 is electromagnetically controlled. A metal plate 207 for obtaining power is mounted horizontally. The metal plate 207 has a width in the horizontal direction from the pendulum 8 and extends so as to be able to cope with the omnidirectional swing of the pendulum 8 about the two axes orthogonal to each other. The metal plate 207 is sandwiched between the upper and lower magnets 12,12. Pendulum 8
Are balanced so that, when the posture is taken in the vertical direction, the position of the center of gravity is located on the vertical center axis.

With such a configuration, even if the horizontal distance L4 of the metal plate 207 is the same as the horizontal distance L1 of the metal plate 202 of the conventional example shown in FIG.
The size of the inking device can be reduced. That is, at the lower end of the pendulum 8, the metal plate 207 is arranged so as to be offset to the overhang-shaped portion caused by the formation of the bent portion 206, and the U-shaped yoke 11 constituting the magnetic braking mechanism also moves Since it is possible to enter the hang-shaped portion, the horizontal distance L
This is because the horizontal space L6, which is the sum of the deflection distance L5 of the metal plate 207 and the metal plate 207, can be made smaller than the conventional horizontal space L3 shown in FIG.

In the present invention, when the pendulum 8 is fixed, a portion farthest from the rotation axis of the pendulum 8 is locked. That is, when the pendulum 8 is locked, the rotational moment M of the pendulum 8 can be expressed as M = lm, where l is the distance from the rotation center of the pendulum 8 to the point of application of the force, and m is the acting force. It can be seen that stopping the pendulum 8 at the position farthest from the rotation center has the smallest working force and the highest efficiency. Therefore, if the pendulum 8 is fixed at the lower end of the pendulum 8, the lock can be easily released even with a slight vibration, and the breakage of the lock mechanism can be reduced.

FIGS. 6 and 7 show an example of the horizontal line laser unit 1 which can be used in the present invention. The laser unit 1 includes a light emitting unit 300 and a rod lens 322 attached to a front opening of the light emitting unit 300. A laser diode 312 and a collimator lens 313 are housed in a holder 311 of the light emitting unit 300.
At the rear end, the drive circuit board 3 for the laser diode 312
14 are attached. The rod lens 322 is horizontally attached to the light emitting unit 300 via the lens holder 321 such that the axis thereof is perpendicular to the optical axis of the laser light emitted from the laser diode 312. The laser light emitted from the laser diode 312 is diffused light having an elliptical cross-sectional shape. The laser light is converted into a collimated light beam having a certain size by a collimator lens 313, and further extended only in a horizontal direction by a rod lens 322. Laser light.

The laser marking device may be used while mounted on the ground, or may be used by fixing it to a tripod. The tripod to which the laser marking device can be attached is a well-known tripod, which has a tripod pedestal and legs, and a general one in which a male screw is formed on the outer periphery of the main body fixing screw provided at the center of the tripod pedestal It is.
When the male screw portion provided on the tripod is screwed into the female screw portion 250 (see FIG. 1) provided on the blackout device, the central portion of the blackout device 1 is fixed by screwing the screws. Then, the rubber leg 30 of the leg 200 provided on the bottom surface of the inking device 1 is pressed against the tripod base. Thereby, the ink marking device main body 1
And the tripod are fixed.

The embodiment described above is configured as a laser marking device that draws a reference line in the horizontal direction, and the pendulum can swing in all directions by two axes orthogonal to each other. In particular, the gimbal mechanism that supports the pendulum swingably uses a ball bearing and applies preload to the gimbal mechanism. The pendulum is swingably supported by one axis and draws a vertical reference line. It is also applicable to a dispenser.

[0051]

According to the first aspect of the present invention, there is provided a pendulum swingably supported by a gimbal mechanism, and a laser unit attached to the pendulum. In a laser marking device that emits a level by irradiating an object, the gimbal mechanism has at least one shaft and at least two ball bearings, and inner rings of the two ball bearings are spaced at a predetermined distance from the shaft. Since the outer rings of the two ball bearings are urged away from each other or toward each other by a preload spring,
Positioning is ensured, and backlash between the inner and outer rings of the bearing can be eliminated.

According to the second aspect of the present invention, there is provided a pendulum swingably supported by a gimbal mechanism and a laser unit attached to the pendulum, and emits laser light from the laser unit to an object. In a laser marking device that emits a level by irradiation, the gimbal mechanism is
At least one shaft and at least two ball bearings, the inner rings of the two ball bearings are fitted on the shaft at a predetermined interval, and the outer rings of the two ball bearings are provided with a preload spring. Since the leaf springs are pressed to the outside of the outer rings of the two ball bearings and the pendulum is kept at a fixed position, the pendulum and the bearing can always be positioned at a fixed position. A mark-out line can be obtained without being affected by vibration or the like.

According to the third aspect of the present invention, there is provided a pendulum swingably supported by a gimbal mechanism and a laser unit attached to the pendulum, and emits laser light from the laser unit to an object. In a laser marking device that emits a level by irradiating, a gimbal mechanism has two axes perpendicular to each other, one of which is supported by a support and the other of which has an inner ring fitted on the axis. An oscillating body is supported via a bearing so as to be able to oscillate about the axis, the other axis is supported by the oscillating body in a direction orthogonal to the one axis, and an inner ring is fitted on this axis. The pendulum is swingably supported through the two ball bearings provided, and the outer rings of the two ball bearings fitted on the one shaft and the other shaft are preloaded. Because it is biased in a direction or orientation to approach each other away from each other by securely positioning is performed, it is possible to eliminate the backlash between the inner ring and the outer ring of the bearing.

According to the fourth aspect of the present invention, there is provided a pendulum which is swingably supported by a gimbal mechanism, and a laser unit attached to the pendulum, and emits laser light from the laser unit to an object. In a laser marking device that emits a level by irradiating, a gimbal mechanism has two axes perpendicular to each other, one of which is supported by a support and the other of which has an inner ring fitted on the axis. An oscillating body is supported via a bearing so as to be able to oscillate about the axis, the other axis is supported by the oscillating body in a direction orthogonal to the one axis, and an inner ring is fitted on this axis. The pendulum is swingably supported through the two ball bearings provided, and the outer rings of the two ball bearings fitted on the one shaft and the other shaft are preloaded. The leaf springs are pressed to the outside of the outer rings of the two ball bearings while the pendulum is maintained at a fixed position, so that the pendulum and the bearing can always be positioned at a fixed position, The marking device can obtain the marking line without being affected by vibration or the like.

According to the fifth aspect of the present invention, in the laser marking device according to the third or fourth aspect, one of the axes is
Because it is held down by a leaf spring and supported by the support, and the axial displacement is regulated, the pendulum and bearing can always be positioned at a fixed position, and the blackout device is not affected by vibration etc. A black line can be obtained.

According to the sixth aspect of the present invention, in the laser marking device according to the third or fourth aspect, the rocking member includes U
Both ends of the wire spring bent in the shape of a letter are hooked,
By pressing both ends of this wire spring against the other shaft, the other shaft is supported by the oscillator and the axial displacement is regulated, so that the shaft is securely supported by the oscillator and Axial displacement can be restricted.

According to the seventh aspect of the present invention, in the laser marking device according to the sixth aspect, the center portion of the wire spring is folded, and the folded portion is raised obliquely to form a knob. Therefore, the handling of the wire spring is facilitated, and the workability in assembling the marking device can be improved.

According to the eighth aspect of the present invention, there is provided a laser marking device which emits a laser beam which spreads in a horizontal direction and irradiates an object with a laser, and has a laser unit, which is swung back and forth and right and left by a gimbal mechanism. Because it has a pendulum that is supported as possible and a lock mechanism that locks the pendulum's front and rear and left and right swings by sandwiching the bottom of the pendulum from the surroundings,
The pendulum can be held securely, and failure of the inking device which occurs during transportation or the like can be prevented.

According to the ninth aspect of the present invention, in the laser marking device according to the eighth aspect, the pendulum integrally has a downward projecting portion at a lower end thereof, and the lock mechanism sandwiches the projecting portion from the periphery thereof. Locks the pendulum back and forth and left and right, so the pendulum can be stopped at the position farthest from the center of rotation, and the pendulum can be held efficiently, so the lock can be easily released even with slight vibration. , The lock will not break.

According to the tenth aspect, the eighth aspect is provided.
Or the laser marking device according to 9, wherein the lock mechanism has a first lock member rotatable integrally with the rotary operation member, and a second lock member rotatable about an axis,
The first lock member and the second lock member are connected to each other by a shaft so as to be rotatable with each other, and have a concave portion. The concave portions of both the first lock member and the second lock member are located at the lowermost part of the pendulum The first lock member and the second lock member rotate around an axis with low frictional resistance to lock the swing of the pendulum by sandwiching the protrusion at the lower end of the pendulum from the periphery, and the first lock member The second lock member and the second lock member are also connected to each other by a shaft so as to be rotatable with each other, so that they rotate with low frictional resistance, and there is an advantage that the amount of force required for operating the lock mechanism is small and operability is improved. .

According to the eleventh aspect of the present invention, the first aspect is provided.
In the laser marking device described in Item 0, a thought spring that exceeds a thought point between the lock position and the unlock position is applied to the first lock member or the second lock member, and the lock position and the unlock position are clear. Therefore, it is possible to have a click feeling due to the elastic force of the conceivable spring, and to make it difficult for malfunction to occur.

According to the twelfth aspect, the eighth aspect is provided.
Or the laser marking device according to 9 above, further comprising an operation member for turning on / off the laser unit, the operation member being interlocked with a lock mechanism, and unlocking the pendulum when the operation member turns on the laser unit. The swing of the pendulum is allowed, and the pendulum is locked so as not to swing when the operation member turns off the laser unit, so that the power supply of the ink marking device can be used effectively.

According to the thirteenth aspect of the present invention, the first aspect
In the laser marking device described in Item 8, the pendulum has a bent portion near the lower end, and a brake plate for obtaining an electromagnetic braking force is attached below the bent portion. In comparison with the above, the braking space for the pendulum can be reduced, and the size of the blackout device can be reduced.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of a laser marking device according to the present invention.

FIG. 2 is a front sectional view showing the laser marking device with the lower portion omitted.

FIG. 3 is a plan view of a lock mechanism of the laser marking device;

FIG. 4 is a plan view showing another operation mode of the lock mechanism of the laser marking device.

FIG. 5 is a plan view showing the appearance of the embodiment.

FIG. 6 is a plan view showing an example of a laser unit that can be used in the present invention.

FIG. 7 is a side sectional view of the laser unit;

FIG. 8 is a side view showing an example of a pendulum used for a conventional laser marking device.

FIG. 9 is a side view showing an example of a pendulum that can be used in the laser marking device according to the present invention.

FIG. 10 is a cross-sectional view showing an example of a bearing of a gimbal mechanism that can be used in the laser marking device according to the present invention.

FIG. 11 is a front view showing an oscillating body of the gimbal mechanism and a shaft part for oscillatingly supporting the oscillating body.

FIG. 12 is a side view showing a pendulum of the gimbal mechanism and a shaft part for swingably supporting the pendulum.

FIGS. 13A and 13B are examples of a wire spring that can be used in a gimbal mechanism that can be used in the laser marking device according to the present invention; FIG.

FIG. 14 is a plan view of a portion of the gimbal mechanism.

[Explanation of symbols]

 Reference Signs List 1 laser unit 8 pendulum 201 gimbal mechanism 210 shaft 213 inner ring 214 ball bearing 216 outer ring 217 preload spring

Claims (13)

[Claims] 1. A laser pen having a pendulum supported by a gimbal mechanism so as to be capable of swinging, and a laser unit attached to the pendulum. In the dispenser, the gimbal mechanism has at least one shaft and at least two ball bearings, and inner rings of the two ball bearings are fitted on the shaft at a predetermined interval; Wherein the outer ring is biased in a direction away from each other or toward each other by a preload spring. 2. A laser pen having a pendulum supported by a gimbal mechanism so as to be capable of swinging, and a laser unit mounted on the pendulum. In the dispenser, the gimbal mechanism has at least one shaft and at least two ball bearings, and inner rings of the two ball bearings are fitted on the shaft at a predetermined interval; A preload spring is interposed between the outer rings of the two ball bearings to urge them away from each other, and a leaf spring is pressed to the outside of the outer rings of the two ball bearings to keep the pendulum at a fixed position. A laser marking device characterized by the following. 3. A laser ink having a pendulum supported by a gimbal mechanism so as to be capable of swinging, and a laser unit attached to the pendulum. In the dispenser, the gimbal mechanism has two axes orthogonal to each other, and one of the axes is supported by a support, and the rocking body is supported by two ball bearings having an inner ring fitted on the axis. The other shaft is supported so as to be swingable about the shaft, and the other shaft is supported by the rocking body in a direction orthogonal to the one shaft and is provided with two ball bearings having an inner ring fitted on the shaft. The pendulum is swingably supported, and the outer rings of the two ball bearings fitted on the one shaft and the other shaft are moved away from each other by a preload spring. Kimata the laser marker, characterized in that it is biased in a direction to approach each other. 4. A laser ink which has a pendulum supported by a gimbal mechanism so as to be swingable, and a laser unit attached to the pendulum, and emits a laser beam from the laser unit to irradiate an object to set a level. In the dispenser, the gimbal mechanism has two axes orthogonal to each other, and one of the axes is supported by a support, and the rocking body is supported by two ball bearings having an inner ring fitted on the axis. The other shaft is supported so as to be swingable about the shaft, and the other shaft is supported by the rocking body in a direction orthogonal to the one shaft and is provided with two ball bearings having an inner ring fitted on the shaft. The outer ring of each of the two ball bearings fitted on the one shaft and the other shaft is separated from each other by a preload spring interposed therebetween. Laser marker, wherein said two on the outside of the ball bearing outer ring which are pressed each plate spring pendulum is maintained at a fixed position while being biased in the direction that. 5. The laser marking device according to claim 3, wherein the one shaft is supported by a supporting member while being pressed by a leaf spring, and the axial displacement is regulated. 6. Both ends of a wire spring bent in a U-shape are latched on said rocking body, and both ends of said wire spring press the other shaft, whereby said other shaft swings. The laser marking device according to claim 3 or 4, wherein the laser marking device is supported by the moving body and the displacement in the axial direction is regulated. 7. The laser marking device according to claim 6, wherein the wire spring has a central portion folded back, and the folded portion rises obliquely to form a knob. 8. A laser marking device that emits a laser beam extending in a horizontal direction and irradiates an object to emit a level, comprising: a pendulum having a laser unit and supported by a gimbal mechanism so as to swing back and forth and left and right; A laser marking device having a lock mechanism that locks the pendulum from swinging back and forth and right and left by sandwiching the lowermost portion of the pendulum from the periphery. 9. The laser marking according to claim 8, wherein the pendulum has a downwardly projecting portion integrally at a lower end thereof, and the lock mechanism sandwiches the projecting portion from the periphery thereof to lock the swing of the pendulum from front to back and left and right. vessel. 10. A lock mechanism comprising: a first lock member rotatable integrally with a rotation operating member; and a second lock member rotatable about an axis. The lock members of the first and second lock members are connected to each other by a shaft so as to be rotatable with each other, and the recesses of both the first lock member and the second lock member surround the lowermost portion of the pendulum or the protrusion at the lower end of the pendulum. The laser marking device according to claim 8, wherein the swinging movement of the pendulum is locked by being sandwiched between the two. 11. A conceivable spring which exceeds a conceivable point between the lock position and the unlock position is applied to the first lock member or the second lock member so that the lock position and the unlock position can be clearly understood. The laser marking device according to claim 10, wherein 12. An operating member for turning on / off the laser unit, the operating member being interlocked with a lock mechanism, and unlocking the pendulum when the operating member turns on the laser unit to swing the pendulum. 10. The laser marking device according to claim 8, wherein the pendulum is locked so as not to swing when the operation member turns off the laser unit. 13. The laser marking device according to claim 1, wherein the pendulum has a bent portion near the lower end, and a brake plate for obtaining an electromagnetic braking force is attached to a lower portion of the bent portion.