JP2001318593A - Braille plate and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a braille plate which is excellent in an adhesion property between a metallic plate and braille-like ink layers and a method for manufacturing the same. SOLUTION: This braille plate 7 is formed by forming the braille-like ink layers 1 on the front surface of the metallic plate 2 and curing the same. The ink layers 1 consist of a photosetting resin and a phosphorus compound- containing acrylic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a braille plate and a method for manufacturing the same.

[0002]

2. Description of the Related Art An operation panel of an elevator, a ticket vending machine or the like is provided with a display plate formed in Braille for a visually impaired person. Conventionally, when manufacturing a display plate with braille, a braille stamping process is performed on a thin metal plate with a press or punch, a method of punching a needle or the like with a hole in the metal plate, and a protruding braille pattern by etching. And the like.

[0003]

However, all of the above-mentioned conventional methods have complicated processing steps and require large equipment.

[0004] There is also a method of printing an ink layer on a metal plate in a Braille pattern. However, in this method, the adhesion between the ink layer and the metal layer is low, and it is difficult to print directly on the metal plate.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a braille plate having excellent adhesion between a metal plate and a braille ink layer, and a method of manufacturing the same.

[0006]

According to a first aspect of the present invention, there is provided a Braille plate formed by forming and curing a Braille ink layer on a surface of a metal plate, wherein the ink layer comprises a photocurable resin and a phosphor compound-containing resin. A braille plate comprising an acrylic resin.

[0007] Since the ink layer forming the Braille is made of a photocurable resin, it can be cured by irradiating light such as ultraviolet rays, and no heat treatment is required. Therefore, mass printing is possible and a braille plate can be formed at low cost.

[0008] The phosphorus compound-containing acrylic resin contained in the ink layer is a substance that enhances the adhesion of the ink layer to the metal plate. For this reason, the adhesion of the ink layer to the metal plate is enhanced, and the durability of Braille is also improved. Therefore, direct emboss printing can be performed on a metal plate. Further, Braille can be formed without impairing the appearance by direct printing on a metal plate. In addition, since an ink layer can be formed on an existing display plate, a braille plate can be manufactured by low-cost renovation work.

The acrylic resin containing a phosphorus compound is not particularly limited as long as it is made of a mixture of a phosphorus compound and an acrylic resin and has an effect of improving adhesion. The photocurable resin is, for example, an ultraviolet curable resin. As the ultraviolet curing resin, for example, there is a resin using a modified polyester acrylate or the like.

As the metal plate, there is a plate using stainless steel, aluminum, copper or a copper alloy. The printing surface of the metal plate may be a mirror surface or a rough surface. In any case, strong adhesion to the ink layer can be ensured.
The metal plate may be an existing display panel, operation panel, or the like. Also in this case, the ink layer can be directly formed.

As in the second aspect of the present invention, the amount of the phosphorus compound-containing acrylic resin to be added is preferably 3 to 5 parts by weight based on 100 parts by weight of the photocurable resin. Three
If the amount is less than 5 parts by weight, the adhesion of the ink layer may be reduced. If the amount exceeds 5 parts by weight, the ink layer may not be cured.

According to a third aspect of the present invention, there is provided a step of screen-printing an ink material comprising a photocurable resin and a phosphorus compound-containing acrylic resin on a surface of a metal plate to form a Braille ink layer; Curing the layer by irradiating the layer with light.

In the present manufacturing method, since the ink layer is formed by printing and cured by light irradiation, heat treatment is not required, and mass production of braille plates can be performed at low cost.

According to a fourth aspect of the present invention, in the screen printing, a printing jig comprising a Braille forming board having a Braille forming hole opened in an ink layer forming portion, and a screen covering the Braille forming hole. It is preferable to carry out using. A screen on which a braille forming board having a predetermined thickness is superimposed is used as a printing jig. As a result, a predetermined height is secured in the printing hole. Therefore, the Braille ink layer can be formed at a predetermined uniform height. It is preferable that the total thickness of the Braille forming board and the screen is substantially equal to the height of the ink layer. Thereby, an ink layer having a uniform predetermined thickness can be formed.

It is preferable that the viscosity of the ink material constituting the ink layer is adjusted by adding a viscosity adjusting agent, a waist-cutting agent, and the like so that the ink layer can be thickened. Since the viscosity of the ink material changes depending on the temperature, the mixing ratio is appropriately adjusted accordingly. The ink material may be mixed with a pigment or the like. Thus, a desired color can be applied to the braille, and color braille can be formed according to the design of the construction location. In addition, when coloring the ink layer, it is preferable to make the light irradiation time longer than in the case of no addition. The Braille plate of the present invention can be used, for example, as a display plate with Braille for an elevator, a ticket vending machine, and the like.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 A braille plate according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the Braille plate 7 of this embodiment is formed by forming a Braille ink layer 1 on the surface of a metal plate 2 and curing the ink layer. The ink layer 1 is made of a photocurable resin and a phosphorus compound-containing acrylic resin. The height of the ink layer 1 is 250 to 400 μm, and the diameter of the ink layer 1 is 1.
4 to 2.0 mm.

Next, a method of manufacturing a braille plate will be described. A mirror-finished stainless steel plate is prepared as a metal plate. Also, an ink material for printing is prepared. The ink material is a modified polyester acrylate as a photocurable resin,
It comprises a phosphorus compound-containing acrylic resin, a monofunctional monomer, a polyfunctional monomer, and a sensitizer. The weight ratio of the modified polyester acrylate to the phosphorus compound-containing acrylic resin is 100: 5. The phosphorus compound-containing acrylic resin is mixed with the ink material immediately before printing. The sensitizer is 2
-Hydroxy-2-methyl 1-phenylpropane-1-
Is on. Further, an antifoaming agent, a leveling agent, a thixotropic agent, a viscosity adjuster, a lancing agent, and the like are added to the ink material.

As shown in FIG. 2A, a printing jig 3 for screen printing is prepared. The printing jig 3 includes a Braille forming board 5 having a Braille forming hole 51 opened in an ink layer forming portion, and a screen 4 having a mesh No. 80. The screen 4 covers the entire Braille forming board 5 including the Braille forming holes 51.

The Braille forming board 5 is formed by attaching a sheet of a photosensitive emulsion having a thickness of 300 to 350 μm to the surface of the screen 4, irradiating it with light, and developing, thereby forming a Braille forming hole at a portion corresponding to the Braille forming position. 51 are formed. The thickness of the screen 4 and the braille forming board 5 after the emulsion is cured is 100 μm and 260 to 320 μm, respectively, and the total thickness thereof is 360 to 420 μm. Next, the printing jig 3 is arranged on the surface of the metal plate 2.

Next, as shown in FIGS. 2 (b) and 2 (c), an ink material is screen-printed in a Braille pattern on the surface of the metal plate 2 to form an ink layer 1. The screen printing method will be described. First, as shown in FIG. 2B, the ink material 10 is placed on the screen 4, and the squeegee 6 spreads the ink material 10 over the entire surface of the screen 4. As a result, the ink material 10 enters the Braille forming hole 51. Next, as shown in FIG. 2C, the ink material 10 on the screen 4 is pressed by the squeegee 6 while the printing jig 3 is pressed against the surface of the metal plate 2. As a result, the ink material 10 inside the Braille forming hole 51 is
Is transferred to the surface of Next, the ink layer 1 is irradiated with ultraviolet rays for 5 seconds to be cured. Thus, the braille plate 7 is obtained.

When the ink layer of the obtained braille plate was scratched with a nail, the ink layer did not peel off. For comparison, a braille plate similar to that of Embodiment 1 was prepared except that the phosphorus compound-containing acrylic resin was not added, and the ink layer was peeled off when the ink layer was scratched with a nail.

EXPERIMENTAL EXAMPLE 1 In this example, a grid test of the adhesion of the ink layer was performed. The test method is a method in which the ink layer is cut in a grid pattern at a pitch of 1 mm, the cellophane tape (registered trademark) is pressed on this, and then the cellophane tape is peeled off. As a result of the adhesion test, no peeling occurred in the ink layer of Embodiment 1 when the cellophane tape was peeled off.

[0023]

According to the present invention, it is possible to provide a braille plate excellent in adhesion between a metal plate and a braille ink layer, and a method for manufacturing the same.

[Brief description of the drawings]

FIG. 1 is a sectional view of a braille plate according to a first embodiment.

FIGS. 2A to 2C are diagrams illustrating a method for manufacturing a braille plate according to the first embodiment.

[Explanation of symbols]

 1. . . Ink layer, 10. . . 1. ink material, . . 2. metal plate; . . Printing jig, 4. . . Screen, 5. . . 5. Braille forming board, . . Squeegee, 51. . . 6. Braille forming holes, . . Braille boards,

Claims (4)

[Claims] 1. A Braille plate formed by forming and curing a Braille ink layer on a surface of a metal plate, wherein the ink layer is made of a photo-curable resin and a phosphorus compound-containing acrylic resin. Braille board to feature. 2. The photo-curable resin according to claim 1,
A braille plate characterized in that the addition amount of the phosphorus compound-containing acrylic resin is 3 to 5 parts by weight based on 00 parts by weight. 3. A step of screen-printing an ink material comprising a photocurable resin and a phosphorus compound-containing acrylic resin on a surface of a metal plate to form a Braille ink layer, and irradiating the ink layer with light. And a step of curing the plate. 4. The screen printing according to claim 3, wherein the screen printing is performed by using a printing jig including a Braille forming board having a Braille forming hole opened in an ink layer forming portion, and a screen covering the Braille forming hole. A method for manufacturing a Braille plate.