JP3773844B2 - Upper lighting device in press machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an upward illumination device used in the centering of a mark performed as a pre-operation of press processing (perforation processing (punching processing, drilling processing), cutting processing).
[0002]
Conventionally, binarization of marks by upward illumination of punches and drills is performed by irradiating from both sides of a CCD camera mounted on a camera unit, punching unit, etc., and capturing an image with an imaging unit (CCD camera). Analysis is performed by an image processing apparatus.
Also, in the binarization of the mark by the illumination of the cutting machine, the guide hole of the cutting blade in the stripper from both sides of the camera assembled to the support provided with the cutting blade holder that supports the cutting blade so as to be movable up and down Irradiation is performed through a visual field space that is opened to communicate with the camera, and an image is picked up by an image pickup unit (CCD camera).
These upper illumination devices are composed of an illumination unit using a halogen lamp as a light source and an optical cable (a bundle of optical fibers) connected to the illumination unit, and are applied to a work such as a flexible wiring board, TAB, or a ceramic green sheet. Light is emitted toward the mark.
The upper illumination device using a halogen lamp as a light source is not only expensive in the lighting equipment itself including an optical cable (a bundle of optical fibers) but also the unit of the halogen lamp, and the work is deformed due to heat distortion from the light source of the halogen lamp. There was a problem that accurate drilling could not be expected.
In order to prevent this, today, as a punching machine (punching device, drilling device), LEDs friendly to workpieces are arranged side by side at equal intervals in the circumferential direction of the illumination holder, and used as an upper illumination device. There are also things.
[0003]
By the way, in many cases, a mark is attached to a workpiece for both punching and cutting, the mark is centered, and the process proceeds to drilling or cutting.
Note that after this mark is centered, a drilling process is performed at the center of the mark, and a predetermined position of the workpiece separated by a predetermined amount from the center of the centered mark with a predetermined punch or drill. There is a type for drilling.
However, in any case, the colors of the workpiece and the mark are various.
Therefore, in the case of single-color LED light, if there is almost no difference in contrast between shades due to the color of the workpiece and the mark and the mark cannot be centered by binarization, replace it with an LED with the optimal emission color each time. There is a current situation to deal with.
Further, since there is a limitation on the emission color of the LED, there is a problem that it is not possible to select an optimal illumination color for obtaining the contrast of light and shade necessary for binarization for various workpieces and mark shades.
In the case of multi-value by the pattern matching method etc., the software becomes expensive, and from the viewpoint of searching for high performance and low cost, contrary to the provision of inexpensive drilling machines (punching devices, drilling devices, cutting machines). It is not preferable.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described conventional circumstances, and the intended process is a press capable of obtaining a clear binary image of a mark without changing the illumination each time depending on the hue of the workpiece and the mark. An object of the present invention is to provide an upper illumination device for a processing machine, more specifically, a punching machine (punching process, drilling process) and an upper illumination apparatus for a cutting machine.
[0005]
[Means for Solving the Problems]
  The technical means taken to achieve the above object is to provide a light source group for irradiating the workpiece mark from above on the press machine side, and each light source group is a collection of a plurality of light sources having different emission colors. The light source group is capable of selectively emitting one light source or a plurality of light sources, and emits one light source or a plurality of light sources selected from the light sources of the light source group, so that monochromatic light or mixed light An upward illumination device in a press machine, wherein the mark is irradiated with illumination light composed of light, the mark is imaged by an imaging unit, and the light source is dimmable.The
  Here, the plurality of light sources having different emission colors are preferably suitable for the work without distortion and deformation of the work because the three primary colors (red, green, and blue) are cold light.
[0006]
According to this technical means, one light source or a plurality of light sources necessary for obtaining a clear binary image is selected according to the color of the workpiece and the attached mark, and the range including the mark is emitted. It is possible to irradiate illumination light of a color optimal for binarization.
An experiment was carried out on the relationship between a workpiece and a mark where a clear binary image could not be obtained,
When the work is light blue and the mark is silver, the blue light is emitted and the work is white and the mark is black. When the work is green and the mark is copper, the light is emitted green. If the mark is white, the mark is black, and the workpiece is silver with respect to the ivory system, it is determined as a clear binary image with yellow to red light emission, the workpiece is white, and the mark is black. be able to.
In addition, regarding the hue relationship between a workpiece and a mark for which a clear binary image cannot be obtained, illumination light of the same color (reflective color) or its captured (absorption color) color is applied to one of the workpiece and the mark. When it is used, it is also found that a grayscale image necessary for binarization can be easily obtained. With reference to this, it is possible to perform a preparatory work for obtaining a clear binarized image by performing a setup operation such as light source selection and dimming. Can be simple.
[0007]
  For exampleSpecific configuration of the upper illumination device in a punching machineIsAnd forming a light source holder connected to the image pickup unit having a field space of the image pickup unit provided above the workpiece in a vertically penetrating manner, and each light emission color is different from the light source holder so as to surround the field space. A light source group in which a plurality of light sources are assembled is provided as a unit at intervals of a plurality of groups to form an upper illumination device, and the light source group can selectively emit one light source and a plurality of light sources, Each light source group simultaneously emits the same selected one light source or the same plurality of light sources, irradiates the mark with illumination light composed of monochromatic light or mixed light, and images the mark with an imaging unit, Is to be dimmable.
[0008]
  Claim1Relates to a specific configuration of the upper illumination device in the cutting machine, a plurality of strippers having a guide hole of the cutting blade and a visual field space of the imaging unit communicating with the cutting blade, each having a different emission color in at least a part surrounding the visual field space The upper illumination apparatus is configured by providing a light source group in which a plurality of light sources are gathered as a unit at intervals of a plurality of groups, and the light source group can selectively emit one light source and a plurality of light sources. The group emits the same selected light source or the same plurality of light sources at the same time, irradiates the mark with illumination light composed of monochromatic light or mixed light, and images the mark by the imaging unit. It has been made possible.
  This claim1The plurality of light sources having different emission colors are preferably the three primary colors (red, green, and blue).
[0009]
  Claim2The plurality of light sources are LEDs, and the selected light sources are capable of dimming in synchronization with each light source group.
  Thereby, each light source group can be controlled in a concentrated manner.
[0010]
  Claim3Means that irradiation of the work from each light source group is performed through a transmission part made of a light diffusing material.
  Here, as the light diffusing material, a material having excellent light diffusing characteristics such as POM (for example, trade name: Duracon) is preferable.
[0011]
As a result, a plurality of emission colors transmitted through the transmission part made of a light diffusing material are mixed in a better state without color unevenness and illuminance unevenness, and uniformly illuminate the entire mark area and the surrounding work part.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show the first embodiment, FIGS. 4 to 6 show the second embodiment, FIGS. 7 to 9 show the third embodiment, and FIGS. Shows the fourth embodiment, and the first, second, and third embodiments respectively show an upper illumination device of a punching machine (punching or drilling) as a press machine, and the fourth embodiment. The form has shown embodiment of the upper illuminating device of a cutting machine as a press processing machine.
First, a first embodiment will be described. This embodiment shows a punching machine (punching process) A that is a main part of a punching device for a tape-like workpiece W. This punching device is a TAB, ceramic flexible. 1 shows a workpiece punching device for punching a workpiece W by a punching machine A while feeding a raw material of a workpiece W such as a tape from a feeding mechanism (not shown) and winding it by a winding mechanism (not shown). .
Further, both the feeding mechanism (not shown) and the winding mechanism (not shown) are directly connected to an electrically controllable drive source such as a servo motor on the rotation shaft, and a pinch roller disposed upstream of the punching machine. (Not shown) is configured to quantitatively intermittently feed the workpiece to the drilling machine.
[0013]
In this embodiment, the punching machine A includes a plurality of punching units 11 arranged side by side, and a camera unit 2 integrally provided side by side at a fixed distance on the upstream side of the punching unit 1. Are installed on the machine base A1 so as to be controllable in the X / Y axis directions via an X / Y axis control mechanism 3 (ball screw, drive source omitted) consisting of a ball screw (not shown). Has been.
[0014]
Each punching unit 11 has a U-shape in a side view as in the conventional manner, and is provided with a punch P that can be driven on the distal end side of the upper half 11a, and the punch P on the upper surface on the distal end side of the lower half 11b. Is a well-known configuration in which the die D is held in response to the punching process, and the workpiece W is punched independently by driving the driving source (air cylinder, servo motor, linear motor, etc.) C.
The punching unit 11 can be freely equipped with a gang die, or has a grid die (having a punch at a position corresponding to the same position in each processing area divided into a grid pattern on the work and finely moves it. Equipped with a mold that drills holes at the same location in each processing area each time.
[0015]
The image pickup unit 4 installed in the camera unit 2 is a CCD camera (denoted with reference numeral 4 below) and is controlled in the X and Y axis directions together with the punching unit 11 to perform intermittent feeding. The mark M attached to the workpiece W to be picked up is imaged. The imaging data is binarized by an image processing apparatus (not shown), the center of the mark M is detected from the binarized image by measuring the center of gravity, and the punching machine A itself is corrected based on the centering data. After that, the punching machine A is controlled to move in the X and Y axis directions so that the required punch P is placed at a fixed distance from the CCD camera 4 immediately above the mark M, and then punching is performed. Program controlled to do so.
This series of controls is built in the ROM of a control unit (not shown).
In the case of drilling with a gang die or grid die, the center of the mark is detected by measuring the center of gravity as described above, and the punching machine itself is corrected based on the centering data before the gang die. Based on the fixed distance of the grid die to the CCD camera, the punching machine itself is controlled in the X and Y axis directions to punch the workpiece.
Of course, when the mark is to be punched, the center of the mark is punched with a predetermined punch.
[0016]
The upper illumination device 5 required for imaging with the CCD camera 4 includes a light source holder 15, a plurality of light source groups 25 attached to the light source holder 15, and an attaching / detaching means 35 to the tip of the CCD camera 4. ing.
[0017]
As shown in FIGS. 2 and 3, the light source holder 15 is molded from a plastic material such as POM (trade name: Duracon) having excellent light diffusibility and is formed from the inner edge of a flat plate portion 15a having a donut plate shape parallel to the workpiece W. A cylindrical portion 15b that secures the visual field space Q of the CCD camera 4 is formed to rise through the curved portion.
The attaching / detaching means 35 is a connecting cylinder (reference numeral 35 in the following description) that is formed integrally with the lens cylinder 14 that is the tip of the CCD camera 4 and that has an inner diameter that is integrally raised from the outer edge of the flat plate portion 15a. Explained).
[0018]
Each of the light source groups 25... Is shielded from each of the shielding plates 25b vertically spaced from the mounting substrate 25a made of an inner and outer diameter donut plate that is inserted through the cylindrical portion 15b and fits inside the connecting tube 35. The plurality of light sources (hereinafter referred to as LEDs) L1, L2, and L3 of red, green, and blue LEDs are assembled on the mounting substrate 25a.
Each LED L1, L2, L3 is attached obliquely downward.
Specifically, as shown in FIGS. 2 and 3, the mounting substrate 25a is incorporated between the tube portion 15b and the connection tube 35 so that the LEDs L1, L2, and L3 face the curved portion. The upper illumination device 5 that approaches the workpiece W is configured by fitting the upper end of the connection tube 35 to the lens tube 14 of the CCD camera 4.
The plurality of LEDs L 1, L 2, L 3 of each light source group 25... Are oriented such that each single light color to be irradiated is well mixed and concentrated on one point (predetermined area including the mark M) of the workpiece W. Is set.
[0019]
A reflective layer 45 is applied on the inner surface of the connecting tube 35 and the outer surface of the tube portion 15b that surrounds the visual field space Q so as to cover the plurality of light source groups 25 of the upper illumination device 5, and in the mark M direction. Considering so as to block the irradiation from the LEDs L1, L2, and L3 to the lens while improving the irradiation characteristics of the above.
[0020]
Each of the light source groups 25 is connected to a light control device (not shown).
This dimmer has a main switch for turning on and off, a plurality of selection switches for combining red, green, and blue LEDs, a selection switch for a single LED, a light amount adjustment switch, and the like. After the selection switch is selected, each light quantity of the LED is adjusted by the light quantity adjustment switch, and the LED selected by the selection switch or the selection switch is dimmed in synchronization with each light source group 25. Yes.
Of course, a light amount adjustment switch may be provided for each light source, and each light source may be dimmed individually.
[0021]
The upper illuminating device 5 of the punching machine (punching process) A configured in this way emits light from the light source holder 15 toward the mark M applied to the workpiece W every time it is intermittently fed. This is performed through the curved portion with the cylindrical portion 15b. Light that has passed through the transmissive portion (light source holder 15) made of a light diffusing material diffuses, and when irradiated from a plurality of selected LEDs L1, L2, and L3, good color unevenness and illuminance unevenness The mark W and the portion of the workpiece W around the mark M are illuminated with uniform illuminance by mixing with the color, and the contrast of the light and shade necessary for obtaining a clear binary image in an image processing apparatus (not shown) is obtained. And the mark M.
[0022]
The connecting tube 35 may be a separate body from the light source holder 15. In the case of a separate body, it is free to mold with a light-impermeable material.
[0023]
Next, a second embodiment shown in FIGS. 4 to 6 will be described. This embodiment relates to an upward illumination device 5a in a punching machine (punching process) A1 of a type in which a punch swings.
[0024]
This punch swing type drilling machine A1 is a workpiece holder WH for detachably attaching (attaching or adsorbing) a sheet-like workpiece W1 to a workpiece carrying space 11- of the punching unit 11 by means of an X / Y axis moving mechanism 6. 1, and a CCD camera (denoted by reference numeral 4 in the following description) is supported as an imaging unit 4 on the upper half 11a of the punching unit 11 so as to be coaxial with the die D. The punch P can be controlled and controlled by the swing mechanism between the die 4 and the die D. When the mark M is imaged, the punch P is swung horizontally so as to escape from the coaxial position with the CCD camera 4 and the die D, and then the image is picked up and the punching machine A1 is corrected using the centering data. Thereafter, the punch P is swung (returned) in the horizontal direction so as to be positioned coaxially with the CCD camera 4 and the die D.
[0025]
The vertical illumination device 5a has a configuration that will be described in detail in the first embodiment. The vertical illumination device 5a is configured to be fitted to the lens tube 14 of the CCD camera 4, and is dimmed in the same manner as in the first embodiment. It is in contact with a device (not shown).
[0026]
Further, as shown in FIGS. 4 and 5, the mechanism for moving the punch P in the horizontal direction is provided with an air cylinder 7 for perforation driving at the rear portion of the CCD camera 4 in the upper half portion 11a of the punching unit 11. A lower wall 17 of the air cylinder 7 extends downward to form a bearing 27, and a piston rod 37 guided by the bearing 27 protrudes downward, and a retainer 18 is provided on the outer periphery of the bearing 27. The lower end of the piston rod 37 is clamped and fixed to the lower end of the support 8 that can be moved up and down and swingable, and the arm AM is integrally extended to the support 8 and punched at the tip. The front end of the piston rod 19 of the swing air cylinder 9 that supports P and supports the rear end of the upper half portion 11a of the rear portion of the support 8 is connected to the support 8. .
In this mechanism, when the support cylinder 8 is rotated by operating the air cylinder 9 for swinging, the length of the arm AM is set so that the punch P at the tip is coaxial between the CCD camera 4 and the die D. When the piston rod 19 is pulled, the punch P is disengaged (escapes) from the coaxial position of the CCD camera 4 and the die D.
[0027]
The upper illuminating device 5a of the punching machine A1 constructed in this way is fed by the X / Y axis moving mechanism 6 with the feed amount as the work W1 is taught, and causes the mark M to reach directly below the CCD camera 4. After that, irradiation is performed from above by one selected LED L1, L2, L3 or a plurality of selected LEDs L1, L2, L3. Light that has passed through the transmissive part (light source holder 15) made of a light diffusing material diffuses, and when irradiated from a plurality of LEDs L1, L2, and L3, it is mixed into a good color with no color unevenness or illuminance unevenness. As a result, the mark M and the part of the workpiece W1 around the mark M can be illuminated with uniform illuminance, and the contrast of light and shade necessary to obtain a clear binary image can be added.
Then, the mark M is centered on the basis of the binarized image by the image processing apparatus, and the workpiece W1 is corrected by the centering data, and then the punch P is positioned coaxially with the CCD camera 4 and the die D. It moves backward, swings in the horizontal direction, and is punched by the punch P located above.
[0028]
Next, a third embodiment shown in FIGS. 7 to 9 will be described. This embodiment shows an upward illumination device 5b of a drilling machine (drilling process) A2.
[0029]
This punching machine A2 is necessary for the upper case 100 and the lower case 200, which are in a close relationship with a workpiece loading space through which a sheet-like workpiece W2 such as a printed board enters via the X / Y axis moving mechanism 6 being inserted. It is configured with built-in devices and mechanisms.
[0030]
The upper case 100 has an open lower end side as shown in the figure, and incorporates an upper illumination device 5b, a CCD camera 4, an image processing device E, a monitor F, etc., and the lower case 200 has a drill hole 201 on its upper surface. And a feed mechanism 300 for the drill G is built in.
[0031]
The upper illumination device 5b includes a light source holder 15c having a cylindrical shape or a tapered cylindrical shape formed of a plastic material such as POM (trade name: Duracon) having excellent light diffusibility as in the above-described embodiments, A light source group 25 attached to the outer peripheral surface of the light source holder 15c, a covered portion 55 provided at the upper end of the light source holder 15c and integrally formed with a connecting tube 55a, and a connecting tube 55a of the covered portion 55 And a telescopic joint 65 that connects the upper end to the lens tube 14 of the CCD camera 4. A support arm 400 is fixed to the lower end of the light source holder 15 c, and the X / Y axis movement mechanism 6 works the workpiece. Each time W2 is sent, the support arm 400 is lowered by an elevating mechanism (not shown), and the work W2 is lightly sandwiched between the light source holder 15c and the work table on the upper surface of the lower case 200. It is to be so.
The connecting tube 55a is fitted to the lens tube 14 of the CCD camera 4 and, more specifically, loosely fitted to form a visual field Q of the CCD camera 4 in the light source holder 15c.
[0032]
Further, the light source holder 15c has a slanted cylinder 15c-1 projecting from the inside at an intermediate portion thereof, and a suction tube 500 communicating with a vacuum device (not shown) in the slanted cylinder 15c-1. Can be connected, and drill chips can be sucked out.
[0033]
The light source group 25 is configured by assembling surface-mounted red, green, and blue LEDs (which will be described below with reference numerals L1, L2, and L3) and is formed on the same outer peripheral surface of the light source holder 15c. It is attached at regular intervals.
The light source group 25 is in communication with the light control device in the same manner as in the first embodiment and the second embodiment.
[0034]
Although not described in detail, the feed mechanism 300 of the drill G is lifted by a Z-axis mechanism linked to an X / Y-axis feed mechanism whose feed amount can be finely adjusted and drilled to the mark M of the workpiece W2. .
In this embodiment, as shown in FIG. 8, it is possible to freely provide a reflective layer 45 on the inner surface of the light source holder 15c, and the light source described above so that there is no interference of emission colors between the light source groups 25. A shielding plate may be provided at regular intervals within the thickness of the holder 15c, and the light source group 25 may be arranged at regular intervals in the light source holder 15c portion between the shielding plates.
[0035]
The upper illuminating device 5b of the punching machine A2 configured in this manner is configured so that the workpiece W2 is placed between the upper case 100 and the lower case 200 so that the mark M is positioned immediately below the lower end opening of the light source holder 15c by the X / Y axis moving mechanism 6. And the workpiece W2 is lightly clamped and then the LEDs L1, L2, and L3 selected toward the mark M emit light and light is transmitted. The holder 15c) is mixed with a good color with no color unevenness and uneven illumination, and the mark W and the work W2 portion around the mark M are illuminated with uniform illumination, and the contrast of light and shade necessary to obtain a clear binary image is obtained. wear.
After centering, the drill G is finely adjusted by the X / Y-axis feed mechanism based on the centering data, then lifted by the Z-axis mechanism and drilled to the workpiece W2, and the drill dust is sucked into the suction pipe. 500 is discharged to the outside.
[0036]
Next, the upper illumination device 5c in the cutting machine A3 shown in FIGS. 10 to 12 will be described. The cutting machine A3 is configured to support the support 600 having the cutting blade holder KH that supports the cutting blade K so as to be movable up and down at regular intervals. The CCD camera 4 is provided in parallel at equal intervals along the left and right edges of the workpiece W3 mounted and fixed on the index table T (vacuum fixed) from the diagonally upper sides of the cutting blade K every time the address is intermittently fed. An image processing device binarizes the imaged linear mark M, aligns the imaged data with the binarized image, and corrects the index table T in the θ direction using the centered data. The support 600 is moved downward to cut the mark M between the left and right edges, and a light source group 25 in which a plurality of light sources are gathered in the stripper S is arranged at equal intervals.
[0037]
The stripper S abuts against the workpiece W3 before the cutting blade K descends, and holds the workpiece W3 immovably with the index table T before the cutting blade K descends. The CCD camera 4 is configured to be urged by a spring SP so as to continue to be held until the workpiece W3 is pulled out from the workpiece W3, and communicates with the guide hole 700 of the cutting blade K and includes the through hole 800. The viewing space Q is opened at both ends.
[0038]
The light source group 25 is a unit group formed by aggregating red, green, and blue lamp-type or chip-type LEDs (described below with reference numerals L1, L2, and L3) around the through hole 800. And it arrange | positions for each unit group in the recessed part 801,701 recessed at equal intervals in the both ends along the guide hole 700 connected to the through-hole 800, and shape | molds the recessed part 801,701 bottom with a light-diffusible material. The upper illumination device 5c is configured by being closed by the bottom portion 75 (transmission portion).
[0039]
Also for the upper illumination device 5c in the cutting machine A3, the contrast between the workpiece W3 and the mark M has an optimum contrast for obtaining a clear binary image of the mark M due to the light diffusion effect of the light diffusible bottom 75. Can be attached.
Of course, also in the second, third and fourth embodiments described above, the orientation of the plurality of LEDs constituting the light source group is such that the single light color from the plurality of LEDs selected in each light source group is well mixed. It is set to be.
The reason why the light source groups 25 are arranged at equal intervals at both end portions along the guide hole 700 is to support a narrow work W3.
[0040]
  Although not described in detail in all the embodiments, it is needless to say that pre-setting (light source selection, dimming, etc.) is performed to irradiate illumination light of a color necessary to obtain a contrast between the workpiece and the mark. And claims1Of course, each light source of the light source group configured by assembling a plurality of light sources having different emission colors can be individually dimmed.
[0041]
【The invention's effect】
  Since the present invention is configured as described above, illumination light having an optimum color is obtained for obtaining the contrast of light and shade necessary for obtaining a clear binary image according to the hue between the workpiece and the mark attached thereto. can do.
  And in a cutting machine, since the light source group is arrange | positioned at equal intervals also in the both ends of the guide hole which a cutting blade penetrates, it can respond also to a narrow workpiece | work.
  In addition, when the illumination light is transmitted through a transmission part made of a light diffusive material, a plurality of emission colors are mixed well, and the entire mark area is illuminated with illumination colors with no color unevenness and illumination unevenness. And the surrounding work part can be irradiated uniformly.
  Therefore, it is not necessary to replace the illumination unit every time the color of the workpiece and the mark changes, and the problem that the illumination color cannot be arbitrarily selected is eliminated, and all colors in the visible light region (wavelength 400 nm to 700 nm) are eliminated. The illumination light can be selected, and a clear binary image can be obtained in response to a combination of colors of the workpiece and the mark.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of a punching machine (punch) used in a first embodiment of an upward illumination device in a press machine of the present invention.
FIG. 2 is an enlarged sectional view of the upward illumination device according to the first embodiment.
3 is an enlarged sectional view taken along line (3)-(3) in FIG. 2;
FIG. 4 is a perspective view of a punching machine (punch) used in the second embodiment.
FIG. 5 is a partially cutaway side view.
FIG. 6 is an enlarged cross-sectional view of the upper illumination device according to the second embodiment, in which (a) shows a state before drilling. (B) shows a state in which a mark is being imaged.
FIG. 7 is a partially cutaway side view of a drilling machine (drill) used in the third embodiment.
FIG. 8 is an enlarged cross-sectional view of the upper illumination device of the third embodiment.
9 is a sectional view taken along line (9)-(9) of FIG.
FIG. 10 is a perspective view of a main part of a cutting machine used in the fourth embodiment.
FIG. 11 shows only the stripper in the same plan view.
FIG. 12 is a longitudinal sectional view of the stripper.
[Explanation of symbols]
A, A1, A2: punching machine 4: imaging unit (CCD camera)
15, 15c: Light source holder (transmission part) Q: Viewing space
L1, L2, L3: Light source (LED) 45: Reflective layer
A3: Cutting machine S: Stripper
K: Cutting blade 700: Guide hole of cutting blade
5, 5a, 5b, 5c: Upper illumination device 25: Light source group
75: Transmission part

Claims (3)

Set and guide hole of the cutting blade, it stripper and a view volume of the imaging portion communicating, portion surrounding the viewing space, and a plurality of light sources having different respective emission colors in both end portions along the guide hole The upper illumination device is configured by providing a plurality of light source groups as a unit at intervals, and the light source group can selectively emit one light source or a plurality of light sources, and each light source group is selected. The same one light source or the same plurality of light sources are simultaneously emitted, and the mark is irradiated with illumination light composed of monochromatic light or mixed light, and the mark is picked up by the image pickup unit. The light source is dimmable. An upward lighting device in a press machine characterized by comprising: Wherein the plurality of light sources LED, and the upper illumination device in the press machine according to claim 1, characterized in that the selected light source, characterized in that it enabled synchronously dimming for each light source group. The upward illumination device in the press machine according to claim 1 or 2, wherein irradiation of the work from each light source group is performed through a transmission part made of a light diffusing material.

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