JP5500331B2 - Method for manufacturing phosphorescent evacuation guidance sign - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for producing a phosphorescent evacuation guide sign such as an indoor guide sign board, a safety sign board in a subway or underground parking lot, and a safety guidance display board.

Conventionally, as an evacuation guidance sign for safely evacuating from the inside of a building during a power outage such as a disaster, there are an internal illumination type evacuation guidance sign (internal illumination type sign) and a phosphorescent type evacuation guidance sign (photoluminescent type sign) .
Of these, internally-illuminated signs are often used to indicate emergency exits in current buildings.
Specifically, the structure shown in FIGS. 3 and 4 is provided, and the front display board 300 uses a translucent acrylic board or polycarbonate board, and is provided with letters and figures of evacuation guidance information. Yes.

A fluorescent lamp is disposed as the light source unit 200 in the instrument 400 to which the display board 300 is attached.
When the power is interrupted due to a disaster or trouble, the light source 200 is turned on with the power stored in a battery (not shown) built in the appliance 400.
However, the amount of electricity stored in this battery is limited to lighting for about 20 minutes.
For this reason, it was not suitable for use in places that require more than 20 minutes to evacuate, such as large buildings and subways.

In order to compensate for the disadvantages of this internally illuminated sign, a phosphorescent sign has been proposed.
This type of ordinary phosphorescent evacuation guidance sign has a structure of a transparent protective layer, a design display, a phosphorescent layer, and a white reflective layer as described in the luminous signboard of JIS Z9107 (safety signboard).

This kind of phosphorescent mark has a structure shown in FIGS.
In other words, the phosphorescent label includes a white reflective layer 500 in which a white acrylic plate is bonded to the back side of the phosphorescent layer 100 containing a phosphorescent pigment with an adhesive (acrylic adhesive), and a transparent protective layer 700 having a design 600 printed on the front side. The structure which adhered is equipped.
However, this kind of phosphorescent sign cannot be used in place of the internally illuminated sign display board 300 shown in FIGS.
For this reason, it has been necessary to remove all of the conventional internally-illuminated signs and provide a new phosphorescent-type sign, which causes a problem of increasing costs.
Utility Model Registration No. 3034075 Utility Model Registration No. 3008899 JP 2007-21819 A JP 2006-293168 A

The present invention has been made in view of the circumstances as described above, and has a compatibility with conventional internally illuminated signs and a method for producing a phosphorescent evacuation guidance sign that does not lose the function of evacuation guidance for 20 minutes or more after a power failure. The purpose is to provide.

In order to achieve the above object, in the method for producing a phosphorescent evacuation guidance sign according to the present invention, a mixture in which a phosphorescent pigment is mixed with a transparent thermosetting resin is shaped into a shape that can recognize the sign on the outer peripheral side. And a step of performing centrifugal molding while heating, and a step of attaching a phosphorescent sheet created by this step to one side of an instrument having a light source unit. And

The present invention has the following effects.
According to the manufacturing method of the phosphorescent evacuation guidance sign of the invention described in claim 1, it is possible to easily produce a product in which most phosphorescent pigments are contained in the groove.

According to claim 2 method for producing phosphorescent evacuation signs invention described, there almost phosphorescent pigment in a portion other than the groove, light permeability can be made good transparency crests.
According to the method for producing a phosphorescent evacuation guidance sign according to the third aspect of the present invention, the sign can be recognized without providing a sign part again.

Hereinafter, the best mode for carrying out the present invention will be described.
The best mode for carrying out the invention will be described with reference to FIGS.
FIG. 1 is a front view showing a phosphorescent evacuation guidance sign according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.

An embodiment according to the present invention will be described with reference to FIGS.
The phosphorescent evacuation guidance sign according to the present invention includes the phosphorescent sheet 1 including a valley portion 14 where a large amount of the phosphorescent pigment 13 is present and a mountain portion 15 where the phosphorescent pigment 13 is hardly present.
And the light of the fluorescent lamp which is the light source part 2 arrange | positioned in the instrument 4 is interrupted | blocked by the trough part 14 of the phosphorescent sheet 1, and passes the peak part 15. FIG.
For this reason, the function as an evacuation guidance sign is exhibited even if it does not provide a sign part again by making the shape of the valley part 14 or the peak part 15 into the form which can be recognized as a sign.
In addition, after the light from the light source unit 2 disappears, the sign can be recognized by the light emitted from the phosphorescent pigment present in the valley portion 14 of the phosphorescent sheet 1.

However, it is good also as an aspect which provides the label | marker part 3 in the other side surface side of the phosphorescent sheet 1 as shown in FIG.1 and FIG.2.
In this case, after the light from the light source 2 passes through the peak 15 and the light from the light source 2 disappears, the light emitted from the phosphorescent pigment 13 existing in the valley 14 causes Can recognize signs.

The phosphorescent sheet 1 is obtained by kneading phosphorescent pigment 13 in a transparent polyurethane material.
The urethane material of this example is a cast urethane material, in which a main material having a reactive group (—NCO) called a prepolymer and a curing agent (amine system) react to become polyurethane. .
The amount of the luminous pigment 13 kneaded into the transparent polyurethane material is the maximum, and the total amount of the luminous pigment 13 is an amount that fits in the valley portion 14.
Thereby, there is almost no phosphorescent pigment 13 other than the trough part 14 of the phosphorescent sheet 1, and transparency is ensured.

Furthermore, the particle diameter of the phosphorescent pigment 13 used is preferably 100 μm or more.
As a result, even if a small amount of the phosphorescent pigment 13 is present, the light of the fluorescent lamp can be transmitted well and the recognition of the marker portion can be ensured.
In addition, the phosphorescent sheet 1 is first charged with a transparent thermosetting resin containing the phosphorescent pigment 13 in a centrifugal mold having a groove formed on the outer peripheral portion, and centrifugally molded while being heated.
By producing in this way, most of the phosphorescent pigment 13 having a larger specific gravity than the transparent thermosetting resin is biased in the groove provided on the outer peripheral side.

For this reason, since the phosphorescent pigment 13 does not exist on the surface opposite to the side where the valley portion 14 of the phosphorescent sheet 1 is provided, the phosphorescent sheet 1 has a glossy surface, and therefore, a sign is directly printed on the phosphorescent sheet 1. It can also be used as the marking part 3.
Moreover, when not printing directly, what printed the label | marker on PET film (polyethylene terephthalate) which is a transparent protective film is affixed on the other side of the phosphorescent sheet 1, and it is good also as an aspect used as the label | marker part 3.

Further, glass beads may be mixed in the phosphorescent sheet 1.
By adding glass beads, the light transmittance in the phosphorescent sheet 1 is further improved, and good visibility of the sign is ensured.

And as a transparent thermosetting resin material to be used, a urethane-type resin, a polyester-type resin, a silicone resin, an acrylic resin, etc. are selected suitably, and a thermosetting transparent polyurethane is especially preferable.
Further, the average particle diameter of the phosphorescent pigment is preferably 50 to 250 μm, and particularly preferably has a high luminance specification of 100 μm or more.
Hereinafter, a method for producing the phosphorescent evacuation guidance sign will be specifically described.

(Process 1)
A mixture obtained by mixing and stirring 100 parts of a non-yellowing polyurethane prepolymer which is a thermosetting resin, 10 parts of an amine-based curing agent, and 20 parts of a phosphorescent pigment (average diameter 30 μm) is charged into a centrifugal molding machine. Then, centrifugal molding is performed for 20 minutes under the conditions of a temperature of 110 ° C. and a rotational speed of 1000 rpm.
The mold of this centrifugal molding machine has a groove formed on the outer peripheral surface thereof.
Thereby, before the non-yellowing polyurethane prepolymer is cured, most of the phosphorescent pigment having a specific gravity larger than that of the non-yellowing polyurethane prepolymer moves into the groove portion.
In such a state, the non-yellowing polyurethane prepolymer is cured, and the phosphorescent sheet 1 is taken out from the mold of the centrifugal molding machine.

Here, as the phosphorescent pigment, for example, strontium oxide, aluminum oxide, rare earth oxide and the like can be suitably applied.
Moreover, the rotation speed of a centrifugal molding machine is 600-1500 rpm, Preferably it is 800-1200 rpm.
The mold temperature is preferably in the range of 60 to 150 ° C.

(Process 2)
After taking out from the shaping | molding die of a centrifugal molding machine at the process 1, the sheet-like luminous sheet | seat 1 is obtained by performing heat processing at the temperature of 100 degreeC for 12 hours.

As described above, by performing centrifugal molding under the conditions shown in Step 1, the phosphorescent sheet 1 having a valley portion 14 in which most of the kneaded phosphorescent pigment 13 is formed, which is formed by the groove portion of the centrifugal mold, is completed. .

Moreover, you may affix the PET film which gave the design to the surface on the opposite side to the trough part 14 of the phosphorescent sheet 1 with an adhesive agent etc. as needed.

(Process 3)
As shown in FIG. 2, the phosphorescent sheet 1 completed in the step 2 is attached to one side of the instrument 4 incorporating the light source unit 2 using a fluorescent lamp, thereby completing the phosphorescent evacuation guidance sign.

The above-mentioned invention can be used as a guide sign for a factory or a large store as well as used for an indoor guide sign board, a safety sign board or a safety guidance display board in a subway or underground parking lot.

It is a front view which shows the phosphorescent evacuation guidance sign which concerns on the Example of this invention. It is AA sectional drawing book of FIG. It is a front view which shows the phosphorescent evacuation guidance sign which concerns on a prior art. It is BB sectional drawing of FIG. It is a front view which shows the phosphorescent evacuation guidance sign which concerns on another prior art. It is CC sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Phosphorescent sheet 2 Light source part 3 Labeling part 4 Appliance 13 Luminous pigment 14 Valley part 15 Mountain part

Claims (3)

A step in which a mixture obtained by mixing a phosphorescent pigment (13) with a transparent thermosetting resin is put into a centrifugal mold having grooves formed on the outer peripheral side, and is subjected to centrifugal molding while heating, and a phosphorescent sheet (1 ) On a side surface of the instrument (4) provided with the light source part (2). 2. The phosphorescent according to claim 1, wherein the amount of the phosphorescent pigment (13) kneaded into the transparent thermosetting resin is a maximum and the amount of the phosphorescent pigment (13) is within the groove. Of manufacturing evacuation guidance signs. 3. The method of manufacturing a luminous evacuation guidance sign according to claim 1, wherein the groove formed in the centrifugal mold has a shape that allows the sign to be recognized.

Images