JP2003028800A - Heavy metal containing glass determining apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a heavy metal containing glass determining apparatus capable of easily performing determination based on ultraviolet irradiation. SOLUTION: In this heavy metal containing glass determining apparatus constructed of an ultraviolet lamp and a reflector 38, the ultraviolet lamp is provided with a pair of straight tube parts 42a and 42b, a U-shaped ultraviolet radiation part 20 communicated with the both straight tube parts, and ultraviolet radiation gas charged inside a hermetic vessel, and a reflector is provided with a parabolic part 54 having a parabolic cross section and a pair of straight line parts 56 and 56 extended from both ends of the parabolic part. In the ultraviolet lamp, its straight tube parts are arranged in a space 58 surrounded by the parabolic part of the reflector, and the cross sections of the both straight tube parts are arranged in parallel on the center axis line Y of the cross section of the parabolic part, while the cross section of the straight tube part 42b on the lower end 60 side of the reflector is arranged on a focal point F of the parabolic part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heavy metal-containing glass discriminator used for discriminating a glass containing a harmful heavy metal such as lead, and particularly to a heavy metal-containing glass by irradiating with ultraviolet rays. The present invention relates to a heavy metal-containing glass discriminator having a structure capable of discriminating and securing a large amount of ultraviolet ray irradiation to glass to be measured.

[0002]

2. Description of the Related Art In recent years, for the purpose of environmental protection and effective use of resources, it has been practiced to collect and reuse glass used for discarded home electric appliances and information equipment.

[0003]

However, many of the glasses used in home appliances, information devices, etc. contain heavy metals such as lead, which are harmful to the human body, and are abolished. In order to safely reuse the glass, it is necessary to separate the glass containing the above-mentioned heavy metal from other glasses and to process the glass. By the way, since lead glass containing lead is used as a component in cathode ray tubes used in televisions and personal computer displays, when reusing the cathode ray tube constituent glass, the lead glass should be replaced with other glass. It is required to sort and process.

The present invention has been made in order to meet the above-mentioned requirements, and paying attention to the fact that blue light emission is obtained by irradiating a heavy metal with ultraviolet rays, and by irradiating such a ultraviolet ray, a heavy metal-containing glass can be easily prepared. It is an object of the present invention to realize a heavy metal-containing glass discriminator having a structure capable of making a distinction and capable of securing a large amount of ultraviolet irradiation to the glass to be measured.

[0005]

In order to achieve the above object, a heavy metal-containing glass discriminator according to the present invention comprises a case having an opening on one surface, and an ultraviolet lamp housed in the case. The UV radiation part of the UV lamp
A heavy metal-containing glass discriminator that is exposed in the opening of the case and that houses a reflection plate that reflects the ultraviolet light emitted from the ultraviolet radiation part of the ultraviolet lamp in the case toward the opening of the case. The ultraviolet lamp is an airtight container that is made of ultraviolet-transparent glass and that includes a straight tube portion that constitutes the ultraviolet radiating portion and a sealing portion that seals openings at both ends of the straight tube portion. A pair of discharge electrodes respectively arranged in the airtight container in the vicinity of both end sealing portions,
The airtight container is provided with an ultraviolet ray radiating gas, and the reflection plate has a parabolic portion whose cross section is a parabola, and a straight tube portion of the ultraviolet lamp.
It is characterized in that it is arranged on the focal point of the parabolic portion of the reflector.

In the heavy metal-containing glass discriminator of the present invention, the glass to be measured is irradiated with ultraviolet rays emitted from the ultraviolet ray emitting portion of the ultraviolet lamp and passing through the opening of the case to the outside. It is possible to easily determine whether or not the glass is a glass containing a heavy metal by visually observing whether or not blue-colored light emission specific to the heavy metal is obtained. Further, in the heavy metal-containing glass discriminator of the present invention, since the straight tube portion forming the ultraviolet ray emitting portion of the ultraviolet lamp is arranged on the focal point of the parabolic portion of the reflector, the straight tube portion emits light. Of the generated ultraviolet rays, the ultraviolet rays reflected by the parabolic portion can be guided toward the opening of the case as ultraviolet rays parallel to the central axis of the parabolic portion cross section. As a result, the ultraviolet rays radiated from the opening of the case can be concentrated and radiated in a fixed direction (direction parallel to the central axis of the parabolic section), and the UV irradiation amount on the glass to be measured can be reduced. Many can be secured.

The ultraviolet radiating portion of the ultraviolet lamp has a substantially U-shaped portion provided with a pair of straight pipe portions and a curved pipe portion for connecting and connecting the straight pipe portions.
You may use what was made into the character shape, and in this case, one straight pipe part is arrange | positioned on the focus of the parabolic part of the said reflector, and the other straight pipe part is the said reflector plate. It is placed close to the focal point of the parabolic part of.

As described above, by using the ultraviolet lamp having the two straight tube portions (a pair) constituting the ultraviolet radiating portion, it is possible to secure a larger amount of ultraviolet ray irradiation to the glass to be measured. it can. Since one straight tube portion of the ultraviolet lamp is disposed on the focal point of the parabolic portion of the reflecting plate, among the ultraviolet rays emitted from the straight tube portion, the ultraviolet ray reflected by the parabolic portion. Can be guided in the direction of the opening of the case as ultraviolet rays parallel to the central axis of the parabolic section. Further, since the other straight pipe portion is also disposed close to the focus of the parabolic portion of the reflection plate, among the ultraviolet rays emitted from the other straight pipe portion, the ultraviolet ray reflected by the parabolic portion is also the above. The central axis of the parabolic section cross section,
The ultraviolet rays can be guided in the direction of the opening of the case as substantially parallel ultraviolet rays.

A pair of linear portions may be extended from both ends of the parabolic portion of the reflection plate, and the tip of the linear portions may be projected outside the opening of the case.

As described above, the tips of the pair of linear portions extending from both ends of the parabolic portion of the reflecting plate are projected outside the opening of the case, so that the ultraviolet rays radiated to the outside of the case are multidirectional. It can be prevented from diffusing, and there is less risk of human beings being irradiated with harmful wavelength ultraviolet rays.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a heavy metal-containing glass discriminator according to the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 5, the heavy metal-containing glass discriminator 10 of the present invention includes a substantially rectangular parallelepiped resin case 12,
The front surface 14 of the case 12 is provided with an opening 16 formed by cutting a part of the case 12 into a substantially rectangular shape. Further, in the case 12, an ultraviolet lamp 18 is stored,
The ultraviolet radiation portion 20 of the ultraviolet lamp 18 is exposed at the opening 16. A switch 24 for lighting the ultraviolet lamp 18 is provided on the upper surface 22 of the case 12. Further, from the top surface 22 to the back surface 26 of the case 12 and from the bottom surface 28 to the back surface 26, the above-mentioned ultraviolet lamp
A plurality of heat dissipation holes 30 are provided to dissipate the heat generated by lighting of 18.

A power switch 34 and an adapter jack 36 for supplying an external power source of DC 12V are provided on the right side surface 32 of the case 12. As shown in FIG. 6, in the case 12, in addition to the ultraviolet lamp 18, a reflection plate 38
And a drive unit 40 that controls the lighting drive of the ultraviolet lamp 18.
Is stored. In FIG. 6, reference numeral 41 is a fixing member for fixing a pair of straight tube portions 42a and 42b of the ultraviolet lamp 18 described later.

As shown in FIG. 7, the ultraviolet lamp 18 has a pair of substantially cylindrical straight tube portions formed by bending a single elongated glass tube made of ultraviolet transparent glass such as quartz glass near the center. 42a, 42b and both straight pipe sections 42a, 42b
An airtight container 48 composed of a substantially U-shaped ultraviolet radiating part 20 having a curved tube part 44 for connecting and communicating with each other, and a sealing part 46 formed by melting and sealing both end openings of the ultraviolet radiating part 20. The airtight container
It is provided with a pair of discharge electrodes 50 respectively arranged in the vicinity of both end sealing portions 46 in 48, and a lead wire 52 connected to each discharge electrode 50. Further, the airtight container 48 is filled with an ultraviolet radiation gas formed by mixing argon and mercury, or an ultraviolet radiation gas mainly containing xenon. The discharge electrode 50 is made of molybdenum, tungsten, etc.,
The tip portion is exposed inside the straight pipe portion 42 that constitutes the ultraviolet radiation portion 20, and the base end portion is embedded in the sealing portion 46 of the airtight container 48. One end of a lead wire 52 is connected to the base end portion of the discharge electrode 50 embedded in the sealing portion 46, and the other end of the lead wire 52 is led to the outside of the airtight container 48. Thus, when a voltage is applied to the ultraviolet lamp 18 via the lead wire 52, a discharge is generated between the discharge electrodes 50, 50, and as a result, electrons collide with the ultraviolet radiation gas and have various wavelengths. Ultraviolet rays are generated, and the generated ultraviolet rays are transmitted to the outside through the ultraviolet ray emitting section 20 made of the ultraviolet ray transmitting glass.

The reflector 38 is made of an aluminum plate having a high efficiency of reflecting ultraviolet rays, and as shown in FIGS. 8 to 11, a parabolic portion whose cross section is a parabola expressed by the equation of Y = aX ^2. 54 and a pair of linear portions 56, 56 extending from both ends of the parabolic portion 54.

As shown in FIG. 11, the reflector plate 38 has its pair of linear portions 56, 56 with the tips thereof directed toward the opening 16 side of the case 12, and the linear portions 56, 56 of the case 12 are aligned with each other. It is arranged in the case 12 so as to be substantially parallel to the upper surface 22 and the bottom surface 28. Further, the tips of the linear portions 56, 56 pass through the opening 16 of the case 12 and project outside the case 12.

Further, the straight tube portion 42a of the ultraviolet lamp 18 is
42b is a space surrounded by the parabolic portion 54 of the reflection plate 38
As shown in FIG. 11, the straight tubes 42a and 42b of the ultraviolet lamp 18 are arranged in parallel on the central axis Y of the cross section of the parabolic portion 54, and are reflected. The cross section of the straight pipe portion 42b on the lower end 60 side of the plate 38 has a parabolic portion 54
Is located on the focal point F of. Therefore, due to the nature of the parabola, all the ultraviolet rays radiated to the parabolic portion 54 through the focal point F of the parabolic portion 54 are the central axis Y of the cross section of the parabolic portion 54.
Will be reflected in parallel with. Therefore, as mentioned above,
If the cross section of the straight tube portion 42b of the ultraviolet lamp on the lower end 60 side of the reflection plate 38 is arranged on the focal point F of the parabolic portion 54, the straight tube portion 42b concerned.
The ultraviolet rays reflected by the parabolic portion 54 among the ultraviolet rays emitted from the can be guided toward the opening 16 of the case 12 as ultraviolet rays parallel to the central axis Y of the cross section of the parabolic portion 54. As a result of arranging the cross section of the straight tube portion 42b of the ultraviolet lamp on the lower end 60 side of the reflector 38 on the focus F of the parabolic portion 54, the cross section of the other straight tube portion 42a also has the focus F of the parabolic portion 54.
Of the ultraviolet rays radiated from the other straight pipe portion 42a, the ultraviolet rays reflected by the parabolic portion 54 are also substantially parallel to the central axis Y of the cross section of the parabolic portion 54. Such ultraviolet rays can be guided toward the opening 16 of the case 12.

As described above, according to the present invention, the reflector 38
By arranging the cross section of the straight tube portion 42b of the ultraviolet lamp 18 on the lower end 60 side of the above on the focal point F of the parabolic portion 54 of the reflection plate 38, the ultraviolet rays radiated from the opening 16 of the case 12 are directed in a fixed direction. It is possible to concentrate and irradiate (in the direction substantially parallel to the central axis Y of the cross section of the parabolic portion 54), and it is possible to secure a large amount of ultraviolet ray irradiation to the glass to be measured. In addition, as a result that the ultraviolet rays emitted from the opening 16 of the case 12 can be concentrated and emitted in a certain direction, the case 12
Ultraviolet rays emitted from the opening 16 of the
There is little risk that humans will be exposed to ultraviolet rays of harmful wavelengths. As described above, the ends of the linear portions 56, 56 are cases.
Since it projects to the outside of the case 12, even the tips of the linear portions 56, 56 can prevent the ultraviolet rays radiated to the outside of the case 12 from diffusing in multiple directions.

Incidentally, the focus F of the parabolic portion 54 is the height (y) of the parabolic portion 54 shown in FIG.
It is calculated from the aperture width (x) according to the formula F = x ² / 16y. For example, the height (y) of the parabolic portion 54 is 19.6.
mm, the opening width (x) of the parabolic portion 54 is 38.0 mm,
From the above formula, the value of F is about 4.6 mm, which is the lower end of the reflector 38.
A focal point F exists on the central axis Y at a position of about 4.6 mm from 60.

Next, a method of using the heavy metal-containing glass discriminator 10 of the present invention having the above structure will be described. First,
When the opening 16 of the front surface 14 of the case 12 is directed to the glass to be measured, for example, the glass constituting a cathode ray tube, etc., the power switch 34 is turned on and the lighting switch 24 of the ultraviolet lamp 18 is turned on. Electric current is supplied to the ultraviolet lamp 18 via the section 40, and the ultraviolet lamp 18 emits light to emit ultraviolet light. The ultraviolet rays emitted are
It radiates to the outside of the case 12 through 16 and irradiates the glass to be measured. As described above, when a heavy metal such as lead is irradiated with ultraviolet light, blue light emission is obtained. Therefore, by visually observing the emission color of the glass to be measured, the glass is a glass containing a heavy metal. Whether or not it can be easily determined.

Of the ultraviolet rays emitted from the ultraviolet lamp 18, the ultraviolet rays that did not go to the opening 16 direction of the case 12 can be reflected by the reflector 38 and guided to the opening 16 direction. A large amount of ultraviolet rays emitted from the openings 16 of 12 can be secured.

[0021]

In the glass discriminator containing heavy metals of the present invention, the ultraviolet rays radiated from the ultraviolet ray radiating portion of the ultraviolet lamp and radiated to the outside through the opening portion of the case are transmitted to the glass to be measured. It is possible to easily determine whether or not the glass is a glass containing a heavy metal by irradiating and visually observing whether or not blue light emission peculiar to the heavy metal is obtained. Further, in the heavy metal-containing glass discriminator of the present invention, since the straight tube portion forming the ultraviolet ray emitting portion of the ultraviolet lamp is arranged on the focal point of the parabolic portion of the reflector, the straight tube portion emits light. Of the generated ultraviolet rays, the ultraviolet rays reflected by the parabolic portion can be guided toward the opening of the case as ultraviolet rays parallel to the central axis of the parabolic portion cross section. As a result, the ultraviolet rays radiated from the opening of the case can be concentrated and radiated in a fixed direction (direction parallel to the central axis of the parabolic section), and the UV irradiation amount on the glass to be measured can be reduced. Many can be secured.

[Brief description of drawings]

FIG. 1 is a front view showing a heavy metal-containing glass discriminator according to the present invention.

FIG. 2 is a plan view showing a heavy metal-containing glass discriminator according to the present invention.

FIG. 3 is a bottom view showing the heavy metal-containing glass discriminator according to the present invention.

FIG. 4 is a rear view showing the glass discriminator containing heavy metal according to the present invention.

FIG. 5 is a right side view showing a heavy metal-containing glass discriminator according to the present invention.

FIG. 6 is an explanatory view showing the internal structure of the glass discriminator containing heavy metals according to the present invention.

FIG. 7 is a cross-sectional view showing an ultraviolet lamp.

FIG. 8 is a front view showing a reflector.

FIG. 9 is a bottom view showing a reflector.

FIG. 10 is a side view showing a reflector.

11 is an enlarged cross-sectional view of a main part of AA of FIG.

[Explanation of symbols]

10 Heavy metal containing glass discriminator 12 cases 16 openings 18 UV lamp 20 UV radiation part of UV lamp 30 Heat dissipation hole 38 Reflector 42 Straight section of UV lamp 48 UV lamp airtight container 54 Parabolic part of reflector 56 Linear part of reflector 60 Bottom edge of reflector

Continued front page    (72) Inventor Yasuhiro Tomita             1003 Egawa, Gyoda-shi, Saitama Prefecture Okaya Electric Co., Ltd.             Saitama Manufacturing Co., Ltd. F-term (reference) 2G043 AA04 BA01 CA05 EA01 GA02                       GA06 GB01 HA02 KA02 KA03                       LA05 MA11                 5C043 BB01 CD10

Claims (3)

[Claims] 1. A case comprising a case having an opening on one surface and an ultraviolet lamp housed in the case, wherein the ultraviolet radiating part of the ultraviolet lamp is exposed at the opening of the case and is provided in the case. The ultraviolet ray radiated from the ultraviolet ray radiating portion of the ultraviolet lamp is a heavy metal-containing glass discriminator containing a reflection plate for reflecting toward the opening direction of the case, wherein the ultraviolet lamp is made of ultraviolet permeable glass, An airtight container provided with a straight pipe portion that constitutes the ultraviolet radiating portion and a sealing portion formed by sealing the openings at both ends of the straight pipe portion, and is arranged in the airtight container near both end sealing portions, respectively. A pair of discharge electrodes and an ultraviolet radiation gas filled in the airtight container are provided, and the reflection plate has a parabolic portion whose section is a parabola, and the ultraviolet lamp has a Straight pipe section Is disposed on the focal point of the parabolic portion of the reflection plate, the heavy metal-containing glass discriminator. 2. The ultraviolet radiating part of the ultraviolet lamp is formed in a substantially U shape having a pair of straight pipe parts and a curved pipe part for connecting and connecting both straight pipe parts, and one straight pipe part is formed. The straight pipe portion is disposed on the focal point of the parabolic portion of the reflector, and the other straight pipe portion is disposed close to the focal point of the parabolic portion of the reflector plate. Heavy metal containing glass discriminator. 3. The reflection plate has a pair of linear portions extending from both ends of the parabolic portion, and the tip of the linear portions is projected outside the opening of the case. The heavy metal-containing glass discriminator according to claim 1 or 2.