JP4009175B2 - Laser marking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a laser marking device suitable for use in marking work on walls, ceilings, or floors in civil engineering, construction sites, and the like.
[0002]
[Prior art]
The ink marking device is used for so-called ink marking work that marks and displays the intersection line over the wall surface and ceiling surface at any point in the horizontal plane such as the floor at construction sites such as civil engineering and architecture, Such work requires a quick and accurate display.
[0003]
In recent years, in order to cope with these demands in the ink marking work, laser marking machines that emit laser beams from laser projection units and immediately form horizontal lines, vertical lines, or cross lines on the wall or ceiling are frequently used. (For example, refer to Patent Document 1 and Patent Document 2).
[0004]
[Patent Document 1]
JP-A-9-178483.
[0005]
[Patent Document 2]
JP 2001-129482 A.
[0006]
By the way, the conventional laser marking device has the following problems, and the solution is desired.
[0007]
1. A laser projector that emits a beam that forms a horizontal line or a vertical line has a structure that is installed on a frame (oscillator) that is swingably held by a column of a sumper. Many have a left-right asymmetric shape mainly composed of die-cast molded products, and some can support in a cantilevered state. When the frame expands or contracts due to temperature changes, a laser projector is installed. There is a possibility that the position may fluctuate and the horizontal and vertical lines cannot be formed accurately.
[0008]
2. When attaching the laser projector to the frame, in order to eliminate deviations in the angle of the optical axis of the laser and the height (or position) of the projection source, the projection is made by the gap between the attachment screw (male screw) and the screw hole through which this screw passes. It is necessary to make fine adjustments to move the container up and down, left and right on the base of the frame, and this adjustment takes a lot of time.
[0009]
3. The frame is suspended and supported by a cross shaft attached to the shaft connecting block so that the major axis and the minor axis cross each other so that it can swing back and forth and left and right, but each axis constituting the cross axis is its main body. It is common to lock the tip of the lock screw screwed into the shaft connection block with the shaft connection block and lock it to the shaft connection block. At that time, it is difficult to assemble because alignment of the shaft recess and the tip of the lock screw is required.
[0010]
4). An opening for allowing the laser emitted from the laser projector to pass through is formed in the cover of the ink discharger, and glass is disposed in the opening. The glass is formed by pressing or injection molding. It is common to hold it by screwing it between the cover with a plate, or by fixing the glass directly by adhering the glass to the cover. In such a fixed holding system, for example, glass breakage When it is necessary to replace the screw, etc., it takes time to attach and detach the screw. If the glass is directly bonded to the cover, more troublesome work is required.
[0011]
5). The frame is provided with a brake plate at its lower end, and is configured so that the swing of the frame can be quickly damped by applying the magnetic force of the magnet to the brake plate. In particular, flat objects are arranged horizontally, and when the brake plate is tilted when the frame is swung, the distance between the magnet and the magnet changes.
[0012]
[Problems to be solved by the invention]
An object of the present invention is to propose a novel laser marking device capable of solving the above-mentioned problems that the conventional laser marking device has.
[0013]
[Means for Solving the Problems]
The present invention relates to a laser projection unit capable of emitting at least one beam of a horizontal line, a vertical line, a cross line, and a reference point, a frame that holds the laser projection unit, and a support column that stands on the frame. A laser marking device comprising: a cross shaft that suspendably supports the front, rear, left, and right; and a laser irradiation unit, a frame, and a cover that covers the cross shaft .
The frame includes left and right symmetrical support members that sandwich the laser projection unit from both sides, a pedestal that fixes and holds a laser irradiation unit that is integrally formed with the support members and forms a vertical line, and a laser that forms a horizontal line. It consists of a pedestal that holds and holds the irradiation unit.
The laser projection unit has a positioning member that determines the position by rotating on the base of the frame,
The cross shaft includes a shaft connecting block, a short shaft that is screwed to the shaft connecting block and suspends and supports the frame so as to be swingable to the left and right with respect to the connecting block, and a shaft connecting block in a direction perpendicular to the short shaft. It consists of a long shaft that is screwed to the frame and supports the frame so that it can swing back and forth together with the shaft connecting block.
Each of the short shaft and the long shaft has an annular groove for positioning with respect to the shaft connecting block at the center in the length direction,
The cover forms an opening through which the beams emitted from the laser projection unit pass through each other and holds a dustproof glass that separates the inside and outside of the case at the opening. Become
A brake plate having a rear end bent at an angle approximate to a locus arc drawn when the frame is swung in the front-rear direction is disposed at the lower end of the frame, and the rear of the brake plate is placed on the base of the laser marker. At least one magnet that is provided facing the end portion and applies a braking force to the braking plate by the magnetic force to suppress the swing of the frame is disposed,
The brake plate is a laser marking device characterized in that it has a width center that coincides with the center in the length direction of one of the cross shafts that swing the frame in the front-rear direction.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described more specifically with reference to the drawings.
[0019]
1 to 5 are views showing an embodiment of a laser marking device according to the present invention with a cover removed, and FIG. 6 is a cross-sectional view with a cover attached.
[0020]
1 to 6, number 1 is the base of the laser marking device, 2 is a column upright on the base 1, 3 is a laser projection unit that can emit a beam forming a vertical line V, 4 is a horizontal line H It is a laser projection unit that enables emission of a beam to be formed.
[0021]
Reference numeral 5 denotes a frame for fixing and holding the laser projection units 3 and 4, and 6 denotes a cross shaft. The cross shaft 6 is composed of a short shaft 6a and a long shaft 6b and a shaft connecting block 6c that is screwed in a direction orthogonal to each other. The cross shaft 6 causes the frame 5 to move back and forth at the top of the column 2 (in the X direction in the figure). ) Suspended and supported so as to be swingable left and right (Y direction in the figure).
[0022]
A brake plate 7 is provided at the lower end of the frame 5 and can swing with the frame 5. The brake plate 7 has a rear end portion 7a bent at an angle approximate to each trajectory arc when the frame 5 swings in the front-rear direction, and has a width center that coincides with the center in the length direction of the short shaft 6a. Have.
[0023]
Further, 8 is a magnet which is arranged so as to sandwich the rear end portion 7a of the brake plate 7 with a gap therebetween, and applies a braking force to the brake plate 7 to suppress the swing of the frame 5.
[0024]
7A to 7D are views showing only the frame 5 taken out. The frame 5 includes a support member 5a that is symmetrical on the left and right sides, a pedestal 5b that is integrally formed on the support member 5a and that holds the laser projection unit 3 that forms the vertical line V, and a laser projection unit that forms the horizontal line H. The laser projection units 3 and 4 are arranged on the pedestals 5b and 5c so as to be sandwiched by the support member 5a, and thereby the frame 5 expands (or contracts) due to a temperature change or the like. Even if this happens, the left and right elongation rates (or shrinkage rates) are almost the same, so there is almost no error in the horizontal and vertical lines, and it is easy to balance the left and right during assembly.
[0025]
FIGS. 8A to 8D show cases (line tubes) 3a and 4a of the laser projection units 3 and 4, respectively. The cases 3 a and 4 a are provided with convex portions 3 b and 4 b as positioning members that fit into holes h formed in the frame 5.
[0026]
When the laser projection units 3 and 4 are attached to the frame 5 so that accurate vertical lines and horizontal lines can be formed, the ink discharger having a general structure, the angle of the laser optical axis and the projection source In order to eliminate the deviation of the height (or position), it is necessary to finely adjust the case 3a, 4a on the pedestal 5b, 5c as appropriate by the gap between the mounting screw (male screw) and the screw hole through which this screw passes. Although the adjustment takes a lot of time, in the present invention, as shown in FIGS. 8A to 8D, the protrusions provided on the cases 3a and 4a of the laser projection units 3 and 4 are provided. The parts 3b and 4b are fitted into the holes h of the frame 5, and the case 3a and 4a are appropriately rotated on the bases 5b and 5c of the frame 5 around the convex parts 3b and 4b, so that an accurate vertical line and horizontal Where the line is formed Since the laser projection units 3 and 4 are respectively screwed, and the height (position) of the laser projection source is always constant, adjustment work when the laser projection units 3 and 4 are fixed and held is simplified. Can be done.
[0027]
The hole h of the frame 5 and the protrusions 3b and 4b of the cases 3a and 4a may be provided in advance at positions corresponding to the center of the laser light emitting unit when the laser projection units 3 and 4 are fixedly held on the frame 5. This makes the adjustment work even easier.
[0028]
FIG. 9 is an exploded view of the appearance of the cross shaft 6 suitable for use in the ink discharger of the present invention. The short shaft 6a and the long shaft 6b are respectively provided with annular grooves m ₁ and m ₂ having a v-shaped cross-section at the center in the length direction, and the shafts 6a and 6b are respectively connected to the through holes of the shaft connecting block 6c. It is possible to simply position and fix the locking screws r ₁ and r ₂ by fitting them into the annular grooves m ₁ and m ₂ , thereby facilitating accurate assembly of the cross shaft 6.
[0029]
FIG. 10 shows the appearance of a cover 9 suitable for use in the ink discharger of the present invention. The cover 9 can be divided into two cover bodies 9a and 9b each having a notch c as shown in FIG. 11, and these cover bodies 9a and 9b are mutually connected as shown in FIG. Thus, an opening H through which the beams emitted from the laser projection units 3 and 4 pass is formed.
[0030]
As shown in FIG. 11, a groove portion 10 is formed around the notch c on the inner surface of each cover body 9 a, 9 b, and a dust-proof glass 11 is inserted into the groove portion 10.
[0031]
One end of the glass 11 is inserted into one of the groove portions of the cover bodies 9a and 9b, and the other end of the glass 11 is inserted into the groove portion 10 of the other cover bodies 9a and 9b when the cover bodies 9a and 9b are aligned. It can be attached, and the inside and outside of the case are surely separated by the glass 11.
[0032]
In the normal fixing method, where the glass is fixed with a holding plate or fixed directly by attaching the glass to the cover, it takes time to attach and detach the screws when the glass needs to be replaced due to breakage of the glass, etc. In the case of a cover directly adhered to the cover, more troublesome work is required, but in the cover having the structure shown in FIGS. 10 and 11, the cover bodies 9a and 9b can be separated from each other or put together. The glass 11 can be attached and detached, and an extra member such as a pressing plate is not required.
[0033]
FIGS. 12A and 12B are views showing the brake plate 7 arranged at the lower end of the frame 2. The brake plate 7 has an opening 7b at the center thereof. The lower end of the frame 5 is inserted into the opening 7b and a screw is screwed into the hole 12 to connect the brake plate 7 and the frame 2. The rear end portion 7a is bent at an angle θ that approximates the locus arc when the frame 5 swings in the front-rear direction, and the magnet 8 is disposed facing the rear end portion 7a. Regardless of the position of the brake plate 7 due to the swing, the distance to the magnet 8 is substantially constant, so that a stable braking force can be obtained.
[0034]
In order to keep the distance between the brake plate 7 and the magnet 8 constant regardless of the swing of the frame 5, the brake plate 7 can be formed in a spherical shell shape. There are disadvantages. As described above, if the rear end portion 7a of the brake plate 7 is bent at an angle θ approximated to a locus arc when the frame 5 is swung in the front-rear direction (X direction), the processing is relatively simple. In addition, since the distance between the brake plate 7 and the magnet 8 is short, a sufficient braking force can be obtained even if the magnet 8 has a weak magnetic force, and it is possible to reduce the thickness of the magnet with the same magnetic force. The overall size of the ink discharger can be reduced.
[0035]
In the embodiment of the present invention, the inking device including a laser projection unit capable of forming a horizontal line and a vertical line has been described. However, even a projector equipped with a projection unit that forms a cross-line or dot-like reference can be used. Well, this is not a limitation.
[0036]
【The invention's effect】
According to the present invention, the following effects can be expected.
[0037]
The frame for fixing and holding the laser projection unit has a symmetric support member that sandwiches and fixes the unit from both sides, so that the beam can be accurately emitted even if the frame expands or contracts due to temperature changes. .
[0038]
In addition, according to the present invention, the positioning of the laser projection unit with respect to the frame can be performed only by rotating the laser projection unit with the positioning member as the center, and the assembly and adjustment work of the inking device is facilitated.
[0039]
The cross shaft that holds the frame in a swingable manner has an annular groove in the center in the length direction for both the short and long axes, so positioning and mounting of each axis with respect to the shaft coupling block is highly accurate. Easy to do.
[0040]
The dust-proof glass attached to the opening of the cover can be attached to the groove of the cover body by fitting the cover body, so it is easy to attach and remove, and an extra member such as a press plate is also required And not.
[0041]
The brake plate 7 has its rear end bent at an angle approximating the locus arc when the frame 2 swings in the front-rear direction, and the magnet is arranged facing the rear end so that the frame 2 Regardless of the position of the brake plate 7 due to the swing, the distance to the magnet 8 is almost constant, so that a stable braking force can be obtained, and the distance between the brake plate and the magnet is reduced. Therefore, it is possible to reduce the manufacturing cost.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a laser marking device according to the present invention.
FIG. 2 is a diagram showing the front of FIG.
FIG. 3 is a diagram showing a right side surface of FIG. 1;
FIG. 4 is a view showing a back surface of FIG. 1;
FIG. 5 is a diagram showing a plan view of FIG. 1;
FIG. 6 is a view showing a cross section of the inking device shown in FIG. 1 with a cover attached.
FIGS. 7A to 7D are diagrams showing a single frame taken out. FIG.
8A to 8D are diagrams showing a case of a laser projection unit.
FIG. 9 is an external perspective view of a cross shaft.
FIG. 10 is a view showing an appearance of a cover.
11 is an exploded view of the cover shown in FIG.
FIGS. 12A and 12B are views showing a brake plate. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 Support | pillar 3 Laser projection unit 3a Case 4 Laser projection unit 4a Case 5 Frame 5a Support member 5b Base 5c Base 6 Cross shaft 6a Short shaft 6b Long shaft 6c Axis connection block 7 Brake plate 7a Rear end 7b Opening 8 Magnet 9 Cover 9a Cover body 9b Cover body 10 Groove portion 11 Dust-proof glass h Hole c Notch r ₁ Lock screw r ₂ Lock screw

Claims (1)

A laser projection unit capable of emitting at least one beam of a horizontal line, a vertical line, a cross line, and a reference point, a frame that holds the laser projection unit, and a support that stands up on the frame, A laser ink dispenser comprising a cross shaft that swingably supports each of the shafts, and a laser irradiation unit, a frame, and a cover that covers the cross shaft .
The frame includes left and right symmetrical support members that sandwich the laser projection unit from both sides, a pedestal that fixes and holds a laser irradiation unit that is integrally formed with the support members and forms a vertical line, and a laser that forms a horizontal line. It consists of a pedestal that holds and holds the irradiation unit.
The laser projection unit has a positioning member that determines the position by rotating on the base of the frame,
The cross shaft includes a shaft connecting block, a short shaft that is screwed to the shaft connecting block and suspends and supports the frame so as to be swingable to the left and right with respect to the connecting block, and a shaft connecting block in a direction perpendicular to the short shaft. It consists of a long shaft that is screwed to the frame and supports the frame so that it can swing back and forth together with the shaft connecting block.
Each of the short shaft and the long shaft has an annular groove for positioning with respect to the shaft connecting block at the center in the length direction,
The cover forms an opening through which the beams emitted from the laser projection unit pass through each other and holds a dustproof glass that separates the inside and outside of the case at the opening. Become
A brake plate having a rear end bent at an angle approximate to a locus arc drawn when the frame is swung in the front-rear direction is disposed at the lower end of the frame, and the rear of the brake plate is placed on the base of the laser marker. At least one magnet that is provided facing the end portion and applies a braking force to the braking plate by the magnetic force to suppress the swing of the frame is disposed,
The laser marking device, wherein the brake plate has a width center that coincides with a center in a length direction of one of the cross shafts that swing the frame in the front-rear direction.

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