JP2000346024A - Luminescent bolts and luminous products - Google Patents

Abstract

(57) [Problem] To provide a light-emitting bolt that emits light for a long time regardless of ambient brightness, maintains a state that is easily visible, and has excellent handleability. SOLUTION: A luminous bolt 1 includes a bolt main body 2, a light storage section 3, and a fluorescent section 4. The bolt body 2 has a screw portion 5 having an external thread cut on the outer periphery, and a head portion 6 provided at one end of the screw portion 5. The light storing portion 3 is made of a light storing material, and is fitted and adhered to a concave portion 7 provided on the upper surface of the head 6. The light storage section 3 is formed by painting a persistence upper paint on a base material made of ceramics and firing the paint. The fluorescent portion 4 is made of a fluorescent material such as a fluorescent paint, and is provided on the upper surface of the head 6 around the concave portion 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a luminous bolt and a luminous product which emit light for a long time regardless of ambient brightness and have excellent visibility.

[0002]

2. Description of the Related Art Bolts have been well known as one of means used for fastening and connecting parts. A general bolt includes a screw portion formed by forming a male screw on the outer periphery of a round bar made of metal or the like, and a head provided at one end of the screw portion. Since this bolt is designed to be used only in a bright environment such as during the daytime, it is not suitable for handling in a dark environment such as at night. However, the handling of bolts is not limited to daytime only. Therefore, in order to improve visibility in dark conditions, it has been considered to apply a luminous paint (also called a phosphorescent paint) to the head or the like. Luminescent paint is ZnS, S
It is a paint that has a luminous property such as rS and a substance that emits phosphorescence as a main pigment, and when irradiated with visible light or ultraviolet light,
The light energy is absorbed and stored, and the stored energy is emitted again (light emission) even after the light irradiation is stopped.

[0003]

However, both the bolts coated with the luminous paint and the general bolts not coated with the luminous paint described above positively improve visibility in bright conditions such as daytime. No measures have been taken to make it more prominent than parts. For this reason, appearance of a bolt excellent in visibility for a longer time is desired regardless of the surrounding brightness and darkness. In addition, most of the conventional luminous paints have a short emission time (afterglow time) from several tens of minutes to about 1 to 2 hours, and therefore there is room for improvement in terms of the continuity of the effect. Such a problem can occur similarly for other products that are used regardless of day and night and require visibility, such as sign materials, guardrails, and various switches on the road, regardless of the bolt.

Therefore, an object of the present invention is to provide a light-emitting bolt and a light-emitting product which emit light for a long time regardless of the surrounding brightness, maintain a state in which the light is easily visible, and have excellent handleability.

[0005]

According to a first aspect of the present invention, there is provided a bolt body having a screw portion and a head provided at one end of the screw portion, and a light storage provided on the bolt body. A light storing section made of a material; and a fluorescent section provided on the bolt body and made of a fluorescent material. According to a second aspect of the present invention, in addition to the configuration of the first aspect, the luminous portion is formed by painting a persistence paint on a surface of a base material made of ceramics and firing the paint. Wherein the afterglow paint has at least Ca
O, MgO, relative to lead-free frit containing ZnO, wherein _{(M 1-pq Eu p Q} q) O · n (Al 1-m B m) 2 O 3 ( wherein, 0.0001 ≦ p ≦ 0.5 , 0.0001 ≦ q
≦ 0.5, 1.5 ≦ n ≦ 3.0, 0 ≦ m ≦ 0.5, M is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Ba and Zn. , Q are Mn, Zr,
Nb, Pr, Nd, Gd, Tb, Dy, Ho, Er, T
at least one selected from the group consisting of m, Yb and Lu
Are formed by mixing and heating the afterglow phosphor represented by the formula (1), which is a kind of co-activator, and pulverizing the obtained colored glass-like melt.

According to the first and second aspects of the invention, in a bright condition such as during the daytime, visible light or ultraviolet light is applied to the luminous bolt. The fluorescent portion provided on the bolt body emits light immediately in response to the light irradiation. Further, the light storage section provided in the bolt body absorbs and stores the energy of light accompanying the irradiation. On the other hand, under dark conditions such as at night, light irradiation is blocked or weakened. The fluorescent part stops emitting light, but the light storing part emits (emits) the stored energy again as light. In the light-emitting bolt, portions other than the light storage section become invisible or difficult to see. As described above, the fluorescent portion emits light in a bright condition, and the light storing portion emits light in a dark condition. In particular, when a material obtained by painting a base material with an afterglow paint and firing it (the light storing portion in the second invention) is employed, the light storing portion continues to emit light for a long time of 8 hours or more. The time during which light is emitted is further increased.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the light storing section and the fluorescent section are provided on an upper surface of the head.

According to the third aspect of the invention, when the luminous bolt is tightened or loosened using a tool such as a spanner or a wrench, the tool is mounted on the head, and the tool is mounted around the head. Rotate. At this time, the transmission of the force from the tool to the head is performed on the side surface of the head, and a large force is not applied to the light storage unit and the fluorescent unit provided on the upper surface of the head.

According to a fourth aspect of the present invention, in addition to the structure of any one of the first to third aspects, a concave portion is formed on an upper surface of the head, and the light storing section is It is fitted in the recess and adhered.

According to the fourth aspect of the present invention, the light storing portion is fitted into and bonded to the concave portion provided in the head of the light emitting bolt, and the portion except for the upper surface of the light storing portion is directly surrounded by the head. Protected. Therefore, compared to the case where the light storing portion is simply adhered to the upper surface of the head without providing the concave portion, a force from the outside (mainly from the side) is less likely to be applied to the light storing portion.

According to a fifth aspect of the present invention, there is provided a luminous product provided at least partially with a light storing portion made of a light storing material and a fluorescent portion made of a fluorescent material.

According to the fifth aspect of the invention, in a bright condition such as in the daytime, visible light or ultraviolet light is applied to the luminescent product. The fluorescent portion provided on at least a part of the light emitting product emits light immediately in response to the light irradiation. In addition, the light storage unit provided in at least a part of the light emitting product absorbs and stores light energy accompanying irradiation. On the other hand, under dark conditions such as at night, light irradiation is blocked or weakened. The fluorescent part stops emitting light, but the light storing part emits (emits) the stored energy again as light. As described above, the fluorescent portion emits light in a bright condition, and the light storing portion emits light in a dark condition.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which the present invention is embodied in a luminous bolt will be described below with reference to FIGS.

As shown in FIG. 1A, the luminous bolt 1
Includes a bolt body 2, a light storage section 3, and a fluorescent section 4. The bolt body 2 includes a screw portion 5 formed by forming a male screw on the outer periphery of a round bar, and a head portion 6 provided at one end of the screw portion 5.
And The head 6 has a low hexagonal column shape, and a flat circular recess 7 is formed on the upper portion thereof by a method such as cutting. The disc-shaped light storing portion 3 is fitted into the concave portion 7 and fixed by an adhesive.

The light storage section 3 is the same as the "product using an afterglow paint" disclosed in Japanese Patent Application Laid-Open No. 10-194871. More specifically, the light storage section 3 is formed by applying a later-described afterglow paint, which will be described later, on a surface of a disk-shaped substrate made of ceramics (including tiles), glass, fine ceramics, or the like, using a general painting method, for example, It is formed by painting according to a silk screen printing method, a spraying method, a brush method, a brush coating method, etc., and baking and baking at a temperature of 800 to 850 ° C. for 6 to 8 hours. For example, there are green, yellow, blue and the like as the coloring color. Painting may be performed on at least the upper surface of the base material. In addition, the painting may be performed on the entire upper surface or may be performed on only a part of the upper surface. In the latter case, an arbitrary pattern or the like may be drawn.

The afterglow paint has a lead-free frit against a boaluminate afterglow phosphor (hereinafter simply referred to as "afterglow phosphor").
Is mixed and heated, and the solid content of the obtained colored glass-like melt is roughly pulverized and finely pulverized, and a binder and a solvent are mixed with the powder obtained through a sieve.

The frit is a glass component that melts at a low temperature. The lead-free frit contains at least CaO,
It contains MgO and ZnO, but other than SiO
₂ , Al ₂ O ₃ , K ₂ O, Na ₂ O, and B ₂ O ₃ . However, the lead-free frit does not contain lead such as lead oxide or cadmium such as cadmium oxide. When these components are contained, when a phosphorescent material is added to the frit and baked, lead or cadmium reacts with the phosphorescent material, and the frit may be blackened and the product value may be impaired.

The preferred composition ratio of the lead-free frit is Si
O ₂ (25 to 60% by weight), Al ₂ O ₃ (5 to 15% by weight), CaO (10% by weight or less, excluding 0), M
gO (2 wt% or less, excluding 0), ZnO (2 wt% or less, excluding 0), K ₂ O (2~4 wt%), Na ₂ O (4~8 wt%), B ₂ O ₃ (10-2
5% by weight). The lead-free frit is obtained by weighing and mixing and dissolving an oxide and a carbonate compound having the composition in the above range. By using such a lead-free frit, it does not react with the afterglow phosphor even in a high temperature atmosphere at the time of firing, and the function of the afterglow phosphor can be sufficiently exhibited. Further, the lead-free frit is excellent in weather resistance, heat resistance, corrosion resistance, and stain resistance, and enables the phosphorescent unit 3 to be used for a long time.

The afterglow phosphor has a specific composition represented by the following formula (1). _{(M 1-pq Eu p Q} q) O · n (Al 1-m B m) 2 O 3 ... (1) In the formula, 0.0001 ≦ p ≦ 0.5, 0.0001 ≦ q ≦ 0 0.5, 1.5 ≦ n ≦ 3.0, and 0 ≦ m ≦ 0.5. M is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Ba and Zn, and among them, Sr is particularly preferable. Q is Mn, Zr, Nb,
Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Y
at least one coactivator selected from the group consisting of b and Lu.

The afterglow phosphor is prepared by mixing the following materials with the above composition.
Mix well in a mixer as described
After first firing for several hours at a temperature of ~ 1600 ° C, weakening
Secondary at a temperature of about 1200 to 1600 ° C in an original atmosphere
Calcined, obtained by crushing the calcined product and sieving
Can be Raw materials for the afterglow phosphor include SrO, Al _Two 
O_Three , Eu_Two O_Three Metal oxides such as SrCO_Three Firing of etc.
Compounds that readily become oxides at elevated temperatures are suitable. So
In addition, use nitrates, oxalates, hydroxides, etc.
You can also. Note that the emission characteristics depend on the purity of the raw material.
Therefore, these raw materials have a purity of 99.9% or more.
And it is more than 99.99%
Is preferred.

When boron is included in the composition of the afterglow phosphor, the phosphor base material (alumina) is converted into boroaluminic acid.
G) is improved in crystallinity. In addition, the afterglow time (time after which the afterglow of the light storage unit 3 can be visually recognized in the dark after the light irradiation is stopped), for example, the emission center and the capture center are stabilized and the afterglow luminance is increased.
And the afterglow brightness is improved. In order to introduce boron into the composition, it is effective to add a boron-containing compound as a flux and fire the mixture. Such compounds include:
Boric acid or a borate of an alkaline earth element can be used, and boric acid is particularly preferred. Most of the added boric acid is introduced into the composition of the afterglow phosphor. Boron is preferably added so that the amount m of boron for substituting aluminum belongs to the range of 0.0001 to 0.5, more preferably 0.001 to 0.5.
In the range of 5 to 0.25, most preferred is around 0.05. The introduction of boron is effective not only for improving the light emission performance of the afterglow phosphor but also for lowering the coefficient of thermal expansion of the afterglow paint.

The above-mentioned afterglow phosphor basically emits strong light due to divalent Eu as an activator, but divalent Eu absorbs light in a wide range from visible light to ultraviolet light, and therefore has a phosphorescent property. The part 3 emits light with high efficiency (fluorescence) when excited in a wide wavelength range such as natural light. So, of course, sunlight,
It emits light when excited by artificial lighting such as incandescent lamps and fluorescent lamps.

The activator and coactivator introduced into the afterglow phosphor are related to the fluorescent color and the afterglow luminance, and the concentration range is important for practical use. For example, the preferable range of the concentration p of the activator Eu introduced into the afterglow phosphor is 0.001 to 0.0.
6.

When the co-activator is Mn, Zr, Nb, Pr, N
d, Gd, Tb, Dy, Ho, Er, Tm, Yb and L
Although at least one selected from the group consisting of u has already been described, as the coactivator, it is preferable to use two types selected from the group described above.
In the case of these two types of use, the first co-activator and the second co-activator can be considered separately. As the first coactivator, Dy, Nd, Pr, Ho and Er are mainly used. When the divalent metal M in the phosphor composition formula is particularly Sr, Dy, Pr, Tm, Ho and Er are effective for improving the afterglow luminance, and in this case, the emission color is in the blue-green region.

When Dy is selected as the first coactivator, the optimum range of the Dy concentration q on the luminous performance is 0.00
05 to 0.03. When Dy is selected as the first co-activator and Mn is selected as the second co-activator,
The preferable range of the concentration q is 0.0001 to 0.06, and the more preferable range is 0.0005 to 0.02. When Dy is selected as the first coactivator and Tm is selected as the second coactivator, the preferable range of the Tm concentration q is 0.0003 to 0.02, and the more preferable range is 0.1 to 0.03.
0004 to 0.01. Dy as the first co-activator
Is selected, and Lu is selected as the second co-activator,
The preferable range of the Lu concentration q is 0.0001 to 0.06.
The more preferable range is 0.0004 to 0.04. When Dy is selected as the first coactivator and Nb is selected as the second coactivator, the preferable range of the Nb concentration q is 0.0001 to 0.08, and the more preferable range is 0.0003. ~ 0.04.

Dy was selected as the first co-activator,
When Yb is selected as the coactivator, the preferable range of the Yb concentration q is 0.0002 to 0.04, and the more preferable range is 0.0003 to 0.01. When Dy is selected as the first co-activator and Zr is selected as the second co-activator, a preferable range of the Zr concentration q is 0.002 to 0.002.
0.70. Selecting Dy as the first co-activator,
When Er is selected as the second co-activator, the Er concentration q
Is preferably 0.0001 to 0.03, and more preferably 0.0005 to 0.02. First
When Dy is selected as the coactivator and Pr is selected as the second coactivator, the preferable range of the Pr concentration q is 0.1.
0001 to 0.04, and a more preferred range is 0.1 to 0.04.
0005 to 0.03.

Total oxides of divalent metal, activator and co-activator
The mole number and the total mole number of alumina and boric acid were approximately 1: 2,
That is, when n = 2, the substitution of boron is about 1 mol%.
At low concentrations, SrAl to be generated from the charge composition_Four O₇ 
However, when the concentration of boron is higher than this, Sr_Four 
Al₁₄O_{twenty five}Structure and SrAl₁₂O₁₉A mixture of structures.
Especially in these crystal structures,
The important thing is Sr_Four Al ₁₄O_{twenty five}Structure, which is orthorhombic
Belongs to the system. Crystal structure by introducing a predetermined amount of boron
Change, and the afterglow is improved. In particular, n = 1.75
In the near case, blue-green emission with a peak wavelength of 490 nm is the strongest.
High purity S as expected from the raw material charge
r_Four Al₁₄O_{twenty five}An afterglow phosphor of the structure is obtained. This residue
Light-emitting phosphors have excellent heat and weather resistance,
It can fully satisfy the purpose of painting afterglow
Wear. This Sr_Four Al₁₄O_{twenty five}The structure of the afterglow phosphor is 1.
It is obtained in the range of 5 ≦ n ≦ 3.0, and particularly, 1.7 ≦ n ≦
It is obtained as a main component in the range of 2.1.

On the other hand, when the total number of moles of the oxides of the divalent metal, activator and co-activator and the total number of moles of alumina and boric acid are approximately 1: 1, that is, n = 1, The crystal structure is a SrAl ₂ O ₄ type monoclinic system, and emits green light having a peak at a wavelength of 520 nm. This phosphor also exhibits afterglow, but when heated at a high temperature, the afterglow luminance is greatly reduced. In addition, since the afterglow paint using this phosphor has a large coefficient of thermal expansion and a high glass transition temperature of 780 ° C., it is not suitable for an afterglow paint that requires high afterglow.

In the afterglow paint, the afterglow phosphor is preferably blended in an amount of 2 to 100 parts by weight based on 100 parts by weight of the lead-free frit. In particular, when the content is 2 to 40 parts by weight, gloss appears on the painted surface, making it difficult to stain. When it is 40 to 70 parts by weight, it is semi-matte, and when it is 70 to 100 parts by weight, it is matte (matte).

Further, an inorganic pigment may be added to the afterglow paint as needed. The inorganic pigments here are pigments generally used particularly in the ceramic industry, for example, Turkish blue, lemon yellow, malon, peacock, navy blue, red brown, copper oxide, neodymium oxide, erbium oxide, zirconium oxide, oxidized oxide Iron and the like. The preferred compounding ratio of the inorganic pigment is 10% by weight or less, and
It is 2-3 parts by weight of the inorganic pigment based on parts by weight. Depending on the type of inorganic pigment used, the surface to be painted may be mat-like, semi-matte-like, or have a gloss. However, since the particle size of the inorganic pigment is very small compared to the average particle size of the afterglow phosphor, simply adding water and mixing them will cause the difference in the particle size or specific gravity of the afterglow phosphor. Inorganic pigments lose their balance, and the composition tends to be biased, resulting in fading and uneven afterglow color tone.

Therefore, when adding an inorganic pigment, the lead-free frit, the afterglow phosphor, and the inorganic pigment are once mixed, and the mixture is fired at a temperature of about 850 ° C. to melt into a colored glass. The colored glass is then coarsely and finely ground,
It is preferable to obtain a powder of afterglow over paint by passing through a sieve of about 0 mesh. In this way, the afterglow phosphor and the inorganic pigment are almost uniformly mixed in the vitreous particles (melted lead-free frit). Since the mixing ratio of the afterglow phosphor and the inorganic pigment in the vitreous particles is almost constant, there is no concern about color separation of the afterglow paint. Of course, the above method is applicable even when an inorganic pigment is not used,
Even in that case, afterglow color unevenness is reduced.

The binder is for adhering the afterglow phosphor and the lead-free frit to the surface of the substrate (ceramic), and is burned out during firing. Examples of the binder include types commonly used for paints such as carboxymethylcellulose (CMC), gum arabic,
An emulsion type in which squeegee oil or the like is added to water can be used. The binder is preferably blended in an amount of 20 to 40 parts by weight based on 100 parts by weight of the solid content. Mixing of the afterglow paint and the binder is performed using a raikai machine or the like so that the powder solids are uniformly suspended.
Since the binder disappears during firing, water may be used instead of the binder. That is, the afterglow phosphor and the lead-free frit can be kneaded in water and applied to the surface of the ceramic.

Here, the glass transition temperature of the afterglow
Regarding this, a lower one is preferable. This is baking at low temperature
More specifically, afterglow phosphors are
Less susceptible to damage, reducing afterglow brightness and afterglow time
Because it is hard to do. FIG. 2 shows the temperature of the afterglow
The relationship with the coefficient of thermal expansion is shown by a solid line. Afterglow used as sample
Sex paints are (Sr_0.970 Eu_0.01Dy_0.02) O ・ 1.78
(Al_0.986 B_0.014)_Two O_Three Afterglow phosphor represented by
25% by weight and 75 layers of lead-free frit consisting of the following components
%. Lead-free frit is made of SiO_Two (50.6
Wt%), Al _Two O_Three (10.2% by weight), CaO
(6.1% by weight), MgO (1.6% by weight), ZnO
(1.0% by weight), K_Two O (1.1% by weight), Na_Two O
(7.6% by weight) and B_Two O_Three (21.8% by weight)
Become. FIG. 2 shows a base material (here,
Indicates the relationship between the temperature of the tile) and the coefficient of thermal expansion by a broken line.

According to FIG. 2, in the range of about 100 to about 650 ° C., the coefficient of thermal expansion increases almost linearly as the temperature increases. However, when the temperature exceeds about 650 ° C., the rate of increase of the thermal expansion coefficient with respect to the temperature rise sharply increases, and reaches a peak at around 750 ° C. At a temperature higher than 750 ° C., the thermal expansion coefficient conversely increases regardless of the temperature rise. It is getting smaller. The peak around 750 ° C. is a glass transition temperature, and in a temperature range higher than this, it means that the afterglow paint is glassy. Since the glass transition temperature is low, the afterglow paint can be printed at a lower temperature.

It is preferable that the coefficient of thermal expansion of the afterglow paint is smaller, and it is more preferable that the coefficient of thermal expansion be smaller than that of the base material. This is because if the coefficient of thermal expansion of the afterglow paint is smaller than the coefficient of thermal expansion of the base material, the afterglow paint will have a compression (compression) relationship in the process of thermal expansion. If the thermal expansion coefficient is larger than the thermal expansion coefficient, the material has a tension (tensile) relationship, and causes penetration (cracks generated after firing) and peeling. According to FIG. 2, the afterglow upper paint has a smaller coefficient of thermal expansion than the base material, and has a compression (compression) relationship during the process of thermal expansion except for the vicinity of the glass transition temperature of the afterglow upper paint. Understand. For this reason, the penetration and peeling of the painting are basically unlikely to occur.

FIG. 3 shows the type of lead-free frit.
9 shows the relationship between the temperature and the coefficient of thermal expansion in the case where the temperature is changed. Trial
The afterglow paint used as a pigment was the same as that used in Fig. 2.
Same afterglow phosphor (25% by weight) and lead-free frit a,
b, c, d (all 75% by weight). Lead-free
The components of lit a are the same as those used in FIG. Nothing
The component of the lead frit b is different from the component of the lead-free frit a by Ca
O, and specifically, SiO 2_Two (53.
9% by weight), Al_Two O_Three (10.8% by weight), MgO
(1.7% by weight), ZnO (1.1% by weight), K_Two O
(1.2% by weight), Na_Two O (8.1% by weight) and B_Two 
O_Three (23.2% by weight). The lead-free frit c is
Lead-free frit a with MgO removed
Contains SiO_Two(51.4% by weight), Al_Two O_Three (1
0.4% by weight), CaO (6.2% by weight), ZnO
(1.0% by weight), K_Two O (1.1% by weight), Na_Two O
(7.7% by weight) and B_Two O_Three (22.2% by weight)
Become. Lead-free frit d removes ZnO from lead-free frit a.
In detail, SiO_Two (51.1 weight
%), Al _Two O_Three (10.3% by weight), CaO (6.2
Wt.), MgO (1.6 wt.%), K_Two O (1.1 weight
%), Na_Two O (7.7% by weight) and B_Two O_Three (2
2.0% by weight).

According to FIG. 3, the afterglow paint using lead-free frits b to d has a higher glass transition temperature and a larger coefficient of thermal expansion than the afterglow paint using lead-free frit a. Has become. This tends to be undesirable as an afterglow paint, and the types of substrates that can be used are limited. In addition, the afterglow paint using the lead-free frit b containing no CaO has a drawback that the coloring property is poor and the melting property is reduced. An afterglow paint using a lead-free frit c containing no MgO has a disadvantage that thermal expansion becomes large.
An afterglow paint using a lead-free frit d containing no nO has drawbacks in that the meltability is reduced and the thermal expansion is increased.

As shown in FIG. 1A, the fluorescent portion 4 is formed of a film formed around the concave portion 7 on the upper surface of the head 6. This film is formed by applying a fluorescent paint which is a fluorescent material. The fluorescent paint is a paint obtained by kneading an inorganic phosphor or an organic phosphor as a main pigment and kneading it with a color change agent, for example, zinc, cadmium, barium,
Sulfides such as strontium, or organic pigments such as auramine tungstate, rhodamine tungstate, and sodium red lake C are used as fluorescent pigments. The fluorescent colors of zinc sulfide and zinc cadmium fluorescent paints range from blue to green, yellow, orange and red. It is also possible to make the fluorescent color white by mixing two colors. As such a fluorescent paint, a commercially available paint can be used. In addition, in order to enhance the adhesion between the fluorescent portion 4 and the head 6, a portion to be coated with the fluorescent paint may be roughened (uneven) in advance. Alternatively, a shallow concave portion may be formed on the upper surface of the head 6, and a fluorescent paint may be applied thereon.

According to the light-emitting bolt 1 of the present embodiment configured as described above, the light-emitting bolt 1 is irradiated with visible light or ultraviolet light in a bright condition such as during the daytime. FIG. 1 (a)
As shown by hatching, the annular fluorescent portion 4 emits (emits) light while being excited by the energy of the irradiated light. In addition, the light storage unit 3 absorbs and stores the energy of light accompanying the irradiation. Since the upper surface of the head 6 is conspicuous and bright due to the light emitted from the fluorescent portion 4, the position of the light-emitting bolt 1 can be easily and reliably found.

On the other hand, under dark conditions such as at night, light irradiation is cut off or weakened. In addition, since the luminous bolt 1 is attached and detached at the time of maintenance and inspection of a machine, a device, and the like, the luminous bolt 1 may fall into the machine or the like inadvertently during the work. At this time, even in the daytime, the dropped part may be dark. In such a case, the fluorescent part 4 does not emit light because there is no light irradiation. However, as shown by oblique lines in FIG. Emit (emit). Disc-shaped phosphorescent unit 3
The light-emitting bolt 1 emits blue-green light, for example, so that the light-emitting bolt 1 can be easily and reliably found by the light. It is possible to prevent a trouble that maintenance and inspection work is delayed because bolts cannot be found. Further, the subsequent work, for example, the work of tightening or loosening the luminous bolt 1 is facilitated.

In particular, according to the light storing section 3 of the present embodiment, light energy is effectively absorbed by the light storing section 3 and stored.
Light emission is performed efficiently, and as a result, the light emission continues for a long time as compared with the conventional phosphorescent material. Incidentally, the luminous bolt 1 was illuminated with a white fluorescent lamp at 300 lux for 2 hours to excite the afterglow phosphor, the illumination was stopped, and the afterglow time was measured. It was long. As described above, in the light-emitting bolt 1 of the present embodiment, the fluorescent portion 4 emits light in a bright condition, and the light storing portion 3 emits light in a dark condition, and these lights exhibit a position display function. The luminous bolt 1 emits light for a long time irrespective of the surrounding brightness, maintains a state that is easy to see, and is excellent in handleability as compared with a conventional bolt in which luminous paint is applied to the head 6 or the like.

This embodiment has the following features in addition to the items described above.

(A) The form of light emission (shape of the light emitting portion) differs between a bright situation such as daytime and a dark situation such as nighttime. Here, the form refers to the shape, size, light intensity, light color, and the like of the light emitting portion. For this reason, the decorative effect can be enhanced by changing the light emission, and the light-emitting bolt 1 is also excellent in design. The change in the color of light can be dealt with by changing the type of inorganic pigment added to the afterglow paint.

(B) The location where the light storing section 3 and the fluorescent section 4 are provided is the upper surface of the head 6, and this location is exposed to the outside without directly participating in the tightening or joining of parts in a machine or the like. It is a place to do. Therefore, the effect of improving visibility by the light storing section 3 and the fluorescent section 4 can be most expected.

(C) When the luminous bolt 1 is tightened or loosened using a tool such as a spanner or a wrench, the tool is mounted on the head 6 and the tool is rotated about the head 6. At this time, the transmission of the force from the tool to the head 6 is mainly performed on the side surface of the head 6. A large force is not applied to the light storing section 3 and the fluorescent section 4 provided on the upper surface of the head 6. For this reason, the light storing part 3 and the fluorescent part 4 are less likely to be peeled, abraded, scratched, broken, etc., have excellent durability, and maintain the light emitting performance for a long time.

(D) The light storing section 3 is fitted into a concave portion 7 provided in the head 6, and the portion except the upper surface of the light storing section 3 is just surrounded by the head 6 and protected.
In addition, the light storage section 3 is bonded to the recess 7. For this reason, compared to the case where the light storing portion 3 is simply adhered to the upper surface of the head 6 without providing the concave portion 7, an external force is less likely to be applied to the light storing portion 3, and the light storing portion 3 does not easily fall off.

(E) When manufacturing the luminous bolt 1,
A recess 7 is provided in the head 6 of the bolt body 2, and the light storing section 3 is provided here.
And a simple work of applying a fluorescent paint around the recess 7 on the upper surface of the head 6.

The present invention can be embodied in another embodiment shown below.

(1) The luminescent bolt of the present invention can be used as a scaffolding bolt in addition to fastening and connecting parts.
Scaffolding bolts are attached to utility poles and used as scaffolds to move up and down utility poles and to work on utility poles. Even in this case, the position of the scaffolding bolt is easy to understand regardless of the daytime or nighttime, and it is easy to go up and down, and there is no risk of mistaking the position. In this case, the positions of the light storing section 3 and the fluorescent section 4 may be changed to a position other than the head 6.

(2) The luminous bolt of the present invention can be used as a fastening part for fixing a guardrail to a pillar or the like. In this case, the light-emitting bolt 1 emits light day and night, so that the driver or the like of the vehicle can quickly know the presence of the guardrail while traveling, even from a distance. Also,
Since the light-emitting bolt 1 having the phosphorescent part 3 and the fluorescent part 4 is used for the installation work of the guardrail, there is no need to perform any processing for light emission after the work.

(3) In the light-emitting bolt 1, the light-storing portion 3 and the fluorescent portion 4 need only be provided on at least a part of the bolt main body 2, and the shape, size, number, and position are not particularly limited. As the shape of the light storage section 3, for example, FIG.
The shape may be annular as shown in FIG. 4A, polygonal as shown in FIG. 4B, or semicircular (not shown). Since the fluorescent portion 4 is formed by applying a fluorescent paint, the shape of the fluorescent portion 4 is less restricted than the light storing portion 3. The number may be one or more. The position where the light storage section 3 and the fluorescent section 4 are provided is not limited to the upper surface of the head 6, and may be a side surface of the head 6 or a place where the screw 5 is not formed. FIG. 4 (a)
4 shows a case where the fluorescent portion 4 is formed at the center of the upper surface of the head 6, and FIG. 4B shows a case where the fluorescent portion 4 is formed in a band shape over the entire circumference on the side surface of the head 6. .

(4) The light storing section 3 and the fluorescent section 4 may be provided on a nut screwed to the luminous bolt 1, or may be provided on a component which is fastened or coupled by the luminous bolt 1. . In the latter case, if the fluorescent part 4 and the light storing part 3 are provided around the screw hole, the position of the screw hole can be easily understood.

(5) The present invention provides, in addition to the luminous bolt,
The invention can be applied to a light-emitting product in which at least a part has a light storing part made of a light storing material and a fluorescent part made of a fluorescent material. The luminescent product can be a target as long as it is used regardless of ambient brightness (however, excluding products having fluidity such as gas and liquid). For example, marking materials on roads and the like (including lane markings, stop lines, strip lines such as pedestrian crossing lines, symbols, letters, etc.), guardrails, guidance sign studs installed on indoor and outdoor passageways, scaffolds , Outlets, various switches, locks, seat belt buckles, wheelchairs, rings, and other accessories (accessories), indoor and outdoor decorations, and the like, but are not limited thereto.

(6) A fluorescent adhesive tape may be used instead of the fluorescent paint. For example, in the case of the luminous bolt 1 in the above-described embodiment, instead of applying the fluorescent paint, a fluorescent adhesive tape may be attached to the head 6 or the like of the bolt main body 2 and this may be used as the fluorescent portion 4.

[0055]

As described above, according to the first, second, and fifth aspects of the present invention, light is emitted for a long time regardless of the surrounding brightness, the state in which the light is easily visible is maintained, and the handleability is excellent. Luminescent bolts and luminescent products can be provided.

In particular, in the light-emitting bolt according to the second aspect of the present invention, the light storing section continuously emits light with high afterglow luminance for a very long time of 8 hours or more. In addition, by using an afterglow paint having a smaller coefficient of thermal expansion than the base material, it is possible to prevent penetration and peeling of the painting. Further, the painted phosphorescent surface can be made glossy to make it less likely to be stained. In addition, the emission color of the light storage section can be variously changed by blending an inorganic pigment into the afterglow paint.

According to the third aspect of the invention, in addition to the effects of the first or second aspect, even if the light-emitting bolt is tightened or loosened using a tool, the light-storing portion and the fluorescent portion are peeled off, worn, and damaged. Adhesion, breakage and the like can be prevented, and durability can be improved.

According to the fourth aspect, in addition to the effect of any one of the first to third aspects, it is possible to reliably prevent the light storage section from dropping from the head.

[Brief description of the drawings]

FIGS. 1A and 1B are perspective views of a light-emitting bolt according to an embodiment of the present invention.

FIG. 2 is a graph showing a relationship between a temperature and a coefficient of thermal expansion for an afterglow paint and a base material.

FIG. 3 is a graph showing a relationship between a temperature and a coefficient of thermal expansion for an afterglow paint using various lead-free frits.

FIGS. 4A and 4B are perspective views showing another embodiment of a luminous bolt.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Luminous bolt 2 Bolt body 3 Luminescent part 4 Fluorescent part 5 Screw part 6 Head 7 Recess

Claims (5)

[Claims] A bolt body having a screw portion and a head provided at one end of the screw portion; a light storing portion provided on the bolt body and made of a light storing material; A luminous bolt, comprising: a fluorescent part made of a material. 2. The phosphorescent part is formed by painting an afterglow upper paint on a surface of a base material made of ceramics and firing the same, and the afterglow upper paint is at least CaO, MgO , Zn
To lead-free frit containing O, formula _{(M 1-pq Eu p Q} q) O · n (Al 1-m B m) 2 O 3 ( wherein, 0.0001 ≦ p ≦ 0.5,0.0001 ≤q
≦ 0.5, 1.5 ≦ n ≦ 3.0, 0 ≦ m ≦ 0.5, M is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Ba and Zn. , Q are Mn, Zr,
Nb, Pr, Nd, Gd, Tb, Dy, Ho, Er, T
at least one selected from the group consisting of m, Yb and Lu
And a mixture formed by mixing and heating an afterglow phosphor represented by the formula (1), and crushing the obtained colored glass-like melt. 2. The luminous bolt according to 1. 3. The light-emitting bolt according to claim 1, wherein the light storing portion and the fluorescent portion are provided on an upper surface of the head. 4. The head according to claim 1, wherein a concave portion is formed on an upper surface of the head, and the light storing portion is fitted into and bonded to the concave portion. Luminous bolt. 5. A luminous product characterized in that at least a part thereof is provided with a luminous part made of a luminous material and a fluorescent part made of a fluorescent material.