JP3635222B2 - Upper illumination device in cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an upper illumination device used when centering a mark attached to an edge of a workpiece as a pre-work before cutting.
[0002]
[Prior art]
Conventionally, when performing image processing such as binarization or multi-leveling on the mark attached to the edge of a workpiece to be cut by a cutting device, the cutting blade 1 can be moved up and down as shown in FIG. The upper illumination device C is mounted together with the CCD camera 4 on the fixed frame 8 that guides the support 3 of the supporting cutting blade holder 2 and guides the cutting blade 1 formed on the stripper 6 from the upper illumination device C toward the workpiece W. Light is projected from the visual field space 16 communicating with the hole 26, the reflected light is imaged by the CCD camera 4, and the imaged data is analyzed by an image processing device (not shown).
These upper illumination devices C are composed of an illumination unit using a halogen lamp as a light source and an optical cable (a bundle of optical fibers) (not shown) connected to the illumination unit. Light is projected toward a mark M provided on a so-called workpiece W such as a sheet.
[0003]
However, in the case of this upper illumination device, since the illumination unit is mounted around the CCD camera 4 and is separated from the stripper 6, the light projection path is easily disturbed by other equipment and the like is avoided. Therefore, it is necessary to relocate the equipment and related equipment to another place, which causes an increase in the size of the cutting device itself.
Further, since light is projected from a fixed location around the CCD camera, a reflected image from a fixed direction is received. However, depending on the workpiece material (reflectance level), color (density and type), mark color (density and type) attached to the workpiece, shape, etc., the direction and angle of illumination and the illuminance In reality, it is not possible to obtain a clear binary image or multi-valued image of the mark attached to the work unless the above is adjusted.
In addition, in the upper illumination device using a halogen lamp as a light source, the illumination device itself including the optical cable (bundle of optical fibers) together with the unit of the halogen lamp is expensive, and the work is thermally strained by the light projected from the halogen lamp. There is also a problem that a precise cutting process cannot be expected.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described conventional circumstances, and an object thereof is to provide an upper illumination device that does not cause an increase in size of the cutting device itself.
Other purposes are suitable for the workpiece material (high or low reflectivity) and color (density and type), mark color (density and type) attached to the workpiece, and its shape. An object of the present invention is to provide an upper illumination device of a cutting device suitable for obtaining a clear binary image or multi-valued image by projecting a mark with a light projection direction or illuminance.
Still another object of the present invention is to provide an upward illumination device for a cutting device that is simple and inexpensive.
[0005]
[Means for Solving the Problems]
The technical means taken in order to solve the above-mentioned problem is as claimed in claim 1, wherein the light source is assembled to at least a portion surrounding the visual field space of the stripper having the guide hole of the cutting blade and the visual field space of the CCD camera communicating therewith. A plurality of light source arrangement parts are provided at intervals, and the light source arrangement part is provided with a projection hole or a transmission part from the light source at the bottom of the stripper.
[0006]
According to this technical means, light is projected toward a mark immediately below the projection hole and the transmission part at the bottom of the light source arrangement part provided at intervals in the part surrounding the visual field space of the CCD camera.
[0007]
The gist of the second aspect is to control the illuminance adjustment and lighting / extinguishing of the light source according to the first aspect.
[0008]
According to this technical means, a clear 2 is selected according to the material (high or low reflectance) and color (density and type) of the workpiece, the color (density and type) of the mark attached to the workpiece, and the shape thereof. The illuminance adjustment of the light source and lighting / extinguishing are controlled so that a digitized image, a multivalued image, etc. can be obtained.
[0009]
The gist of claim 3 is that the light source of claim 1 or 2 is an LED.
[0010]
According to this technical means, gentle cold light is projected toward the workpiece.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a main part of an embodiment of the upper illumination device in the cutting device of the present invention.
[0012]
In this cutting apparatus A, each time the support 3 having a cutting blade holder 2 that supports the cutting blade 1 so as to be movable up and down is intermittently fed to a fixed interval, the CCD camera 4 is obliquely upward on both sides of the cutting blade 1. A linear mark M provided at equal intervals in parallel along the edge of the workpiece W placed and fixed (vacuum fixed) on the index table 5 is imaged, and the image data is processed by an image processing device (not shown). ) To perform image processing (binarization, multi-value conversion, etc.), center the image, correct the index table 5 in the θ direction using the centering data, and then move the cutting blade holder 2 downward. It is configured to cut between the left and right marks M and M, and is configured so that the work W is lightly held between the index table 5 before the stripper 6 forming the visual field space 16 of the CCD camera 4 is cut by the cutting blade 1. Traditionally It has a structure of knowledge.
[0013]
The stripper 6 is made of aluminum in the present embodiment, and contacts the workpiece W before the cutting blade 1 is lowered, and holds the workpiece W lightly with the index table 5 so as not to move. Is lowered and cut, and is further biased by a spring 7 so as to continue to be held until the cutting blade 1 is pulled out of the workpiece W. The visual field space 16 is formed by a through hole that is opened in communication.
[0014]
In addition, a light source arrangement portion 36 for assembling a plurality of light sources B is formed in a penetrating manner in a portion surrounding the visual field space 16.
In the present embodiment, the light source arrangement portion 36 is a plurality of independent holes that are opened at equal intervals as shown in the figure. The independent holes are inclined downward in the direction of the visual field space 16. A lamp-type or chip-type LED is attached to each of the independent holes as a light source B so that light can be projected downward.
The light source arrangement portion 36 may be a substantially annular hole instead of an independent hole, and the bottom of the stripper serves as a projection hole 36a from the light source.
Further, although six light source arrangement portions 36 are formed in FIG. 1, it is needless to say that four, five, or six or more light source arrangement portions 36 may be used.
[0015]
Further, in the present embodiment, the light source arrangement portion 36 formed of independent holes at equal intervals so as to sandwich the guide hole 26 as illustrated in the end region of the guide hole 26 communicating with the visual field space 16. And a lamp-type or chip-type LED is attached as the light source B to the light source arrangement portion 36.
This light source arrangement part 36 is an independent hole opened at equal intervals in the present embodiment, and each independent hole is formed in a downward inclined shape toward the guide hole 26. Similarly to the above, a lamp-type or chip-type LED is mounted on the portion 36 so as to be able to project downward, and is projected from the projection hole 36a at the bottom.
[0016]
The upper illuminating device in the cutting apparatus A configured as described above is a projection of the light source disposition unit 36 disposed so as to surround the bottom of the stripper 6, that is, the visual field space 16 in contact with the workpiece W. Cold light from the LED is projected toward the mark M from the hole 36a.
The reflected light is used to capture an image with the CCD camera 4, and the captured image data is processed with the image processing apparatus as described above to center the mark M, and the index table 5 is corrected in the θ direction based on the centering data. After the movement, the cutting blade holder 2 is moved downward to cut the workpiece W between the marks M.
[0017]
In the present invention, the clearness of the mark M depends on the material (reflectance level) and color (density and type) of the workpiece W, the color (density and type) of the mark M attached to the workpiece W, its shape, and the like. It is possible to control the illuminance adjustment of the light source (LED) B and the light source (LED) B to be turned on / off so that a processed image can be obtained.
Even in the case of an LED, it is possible to adjust the illuminance by changing the current with a variable resistor.
Also, experimental data is obtained for each condition such as the material and color of the workpiece W, the color and shape of the mark M, and the data for obtaining a clear binary image, multi-valued image, etc. is executed under the above conditions. It may be stored in a selectable manner in a ROM of a control device (controller) (not shown) so that it can be selected as a mode.
[0018]
Further, as described above, the light source arrangement portion 36 is formed at equal intervals also in the end region of the guide hole 26 communicating with the visual field space 16, and the light source arrangement portion 36 has a lamp type or chip as the light source B. Since the LED of the type is attached, as shown in FIG. 3, the mark attached to the work W (indicated by a two-dot chain line) having a shorter width than the width between the field spaces 16 on both sides of the stripper 6 M image processing can also be performed.
[0019]
Further, the projection hole 36a may be closed with a transmissive material, and the light projection from the light source may be projected toward the mark through the transmissive portion.
[0020]
【The invention's effect】
Since the present invention is configured as described above, it has the following advantages.
(Claim 1) Since the stripper is provided with a light source arrangement portion, and the light source arrangement portion projects light from the bottom of the stripper toward the mark attached to the workpiece, the light projection path is different from the conventional one. There is no risk of being blocked by equipment. Therefore, it is not necessary to relocate the equipment and related equipment so as to avoid it, and the cutting apparatus itself is not increased in size.
In addition, the reflectivity of the workpiece differs depending on the material and color, and the color and shape of the mark are related to it. In many cases, it is very difficult to obtain, but because the illumination intensity of the light source and the lighting / extinguishing control are controlled, the workpiece material (reflectance level), color (concentration, type), and workpiece It is possible to create a better reflective atmosphere in which a clear binarized image, multi-valued image, etc. can be obtained according to the color (density, type) of the attached mark, its shape, and the like.
In addition, since it approaches the mark on the workpiece, not only the amount of light is reduced, but the LED does not generate heat and does not affect the workpiece with heat.
[Brief description of the drawings]
FIG. 1 is an enlarged perspective view of a stripper portion in a cutting device, partially cut away.
2 is a partially cut away side view of FIG.
FIG. 3 is a partially cutaway front view showing a state in which a mark of a workpiece is being imaged.
4 is a sectional view taken along line (4)-(4) in FIG. 3;
FIG. 5 schematically shows a front view of the cutting device.
[Explanation of symbols]
1: Cutting blade 4: CCD camera 6: Stripper B: Light source 36: Light source arrangement 16: Field space 26: Guide hole 36a: Projection hole

Claims (3)

A plurality of light source arrangement portions for assembling a light source are provided at intervals in a portion surrounding at least the visual field space of the stripper having the guide hole of the cutting blade and the visual field space of the CCD camera communicating therewith, and the light source arrangement portion Is an upper illumination device in a cutting device, characterized in that a projection hole or a transmission part from a light source is provided at the bottom of the stripper. The illuminance adjustment and lighting / extinguishing of the light source are controlled. The upper illumination device in the cutting device according to claim 1, wherein the light source is an LED.

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