JP3901722B1 - Method for manufacturing phosphorescent plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a phosphorescent plate that can be visually recognized at night or in a dark place, and in particular, a method for manufacturing a phosphorescent plate that can produce a thin and high-strength product without causing cracks or the like on a printed surface during the production. provide.
SOLUTION: An end portion of a metal plate W on which glass frit and a phosphorescent material are printed is supported horizontally by a plurality of fulcrums 2, and a stopper 3 for limiting the deflection of the metal plate W is provided at the center of the phosphorescent plate. It is provided on the back side of the phosphorescent plate in the vicinity of the part, fired in this state to melt the glass frit, then cooled to solidify the glass frit and shrink the metal plate W so that the printing surface side is horizontal. Or a phosphorescent plate having a slightly convex shape.
[Selection] Figure 2

Description

  The present invention relates to a method of manufacturing a phosphorescent plate that can be visually recognized even in a dark place, and in particular, relates to a method of manufacturing a thin phosphorescent plate having a shape in which a phosphorescent printing surface is bent horizontally or slightly convex.

  A display board using a phosphorescent material that is visible at night or in a dark place, such as a guide board for emergency evacuation, is known. Such a phosphorescent plate needs to withstand long-term use, and when it is embedded in the floor, it needs to be strong enough not to break even if it is stepped on. Furthermore, since the thickness of the P tile is 2 mm or 3 mm so that it can be embedded in a P tile that is often used on the floor of schools, offices, hospitals, shops, etc., the product thickness is 3 mm or less, preferably about 2 mm. A thin phosphorescent plate is required.

  Although not intended for a guide plate, Patent Document 1 includes a first glass layer made of a glass component, a functional layer made of a glass component and a phosphorescent material, and a second glass layer made of a glass component. Ceramics are listed.

JP 2004-359480 A

  The ceramics described in Patent Document 1 can be used, for example, as sidewalk tiles. However, since it is a ceramic, if it is formed in a thin plate shape, the strength may decrease.

  In order to produce a thin and durable phosphorescent plate, it is necessary to use a metal plate as a base material. However, since the metal base material is greatly expanded and contracted by heat, when the glass frit and the phosphorescent material are fixed to the surface of the metal base material, a large warp occurs, and in some cases, a crack occurs on the printing surface. This phenomenon becomes prominent when the thickness of the metal plate substrate is reduced to 2 mm or less, particularly about 1 mm. Since the phosphorescent material or glass frit printed on the metal substrate surface must be baked at a temperature of, for example, 800 ° C., the metal substrate expanded at the time of firing contracts upon cooling, and the printed surface containing the phosphorescent material is wound inside. Will be greatly warped. In some cases, cracks occur on the printed surface.

  There are other problems caused by warping. One is when embedding in the P tile, but even if the light storage plate that is greatly warped is fixed with an adhesive or the like, the gap is large, and the adhesion is insufficient and it will be peeled off. In addition, when the product is manufactured by fixing it to a metal case such as stainless steel, the gap is also large, so that the adhesion is insufficient and it comes off. Moreover, even if it tries to fix a phosphorescent plate and a metal case by welding, the layer of a phosphorescent material will peel by the high temperature at the time of welding.

  The present invention relates to a method of manufacturing a phosphorescent plate that can be visually recognized at night or in a dark place, and in particular, a method of manufacturing a thin phosphorescent plate that does not cause cracks or the like on a printed surface at the time of manufacturing, and has high strength and high wear resistance. The purpose is to provide.

  The method for producing a phosphorescent plate of the present invention is a method for producing a phosphorescent plate in which a printed layer containing a glass frit and a phosphorescent material is formed on the surface of a metal substrate, wherein the printed layer made of the glass frit and the phosphorescent material is formed. The edge of the back surface of the base material is supported by a fulcrum and held horizontally. In this state, the glass frit and the metal base material are heated to melt the glass frit, and at the same time, the metal base material is bent by heat. When the amount of bending of the sheet reaches a predetermined value, the sheet is cooled to obtain a phosphorescent plate having a shape in which the printing surface side is bent in a horizontal or slightly convex shape due to the difference in shrinkage between the metal substrate and the glass frit accompanying the cooling. .

  As a problem in the above method, when the firing temperature is set to a temperature at which the deflection amount of the metal substrate becomes a predetermined value, if the firing temperature is too low, the glass frit cannot be sufficiently melted and cannot function as a product. Become. In order to solve such problems, a phosphorescent plate is provided with a stopper that limits the amount of bending of the metal substrate during heating after setting the firing temperature to, for example, about 800 ° C., which is a temperature at which the glass frit is sufficiently melted. It is desirable to appropriately control the amount of bending by providing it on the back side of the phosphorescent plate near the center.

  Further, in the method for producing a phosphorescent plate of the present invention, a white pigment or the like is printed on the surface of a metal substrate, and then dried and cooled. A glass frit and a phosphorescent material are printed thereon, and the glass is dried and cooled. The frit is printed, dried and cooled, and then the first baking is performed to produce a semi-finished product on which the phosphorescent material is printed. In making the phosphorescent plate by performing the second firing, at least one of the first firing and the second firing is performed by the above method. With respect to the above manufacturing method, it is possible to perform baking including pictographs in one baking without performing baking in two.

If a process of printing glass frit and drying and cooling is added following the printing and drying and cooling of the pigment, a phosphorescent plate with higher strength can be obtained.
In addition, in order to manufacture a phosphorescent plate fixed to a metal case, a plurality of metal pieces for caulking are projected from the back side surface of the metal plate constituting the phosphorescent plate completed by the second firing. On the other hand, by separately preparing a metal case provided with a plurality of cutout portions corresponding to the position of these metal pieces, by inserting each metal piece of the phosphorescent plate into each cutout portion of the metal case, Fix the phosphorescent plate to the metal case.

  According to the method for producing a phosphorescent plate of the present invention, the degree of flexure during firing can be adjusted as appropriate, so that a phosphorescent plate having a horizontal or slightly convex shape is obtained. If it is a phosphorescent plate of this shape, after baking, the crack of the printing surface by metal plate shrinkage | contraction at the time of cooling will not generate | occur | produce, but a high-strength printing surface can be maintained.

  In particular, in the case of a type of phosphorescent plate embedded in the floor or the like, the weight of the human body acts, so that the durability of the phosphorescent plate is slightly improved by using a phosphorescent plate having a slightly convex shape.

  Moreover, if the metal piece protrudes from the rear surface of the phosphorescent plate and is inserted into a cutout portion provided in the metal case to be caulked, the phosphorescent plate can be firmly fixed to the metal case.

  Hereinafter, embodiments of the present invention will be described in detail. The phosphorescent plate of the present invention uses a metal plate as a base material. There is no restriction | limiting in particular as a material of a metal plate, Although it can select suitably as needed, Stainless steel is preferable from the point which can endure corrosion.

  In manufacturing the phosphorescent plate, first, a printing material composed of a white pigment and medium is printed on the upper surface of the metal substrate. And it cools after drying at 150-200 degreeC.

  The white pigment is a base material for making the phosphorescence clearer, and a pigment of another color such as yellow may be used. As the next step, a printing material composed of a glass frit material and a medium is printed, and dried at 150 to 200 ° C. and then cooled. This step is not essential, but has the advantage of increasing the strength of the phosphorescent plate.

  Next, a printing material composed of a glass frit material, a medium, and a phosphorescent material is printed thereon, dried at about 150 to 200 ° C. after cooling, and then cooled, and a printing material composed of a glass frit material and a medium is printed thereon. And cooling after drying at 150-200 ° C.

  Subsequently, the first firing is performed. The baking temperature is about 800 ° C., and the glass frit is heated slowly until it is completely melted. In this way, a semi-finished phosphorescent plate is completed. This semi-finished product is a phosphorescent plate without a pattern and can be stored.

  To make a finished product, pictograms such as evacuation arrows are printed on the printing surface of the semi-finished product, dried at 150 to 200 ° C., and then cooled. Then, it is fired at a temperature of about 800 ° C. as in the first firing temperature to obtain a finished product.

  The finished product has a shape in which the printing surface side is horizontal or slightly convex. By manufacturing in this shape, the strength is increased, and it will not be damaged even if there is a load on the printing surface side, for example, a step by a person or the like. Moreover, the attachment to the metal case mentioned later is also easy.

In order to form the phosphorescent plate in the above-described horizontal or slightly convex shape, it is necessary to produce the phosphorescent plate by the method of the present invention. The method of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an example of a firing jig used for manufacturing the phosphorescent plate of the present invention, FIG. 2 is a plan view of the jig, and FIG. 3 is a cross-sectional view taken along line AA in FIG. FIG. 3 shows a state where the phosphorescent plate is placed.

  The jig 1 is for holding the phosphorescent plate when firing, and can be used at the time of the first or second firing, but is used for both the first and second times. This is desirable for preventing cracks on the printed surface and maintaining strength.

  The jig 1 is provided with fulcrums 2 as a plurality of support members for holding the phosphorescent plate horizontally. In the example of this figure, the fulcrum 2 is provided on each of the four sides on four sides and on each of the ten sides on each side. Therefore, it is possible to place two sheets at each stage with two-point support for a small metal plate w, and one sheet with eight-point support for a large metal plate W. In addition, since there are 10 stages, a maximum of 20 sheets can be simultaneously fired with a small metal plate w.

  Moreover, the iron plate 4 which attached the stopper 3 for restrict | limiting the bending degree of the metal plate W is also installed. The iron plate 4 with the stopper 3 may be installed in the jig 1 in a number corresponding to the number of processed metal plates W, and only one piece is shown in the drawing.

  In the case of performing the firing, a printing material P made of glass frit and medium is printed on the surface of the metal plate W, and a printed layer P is sprinkled with a phosphorescent material. A metal plate W is placed on 2 and placed in a firing kiln and fired at about 800 ° C. to melt the glass frit.

  Although the metal plate W bends downward by heating as shown in FIG. 4A, the metal plate W is maintained in a state of being bent to some extent because the stopper 3 is near the lower center of the metal plate W. As shown in FIG. 4B, the degree of this bending is a shape in which when the metal plate W and the glass frit are cooled, the metal plate portion contracts and the printing surface side is bent horizontally or slightly convexly. It is important that the height of the stopper 3 is appropriately adjusted by calculation or by repeating the experiment.

  The phosphorescent plate produced by the above method can be used as it is by sticking it to the floor or wall surface, but it can also be a product fixed to a metal case. FIG. 3 is a view showing a means for fixing the phosphorescent plate to the metal case according to the present invention. FIG. 4 is a plan view showing an example of a metal case fixed phosphorescent plate manufactured by the manufacturing method of the present invention.

  FIG. 5 is a perspective view showing an embodiment in which a phosphorescent plate is attached to a plastic tile. The thickness of the plastic tile 10 is usually about 2 mm, and the phosphorescent plate according to the present invention can also have a thickness of about 2 mm. .

  Therefore, a part of the plastic tile 10 is cut out to make a hole 11, and a phosphorescent plate is attached to the hole 11 with an adhesive or the like. According to this embodiment, it is possible to fix the guide plate and the like without performing a large-scale construction on the floor surface of the existing building.

  FIG. 6 shows another embodiment, and the processing shown in FIGS. 6A and 6B is performed on the phosphorescent plate completed by the second firing. That is, a plurality of metal pieces 5 for caulking are welded to the back side surface of the metal plate W constituting the phosphorescent plate. On the other hand, as shown in FIGS. 7A and 7B, the phosphorescent plate fixing surface 7 of the metal case 6 made of stainless steel or the like corresponds to the position of the small metal piece 5 protruding from the phosphorescent plate. In addition, a plurality of cutout portions 8 are provided. Then, the phosphor plate is firmly fixed to the metal case 6 by inserting the metal pieces 5 of the phosphor plate into the notches 8 of the metal case 6 and caulking.

  The phosphorescent plate fixed to the metal case 6 manufactured in this way has a form shown in FIGS. This product is a thin phosphorescent evacuation guidance sign with a total thickness of only 3.5 mm. The phosphorescent plate is firmly fixed to the metal case 6 so that it can be installed on the wall or floor so that it can be screwed or anchored. Two holes 9 for bolts are opened.

  According to the method for producing a phosphorescent plate of the present invention, a thin and high-strength phosphorescent plate can be produced. Therefore, this phosphorescent plate is widely used in nighttime and dark places as well as the evacuation guide signs described above. It can also be suitably used as a work instruction board, or as a decoration material inside restaurants such as restaurants and coffee shops.

The perspective view which shows an example of the jig | tool for baking used for manufacture of the phosphorescent board which concerns on this invention Top view of the jig AA line sectional view of FIG. (A) The figure which shows the phosphorescent plate in the bent state, (b) The figure which shows the phosphorescent plate after shrinkage | contraction The perspective view which shows the Example which affixes a phosphorescent board to a plastic tile (A) is a figure which shows the back side surface of the phosphorescent plate which concerns on another Example, (b) is sectional drawing of the phosphorescent plate which concerns on another Example (A) is a plan view of a case for attaching a phosphorescent plate, (b) is a sectional view of the case (A) is a plan view of a state where a phosphorescent plate is attached to the case, (b) is a cross-sectional view of a state where the phosphorescent plate is attached to the case

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Jig, 2 ... Supporting point, 3 ... Stopper, 4 ... Iron plate, 5 ... Metal piece, 6 ... Metal case, 7 ... Phosphorescent plate fixing surface, 8 ... Notch part, 9 ... Hole, 10 ... Plastic tile, 11 ... hole, W ... metal plate, P ... printing layer.

Claims (4)

A method of manufacturing a phosphorescent plate in which a glass frit and a phosphorescent material are overprinted and fired on the surface of a metal plate, and the end portions of the metal plate on which the glass frit and phosphorescent material are printed are supported by a plurality of support members and heated. Holding horizontally in the furnace, the glass frit, the phosphorescent material and the metal plate are heated in this state to melt the glass frit, and at the same time the metal plate is bent by heat, and the bending amount of the metal plate reaches a predetermined value. A method for producing a phosphorescent plate, comprising: cooling and obtaining a phosphorescent plate having a shape in which the printing surface side is bent horizontally or slightly convex depending on a difference in shrinkage between the metal plate and the glass frit accompanying the cooling. The method for manufacturing a phosphorescent plate according to claim 1, wherein a deflection amount of the metal plate is controlled by a stopper. After printing the pigment on the surface of the metal plate, drying and cooling, printing glass frit on it, drying and cooling, printing glass frit and phosphorescent material, drying and cooling, printing glass frit again, drying cooling After that, a semi-finished product on which the phosphorescent material is printed is manufactured by performing the first firing, and pictograms are printed on the upper surface of the semi-finished product, and after drying and cooling, the second firing is performed. Then, in manufacturing the phosphorescent plate, at least one of the first firing and the second firing is performed by the method according to claim 1 or 2, and the method for producing the phosphorescent plate. 4. The method of manufacturing a phosphorescent plate according to claim 3, wherein a plurality of metal pieces for caulking project from the back surface of the metal plate of the phosphorescent plate completed by the second firing, and the positions of these metal pieces A metal case provided with a plurality of cutout portions corresponding to the above is prepared, and the phosphorescent plate is fixed to the metal case by inserting each metal piece of the phosphorescent plate into each cutout portion of the metal case and caulking. A method for producing a phosphorescent plate, characterized in that: