JPH0736263U - Authenticity determination device for printed matter - Google Patents

Abstract

(57) [Summary] [Purpose] The harmful ultraviolet rays from the ultraviolet irradiation device do not directly enter the eyes and the visibility of the inspection object is improved without the provision of a light shielding hood or a reflector, and the device is compact. To provide an authenticity determination device that can realize designing and also freely design inspection points to be provided on a printed matter. [Structure] An upper window portion 11 and a lower window portion 12 are provided at corresponding positions on the upper and lower portions of the box body 2, and an ultraviolet irradiation device is provided inside the box body 2 adjacent to the lower window portion 12. The authenticity of the printed matter is characterized in that the ultraviolet irradiation device 18 has an opening whose light distribution is controlled so that the emitted ultraviolet light is irradiated only toward the lower window portion 12. Judgment device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an authenticity determination device that can easily determine the authenticity of printed matter such as securities, lottery tickets, and banknotes.

[0002]

[Prior art]

 It has been widely known in the past to print a fluorescent ink containing a fluorescent substance on a printed matter such as securities in order to prevent forgery and alteration. This utilizes the fact that the fluorescence emitted from these printed materials cannot be confirmed under normal visible light irradiation, but can be confirmed only under ultraviolet irradiation.

For this reason, the authenticity determination device for determining the authenticity of these printed matter is equipped with an ultraviolet irradiation device such as a black light lamp, but harmful ultraviolet rays are not directly applied to the eyes and are irradiated only to the inspection object. To prevent this, a light-shielding hood is provided between the observation window and the UV irradiation device, and further behind the UV irradiation device, that is, on the extension of the line connecting the detection window where the inspection object is placed and the UV irradiation device. There was a reflector. (Executive publication 6441 No. 6441 publication, actual publication Sho 62, No. 22835 publication)

In addition to the ultraviolet irradiation device, a visible light lamp is provided, and a genuineness judgment device is also known that can easily detect forgery such as cutting and pasting or forgery by seeing through a printed matter. (1987, No. 20073).

In this authenticity determination device, a box is provided with an insertion port for an inspection object such as a printed matter, and an inspection object placement table made of frosted glass or the like is provided corresponding to the insertion port, and the placement table is placed above and below the placement table. A black light lamp is placed above and a visible light lamp is placed below, with the insertion opening sandwiched between them.

[0006]

As described above, in these authenticity determination devices, a light-shielding hood is provided between the observation window and the ultraviolet irradiation device, and a reflection plate is provided behind the ultraviolet irradiation device. There is a problem in that the distance between the inspection objects is generated, the visibility of the inspection objects is reduced, and it is difficult to judge the authenticity.

Further, in an authenticity determination device equipped with a visible light lamp, when the visible light lamp is turned on from below to inspect the inspection target through the inspection object, the distance between the observation window and the inspection target is generated, There is a problem in that the visibility of the inspection object is lowered and it is difficult to judge the authenticity.

Further, the provision of such a light-shielding hood, reflecting plate, and insertion port is a structural limitation, and only a relatively large authenticity judging device can be realized. In particular, in the case of an authenticity determination device with an insertion port, the size, shape, and inspection points of the printed matter to be inspected are limited because the insertion port is fixed.In particular, if the printed matter is bent, insert it. The inconvenience of being difficult was occurring.

The present invention has been made in view of the above circumstances, and solves the above-mentioned conventional problems and eliminates harmful ultraviolet rays from the ultraviolet irradiation device without providing a light shielding hood or a reflector. It is possible to improve the visibility of the object to be inspected without seeing it directly, and also to make the device compact, and at the same time, determine the authenticity of the object to be inspected by confirming the presence or absence of a magnetic material. It is an object of the present invention to provide an authenticity determination device that can be used.

[0010]

[Means for Solving the Problems]

 To this end, the authenticity determination device for printed matter according to the present invention is provided with an upper window portion and a lower window portion penetratingly formed at corresponding positions of an upper surface plate portion and a lower surface plate portion of the box body. A device for determining the authenticity of a printed matter, comprising an ultraviolet irradiation device provided in a position adjacent to the lower window inside, wherein the ultraviolet irradiation device ensures that the ultraviolet light emitted from the ultraviolet irradiation device is directed only toward the lower window. It is characterized by having an opening whose light distribution is controlled so that it is irradiated.

Further, the ultraviolet irradiation device of the authenticity determination device is characterized in that it is a black light lamp provided with a reflective film having a fixed opening on the inner or outer surface of the glass tube.

In addition, when the authenticity of the inspection object is determined by the transmitted light, the authenticity determination device is provided with a visible light lamp adjacent to the upper window portion inside the box of the authenticity determination device. It is characterized by

Further, when the authenticity of the inspection object is determined by confirming the presence or absence of the magnetic material applied to the printed matter, the authenticity determination device uses a pen-type magnetic detection provided with a magnetic sensor at the tip. It is characterized in that the tool is attached to the box that is the main body of the authenticity determination device, or that the magnetic detection part in which the detection surface of the magnetic sensor is exposed on the surface of the box that is the main body of the authenticity determination device is provided in this box.

[0014]

[Action]

 When using this authenticity judgment device to make authenticity judgments based on the presence or absence of fluorescent substances, place the printed matter to be inspected under the authenticity judgment device, align the inspection point with the lower window, and turn on the UV irradiation device. , Looking through the upper window for the presence or absence of fluorescent light emission, the ultraviolet light emitted from the ultraviolet irradiation device installed in the position adjacent to the lower window is controlled by the opening provided in the ultraviolet irradiation device. And only the lower window is irradiated. Therefore, harmful ultraviolet rays do not directly enter the viewer's eyes through the upper window even without providing a light-shielding hood. Further, since the ultraviolet light emitted from the ultraviolet irradiation device is applied only to the lower window portion, it is not necessary to provide a reflector.

As described above, since it is not necessary to provide the light-shielding hood and the reflection plate in this authenticity determining device, it is possible to shorten the distance between the upper window portion which is the observation window and the printed matter, and to improve the visibility during observation. You can improve. Further, since it is not necessary to provide a light-shielding hood and a reflection plate, which are structural restrictions, the device can be made compact.

In addition, the authenticity determination device is combined with a visible light lamp for authenticity determination, that is, forgery / alteration such as cutting and pasting of characters, symbols, numbers, etc. printed by seeing through a printed matter through transmitted light. When confirming the presence or absence, place the printed matter on the authenticity judgment device, align the inspection point with the upper window part, turn on the visible light lamp and observe the printed matter through the observation, but place the upper window part on the printed matter. By using it as a stand, it is possible to improve the visibility during observation. Further, since it is not necessary to provide an insertion port which is a structural limitation, the device can be made compact.

Furthermore, by combining the magnetic detection tool or the magnetic detection unit, it is possible to easily perform the authenticity determination by confirming the presence or absence of the magnetic material applied to the printed matter. In the authenticity determination device combined with the magnetic detection tool, the magnetic sensor provided at the tip of the magnetic detection tool scans the inspection location of the printed matter to detect the presence or absence of the magnetic material as an electric signal. Further, in the authenticity determination device combined with the magnetic detection unit, the presence or absence of the magnetic material is detected as an electric signal by scanning the exposed surface of the magnetic sensor provided on the surface of the box while abutting the inspection location of the printed matter. The detected electrical signal is displayed as a determination result on a determination display unit provided on the surface of the box body or the like.

[0018]

【Example】

 Hereinafter, the details of the present invention will be described with reference to the drawings, an embodiment including an ultraviolet irradiation device, a visible light lamp, and a magnetic detection tool. 1 to 4, FIG. 1 is a perspective explanatory view of an authenticity determination device, and FIGS. 2 to 4 are plan views and front views of a box which is the main body of the authenticity determination device excluding the magnetic detection tool of the authenticity determination device. It is a figure and a side view. In this example, 1 is an authenticity judging device, which is a rectangular parallelepiped box body 2 composed of an upper plate 3, a lower plate 4, a front plate 5, a rear plate 6, a right side plate 7 and a left side plate 8 and a magnetic field. It is composed of a detection tool 27.

An upper window portion 11 and a lower window portion 12 are formed through the upper plate 3 and the lower plate 4, respectively. The upper window portion 11 and the lower window portion 12 are formed at corresponding positions on a straight line in the vertical direction, and each has a rectangular shape. The shapes of the upper window portion 11 and the lower window portion 12 are not limited to rectangular shapes as in this example, but when the visible light lamp 17 and the ultraviolet irradiation device 18 are cylindrical lamps, the irradiation range is The shapes of the upper window portion 11 and the lower window portion 12 are preferably rectangular, because they are almost rectangular. The upper window portion 11 is used as an observation window when the authenticity of the printed matter is judged by fluorescence emission, and as an arrangement stand of the printed matter when the authenticity is judged by the transmitted light. Further, the lower window portion 12 is used as a detection window when making authenticity determination by fluorescence emission.

The lower window portion 12 may be transparent, but the upper window portion 11 is provided with a window member 13 such as a frosted glass plate, a colored glass plate, a colored acrylic plate or the like for preventing outside light from entering the inside of the box 2. It is attached. These window members 13 are used to prevent the fluorescent light emission at the inspection location of the printed matter from becoming difficult to see under the influence of external light during observation using the ultraviolet irradiation device 18. Further, since the harmful ultraviolet rays reflected from the printed matter are attenuated by the window member 13, the eyes of the observer can be protected. If necessary, a filter for blocking ultraviolet rays may be additionally provided on the window member 13.

Further, if a magnifying lens is attached to the upper window portion 11, the visibility when the authenticity of the printed matter is judged by fluorescence emission is improved. In addition, if this magnifying lens is built into a foldable frame so that it can be placed on the upper window 11 when authenticity is determined, not only will the space for installation be saved, but the transmitted light will also allow printed matter to be printed. It can also be used when making authenticity decisions.

The upper surface plate 3 is provided with a power switch 14, which is an illumination switch, a visible light lamp lighting switch 15, and an ultraviolet irradiation device lighting switch 16. If there is a certain inspection position on the printed material for authenticity determination using transmitted light, a step is provided on the top plate 3 of the box body 2 so that the inspection position matches the upper window 11. If so, the step can be used for aligning the printed matter.

A visible light lamp 17 is provided inside the box 2 at a position adjacent to the upper window 11 along the long side of the upper window 11, and at a position adjacent to the lower window 12. An ultraviolet irradiation device 18 is provided along the long side of the lower window portion 12. The visible light lamp 17 and the ultraviolet irradiation device 18 may be provided along the short side instead of being provided along the long side of the window as in this example, but the irradiation of the visible light lamp 17 and the ultraviolet irradiation device 18 may be performed. Considering efficiency, it is preferable to provide along the long side. Further, the visible light lamp 17 and the ultraviolet irradiation device 18 are both provided on the rear plate 6 side in this example, but for example, the visible light lamp 17 is provided on the rear plate 6 side and the ultraviolet irradiation device 18 is provided on the front plate 5 side. It may be provided. In this case, the distance between the upper window portion 11 and the lower window portion 12 is further shortened, so that not only the visibility at the time of performing the authenticity determination by the fluorescence emission is improved, but also the thickness of the box body 2 can be reduced, and the authenticity can be reduced. The determination device can be made compact.

The visible light lamp 17 is used as a light source for authenticity determination using transmitted light. Since the visible light lamp 17 is provided in a position adjacent to the upper window portion 11, the light emitted from the visible light lamp 17 is emitted from the visible light lamp 17. The inspection location of the printed matter arranged in the upper window 11 is sufficiently illuminated, and the visibility during observation is improved. Further, even the visible light lamp 17 having a low emission intensity can be sufficiently observed, so that the influence of the heat generation of the visible light lamp 17 on the inside of the box can be suppressed. As such a visible light lamp 17, in addition to an incandescent lamp, an LED lamp can be used.

The ultraviolet irradiation device 18 is used as a light source for authenticity determination by fluorescence emission, and by being provided in a position adjacent to the lower window portion 12, the ultraviolet light emitted from the ultraviolet irradiation device 18 is at the bottom. The inspection location of the printed matter arranged in the window 12 is irradiated closely, and the visibility during observation is improved. The ultraviolet irradiation device 18 is of a fluorescent lamp type as shown in FIG. 5, and is provided with a reflection film 21 having a constant opening toward the lower window 12 on the inner or outer surface of the glass tube. The shape of the opening is preferably a rectangle similar to that of the lower window 12. The opening angle of the opening can be determined according to the size of the lower window 12, the distance between the ultraviolet irradiation device 18 and the lower window 12, the opening direction, etc., but 180 ° or less, preferably 45 to 90. If it is set in the range of °, the ultraviolet rays do not reach the upper window portion 11 and are emitted only toward the lower window portion 12.

As the ultraviolet irradiation device 18, a reflective lamp 21 is provided on a fluorescent lamp type ultraviolet irradiation device such as a black light lamp that emits only near ultraviolet light of 300 to 430 nm. The reflection film 21 is formed on the inner surface or the outer surface of a glass tube made of a glass material that transmits near-ultraviolet rays in an arbitrary wavelength range, for example, a range of 300 to 400 nm, by a method such as a coating method, a printing method, or a vapor deposition method. .

When the reflective film 21 is formed on the inner surface of the glass tube by a coating method, a paint composed of a powder of titanium oxide, calcium pyrophosphate, zirconium oxide, etc. and a solvent is used as the reflective film material so that the inner surface of the glass tube has an opening. It is formed by coating and baking. After this, a sealing step, an exhausting step, and a finishing step are performed to manufacture the ultraviolet irradiation device 18 having an opening.

When the reflection film 21 is formed on the outer surface of the glass tube by a coating method or a printing method, a paint or ink containing metal powder such as aluminum or tin is applied or printed so as to have an opening on the outer surface of the glass tube. It is dried and formed later. After this, a sealing process, an exhausting process, and a finishing process are performed to manufacture the ultraviolet irradiation device 18 having an opening. The ultraviolet irradiation device 18 can also be manufactured by using a commercially available black light lamp and forming a reflective film having an opening on the outer surface of the black light lamp by a coating method or a printing method.

When the reflective film 21 is formed on the outer surface of the glass tube by a vapor deposition method, a metal material such as aluminum or tin is vacuum-deposited so as to have an opening on the outer surface of the glass tube. After that, the ultraviolet irradiation device 18 is prepared by performing the sealing process and the subsequent steps as in the case of the coating method. In this case as well, a reflective film having openings may be formed on the outer surface of a commercially available black light lamp by vapor deposition.

In addition, an aluminum foil may be attached to the outer surface of the glass tube to form the reflective film 21.

By providing the reflective film 21 having the opening portion in this way, the ultraviolet light emitted from the ultraviolet light irradiation device 18 is irradiated only on the lower window portion 12 with its light distribution controlled. Therefore, harmful ultraviolet rays do not enter the eyes of the observer directly through the upper window 11 without providing a light-shielding hood. Further, since the ultraviolet rays emitted from the ultraviolet ray irradiating device 18 are emitted only to the lower window portion, it is not necessary to separately provide a reflecting plate.

Further, a power supply unit 23, a circuit device 24, and a magnetic determination unit 25 are arranged inside the box body 2, and a magnetic detection tool 27 is attached to the outside of the box body 2.

A magnetic sensor is provided at the tip of the magnetic detector 27, and is connected to the magnetic determination unit 25 via a lead wire 28. The magnetic sensor detects the presence / absence of the magnetic material applied to the printed matter and outputs it as the presence / absence of an electric signal, and a coil, a Hall element, a magnetic resistance element, or the like can be used. The magnetic sensor used here does not read the magnetically recorded information contents like the magnetic head normally used for magnetic recording, but whether the printed matter is printed with magnetic ink or not. Any material that can detect the presence or absence of the magnetic material applied to the printed matter, such as whether or not the magnetic material is embedded, may be used. Some magnetic sensors require an external magnetic field when detecting a magnetic material. In this case, the magnetic detection tool 27 is provided with a magnetic field generating means such as a permanent magnet or an electromagnet in addition to the magnetic sensor. In this way, when the inspection position of the printed matter is scanned by the magnetic detection tool 27 having the magnetic sensor at the tip, when the printed matter is printed with magnetic ink, when the magnetic material is embedded in the printed matter, the other printed matter itself When magnetized, the magnetic sensor detects the magnetic material and converts it into an electrical signal. The detection result converted into the electric signal is sent from the magnetic detection tool 27 to the magnetic determination unit 25 via the lead wire 28.

Although not shown in the figure, a magnetic detection unit is provided in the main body of the box body 2 instead of the magnetic detection tool 27, and the magnetic detection unit detects the presence or absence of the magnetic material applied to the printed matter. You can also do it. In this case, a magnetic detection unit is provided in which the detection surface of the magnetic sensor is exposed on the surface of the box body 2. Then, the exposed surface of the magnetic sensor is scanned while contacting the inspection site of the printed matter to detect the presence or absence of the magnetic material. The result detected by the magnetic detection unit is sent to the magnetic determination unit 25 as an electric signal.

The magnetic judgment unit 25 adjusts the output range when the detection result sent from the magnetic detection tool 27 or the magnetic detection unit is used as the judgment result. If the electric signal sent from the magnetic sensor is used as the determination result as it is, there is a risk that even the noise generated when the magnetic sensor scans the printed matter may be detected. Therefore, the electric signal sent by the magnetic judgment unit 25 is adjusted according to the judgment result, that is, the threshold value when the magnetic material is applied to the printed matter, for example, the reference voltage of the comparator. The judgment result is sent to the judgment display unit 16 only when the judgment result is within the threshold range. Therefore, as a result, the sensitivity of the magnetic sensor can be adjusted by the magnetic determination unit 25.

The judgment display section 15 displays the electric signal sent from the magnetic judgment section 25 as a judgment result. In this example, the box 2 is an illumination switch that also serves as a switch for lighting a visible light lamp. It is provided on the upper surface plate 3 of. In this case, when the printed material is coated with a magnetic material such as magnetic ink, the illumination switch, which is the determination display unit 15, is turned on. As described above, it is preferable that the determination display unit is configured by the visible light lamp lighting switch 15 and the ultraviolet irradiation device lighting switch 16, and displays by utilizing these lightings. This makes it possible to omit the separate provision of the indicator light. In addition, the judgment display is not limited to the lighting as described above, and may be a voice notification such as a buzzer.

Next, an operation of authenticity determination in the authenticity determination device configured as described above will be described.

When confirming the presence or absence of the fluorescent substance, the printed matter 26 which is the inspection object is placed under the box 2 which is the main body of the authenticity determination device 1, the inspection place is aligned with the lower window portion 12, and the ultraviolet irradiation device is turned on. The switch 16 is pressed to turn on the ultraviolet irradiation device 18. The ultraviolet rays emitted from the ultraviolet ray irradiation device 18 are controlled in their light distribution by the openings provided in the ultraviolet ray irradiation device 18, and are irradiated only to the inspection portion of the printed matter 26, and the fluorescent light emitted as the reflected light is emitted from the upper window portion 11. To be observed. When forged or altered, there is no fluorescence emission and it can be determined at a glance that the item is counterfeit.

When checking the presence or absence of forgery or alteration such as cutting and pasting, the printed matter 26 is placed on the box body 2 which is the main body of the authenticity determination device 1, the inspection point is aligned with the upper window part 11, and the visible light lamp is used. The lighting switch 15 is pressed to turn on the visible light lamp 17. The transmitted light from the visible light lamp 17 allows the printed matter to be seen through and observed, so that it is possible to confirm the presence or absence of cutting and sticking. In the case of forgery / alteration such as cutting and pasting, the boundary line between the cut and pasted part and the printed matter body can be clearly confirmed, so that it can be determined at a glance that it is a fake product.

When checking the presence / absence of the magnetic material, the magnetic detection tool 27 scans the inspection location where magnetic ink or the like is applied. When the printed material is coated with a magnetic material, the judgment display section 15 (also used as a switch for lighting the visible light lamp) on the box 2 which is the main body of the authenticity judgment device 1 is lit up and displayed. It can be confirmed that the magnetic material is applied. When the copy is forged by a color copy or the like, the magnetic material is not confirmed. Therefore, even if the magnetic detection tool scans, the determination display unit 15 does not light up, and it can be determined that the copy is a counterfeit. In addition, when confirming the presence or absence of a magnetic material in an example (not shown) in which the magnetic detection unit is provided on the box body 2, hold the box body 2 in your hand with the magnetic detection unit at the inspection location where magnetic ink is applied. Scan on the detection surface, or hold the printed matter in your hand and scan while touching the inspection surface on the detection surface of the magnetic detection unit. The determination result is displayed on the determination display unit 15 as in the case of using the magnetic detection tool 27.

(Experimental Example) An authenticity determination device 1 having an ultraviolet irradiation device 18, a visible light lamp 17, and a magnetic detection tool 27 having the following configuration was produced. A rectangular upper window portion 11 and a lower window portion 12 each having a size of 30 × 15 mm are provided at corresponding positions of the upper surface plate 3 and the lower surface plate 4, and a black smoke acrylic resin plate is used as the window member 13 in the upper window part 11. It is fitted. The outer dimensions of the box 2 of the authenticity determination device 1 were 120 (W) × 60 (D) × 40 (H) mm.

The UV irradiator 18 has a UV light output of 350 μw / cm ² , a peak wavelength of 352 nm, a power consumption of 0.73 W, and a life of 10,000 h, and a black light lamp having an opening angle of 90 degrees and an opening size of 30 × 15 nm. The aluminum foil is attached to the outer surface of the glass tube as described above, and the long side of the lower window part 12 is positioned inside the box 2 adjacent to the lower window part 12 with the opening facing the lower window part 12. It was installed along.

The visible light lamp 17 has an illuminance of 3.21 m, power consumption of 6 V, 1.2 W, and life of 10. An incandescent lamp of 000 h was prepared and installed at a position adjacent to the upper window portion 11 inside the box body 2 along the long side of the upper window portion 11.

The magnetic detection tool 27 was manufactured by using a semiconductor MR element having a life of 1.000.000 as a magnetic sensor and providing this at the tip. The magnetic detection tool 27 was connected to the magnetic determination unit 25 via a lead wire 28.

In addition, a power switch 14 composed of an illumination switch, a visible light lamp lighting switch 15, and an ultraviolet irradiation device lighting switch 16 are provided on the top plate 3 of the box body 2. The power supply unit 23, the circuit device 24, the magnetic determination unit 25, a buzzer for reporting the determination result of the presence / absence of a magnetic material, and a lead wire for electrically connecting these are provided. In addition, the judgment display part was used also as the switch 15 for lighting the visible light lamp.

Next, the authenticity of the printed matter 26 was judged using the authenticity judging device 1. As the printed matter 26, patterns, numbers and symbols were printed. Of these, the patterns were printed with fluorescent ink and the symbols were printed with magnetic ink. In addition, for the numbered part, another printed material was prepared by cutting and pasting in order to confirm the authenticity judgment using the visible light lamp. The pattern printed with fluorescent ink could not be confirmed to emit fluorescence under normal irradiation with visible light. In addition, as a comparative example, a copy of this printed material was prepared using a color copier.

First, the printed matter 26 is placed under the box 2 of the authenticity determination device 1, the pattern to be inspected is aligned with the lower window portion 12, the ultraviolet irradiation device lighting switch 16 is pressed, and the ultraviolet irradiation device 18 Was turned on, and observation was performed through the upper window 11. As a result, it was confirmed that the picture portion of the printed matter emitted fluorescence, and it was found that the printed matter was a genuine printed matter. Next, when a copy of the printed matter 26 was copied using a color copying machine using the ultraviolet irradiation device 18 in the same manner, the copy was observed, and no fluorescent emission was observed, and it was found to be fake.

Next, the printed matter 26 is placed on the box body 2 of the authenticity determination device 1, the number of the inspection point is aligned with the upper window portion 11, and the visible light lamp lighting switch 15 is pressed to display the visible light lamp 17. Was lit, and the upper window portion 11 was observed. As a result, it was possible to see through the printed matter 26, but no traces such as cutting and pasting were confirmed, and it was found that the printed matter 26 was a genuine printed matter. Next, when another printed matter that was cut and stuck was similarly observed using the visible light lamp 17, traces of the cut and stuck were confirmed, and it was proved to be a fake.

Next, the magnetic sensor 27 was scanned while abutting the magnetic sensor portion on the symbol portion, which is the inspection point, of the printed matter 26. As a result, the illumination lamp of the judgment display section 15 was turned on and the buzzer sounded, and it was confirmed that the printed matter was genuine. Next, when the symbol portion of the printed matter was scanned using a color copying machine similarly using the magnetic detection tool 27, the illumination lamp of the judgment display section 15 did not light up and the buzzer did not sound. It turned out to be fake.

[0050]

[Effect of device]

 In this authenticity determination device, the ultraviolet light emitted from the ultraviolet irradiation device provided in the position adjacent to the lower window was irradiated to only the lower window part by controlling the light distribution by the opening provided in the ultraviolet irradiation device. , Harmful UV rays do not enter the eyes of the observer directly through the upper window even if they are not provided on the light-shielding hood. Further, since the ultraviolet light emitted from the ultraviolet irradiation device is applied only to the lower window portion, there is no need to provide a reflector. Therefore, the distance between the upper window, which is the observation window, and the printed matter can be shortened, and the visibility at the time of observation can be improved. Further, since it is not necessary to provide a light-shielding hood and a reflection plate, which are structural restrictions, the device can be made compact.

Further, in this authenticity determination device, the upper window portion is used not only as an observation window for authenticity determination using an ultraviolet irradiation device, but also as a placement table for printed matter when authenticity determination is performed using a visible light lamp. Therefore, the distance between the visible light lamp and the printed matter to be inspected is shortened, and the amount of transmitted light can be increased, so that the visibility during observation can be improved. In addition, since it is not necessary to provide an insertion opening which is a structural limitation, the device can be made compact.

Furthermore, by combining the magnetic detection tool or the magnetic detection unit, it is possible to easily perform the authenticity determination based on the presence or absence of the magnetic material applied to the printed matter.

[Brief description of drawings]

FIG. 1 is an explanatory perspective view of an authenticity determination device.

FIG. 2 is a plan view of a box that is the main body of the authenticity determination device.

FIG. 3 is a front view of a box which is a main body of the authenticity determination device.

FIG. 4 is a side view of a box that is a main body of the authenticity determination device.

FIG. 5 is a side view illustrating an ultraviolet irradiation device.

[Explanation of symbols]

1 authenticity determination device 2 box 3 top plate 4 bottom plate 5 front plate 6 back plate 7 right side plate 8 left side plate 11 upper window part 12 lower window part 13 window member 14 power switch 15 visible light lamp that also functions as a judgment display part Switch 16 UV irradiation device lighting switch 17 Visible light lamp 18 UV irradiation device 21 Reflective film 23 Power supply unit 24 Circuit device 25 Magnetic judgment unit 27 Magnetic detection tool 28 Lead wire

Claims (5)

[Scope of utility model registration request] 1. An upper window portion and a lower window portion penetratingly formed at corresponding positions of an upper surface plate portion and a lower surface plate portion of a box body, respectively, and at a position adjacent to the lower window portion inside the box body. An authenticity determination device for printed matter, comprising an ultraviolet irradiation device provided, wherein the ultraviolet irradiation device controls light distribution so that the ultraviolet light emitted from the ultraviolet irradiation device is irradiated only toward the lower window portion. Of authenticity of printed matter, characterized by having an opening. 2. The authenticity determination device for printed matter according to claim 1, wherein the ultraviolet irradiation device is a black light lamp provided with a reflection film having a constant opening on the inner surface or the outer surface of the glass tube. 3. The authenticity determining device for a printed matter according to claim 1, wherein a visible light lamp is provided in a position adjacent to the upper window portion inside the box body. 4. A pen-type magnetic detection tool having a magnetic sensor for detecting the presence or absence of a magnetic material provided at the tip thereof is attached to the box body. An authenticity determination device for the printed matter. 5. The box body is provided with a magnetic detection unit in which a detection surface of a magnetic sensor for detecting the presence or absence of a magnetic material is exposed on the surface of the box body. An authenticity determination device for the printed matter.