JP2001290221A - Plate glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide new plate glass on which a user performs writing with a projected image as a background by further improving conventional plate glass where writing and erasing can be performed by using writing materials and contriving surface work so that the glass plate functions both as a writing member and a screen for projection. SOLUTION: The rough surface of a sheet of translucent plate glass having the rough surface formed on one side is prepared so that smooth round projecting parts obtained by taking away by etching the top of a nearly triangular projecting part which is formed by mechanical cutting by sand blast are continuing, and an image is formed on the rough surface in the case of projecting an image toward either side of the plate glass. The projecting part of the rough surface has such smoothness that water-soluble ink is easily erased when it is applied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in classrooms, offices, conference rooms, etc., and can be used repeatedly for writing with a general-purpose writing instrument and wiping and erasing with a character eraser such as a sponge. The present invention relates to a sheet glass functioning as a screen.

[0002]

2. Description of the Related Art Conventionally, this kind of repetitive writing section village is indispensable especially for learning by a large number of people, business affairs, meetings, advertisements, messages, notices and the like. Many types have been developed depending on the application,
Blackboards that use chalk for writing instruments, white boards that use general-purpose writing instruments such as felt-tip pens, etc. are well-known,
In any case, although the functionality of being able to be used repeatedly is satisfied, the decorativeness and design required in recent years are extremely poor, and in contrast, a rough surface is formed on the surface of the sheet glass. There has been developed a new sense of sheet glass that can be written and erased using a water-soluble writing instrument such as a felt pen.

[0003]

Accordingly, the present invention further improves the conventional sheet glass which can be written and erased by using a writing instrument, and devises the surface processing so as to function as a projection screen together with a writing member. It is an attempt to provide a new flat glass that allows a user to write on a projected image as a background.

However, if this type of conventional glass sheet is simply made to function as a projection screen, the conventional glass sheet simply obtains a click feeling on the rough surface of the glass sheet as shown in FIG. In addition, there is a problem that light is diffused so strongly on a rough surface that a sufficient image that can withstand visual observation cannot be obtained.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and has provided a novel sheet glass having the following features.

That is, in the plate glass of the present invention, in a translucent plate glass having a rough surface formed on one surface, the rough surface is formed by etching the top of a substantially triangular convex portion formed by mechanical cutting by sandblasting. Thus, the rough surface having the continuous smooth mountain-shaped projections missing was made continuous, and an image could be formed on the rough surface when an image was projected onto any surface of the sheet glass. More specifically, by devising the rough surface,
A click feeling of the writing instrument is obtained at the bottom, and the top is smoothed to have a structure that can be easily erased when a water-soluble ink is applied, and also facilitates image formation. Also,
By making the translucent plate glass a colored glass, the color appearance of the entire image was simultaneously improved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a projected state of the sheet glass of the present invention, FIG. 2 is a schematic cross-sectional view of the sheet glass of the present invention, and FIG. 3 is an enlarged sectional view of a main part of the sheet glass of the present invention. FIG. 4 is an enlarged sectional view of a main part of a conventional sheet glass.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention relates to a large-sized device which is separately attached to a wall surface portion of a room such as a classroom, an office, a conference room, or the like, or which is integrally assembled, or a leg member with casters or the like, and It is used in various embodiments, such as a medium-sized one that is movably installed on a table, a small-sized one that is mounted on a desk, a table, or the like, or that is integrally assembled and used.

According to the present invention, as shown in FIG. 1, writing with a general-purpose writing tool such as a felt-tip pen and wiping and erasing with a character eraser such as a sponge can be freely performed, and a personal computer as shown in FIG. A glass sheet 1 capable of forming an image A projected from a light source unit 2 such as a projector connected to the projector 1 or the like. The translucent plate glass 1 is made of colored glass, so that the color impression of the entire image can be further improved.

[0010] As shown in FIG.
Is, for example, a colored transparent or colorless transparent quartz glass having a thickness of an oblong rectangle or the like, an opaque glass ceramic, a crystallized glass, and the like, sand blasting, shot blasting, physical processing such as gliding, etching on one surface. A translucent plate glass 1 having a rough surface 1a formed by a chemical treatment such as melting, porosification, strengthening, or a combination thereof, or a light-scattering coating treatment by printing, vapor deposition, plating, painting, or the like. The rough surface 1a may be formed in a stripe, a pattern, or the like over the entire surface of the plate glass 1 or only a part thereof.
Since the shape of the sheet glass 1 can be freely changed, it is preferable to form the sheet glass 1 in various combinations in consideration of design.

According to the present invention, the rough surface 1a is a rough surface in which a smooth mountain-shaped convex portion is formed by cutting off a top portion x of a substantially triangular convex portion formed by mechanical cutting by sand blasting. In addition, when an image is projected toward the back surface or the front surface of the plate glass 1, it is possible to form an image that can withstand visual observation on a rough surface.

More specifically, the rough convex portion has a top portion x which is so smooth that it can be easily erased when the water-soluble ink is applied, but at the same time, as shown in FIG. It has a surface portion for emitting incident light in a state of being almost parallel. As a result, the projected image is slightly blurred in the outline, but rather produces a fantastic decorative effect by this phenomenon, and is formed with a sharpness enough to be visually recognized.

On the other hand, the bottom y of the rough surface 1a is formed as a slightly acute triangular groove, so that a click feeling can be obtained when the writing member is moved with the plate glass 1 in contact. The bottom portion y has a depth such that characters and designs written with a writing instrument such as a felt-tip pen can be easily erased with a character eraser such as a sponge or cloth. Synergistic effects such as easy-to-see and repetitive use and elimination of slippage when writing with a writing instrument are produced.

The glass sheet of the present invention configured as described above is
Not only a single sheet of single-layer glass, but also two sheets of glass 1 may be bonded to each other with an adhesive resin or the like to form a thick laminated glass, or the two sheets of glass 1 may be separated by an air layer. They may be bonded together to form a double-glazed glass.

An image may be projected from the background to the sheet glass 1 as shown in FIG. 2, or an image may be projected from the front, but in either case, as shown in FIG.
The image is formed on the rough surface 1a, that is, the writing surface. By writing characters and patterns on this surface, it can be used very effectively while giving a new atmosphere to presentations at meetings etc. Is possible.

The sheet glass according to the present invention was evaluated as follows.

[0017]

As described above, the flat glass of the present invention has a function as a screen capable of projecting an image as well as writing with a writing instrument as described above. Since writing work can be performed with an image as a background, it has become possible to provide a new sheet glass that is extremely practical. In addition, the transparency and color of the glass material, and the decorative synergistic effect of the light emitting part, make it excellent in decorativeness and design in addition to practicality. This is a very significant invention that can broaden the adaptation range to the living environment.

[Brief description of the drawings]

FIG. 1 is a front view of a projected state of a glass sheet of the present invention.

FIG. 2 is a schematic cross-sectional view of the sheet glass of the present invention.

FIG. 3 is an enlarged sectional view of a main part of the sheet glass of the present invention.

FIG. 4 is an enlarged sectional view of a main part of a conventional sheet glass.

[Explanation of symbols]

 A image 1 flat glass 1a rough surface x top y bottom 2 light source

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshimi Kaneda 2-27-11, Shiba, Minato-ku, Tokyo F-term (reference) 2H021 BA21 BA28 4G059 AA01 AA18 AB07 AB11 AC01 BB00

Claims (4)

[Claims] 1. A light-transmitting plate glass having a rough surface formed on one surface, wherein the rough surface has a substantially triangular convex portion formed by mechanical cutting by sand blast, and a top portion thereof is removed by etching. A flat glass having a rough surface in which a large mountain-shaped convex portion is continuous and capable of forming an image on the rough surface when an image is projected onto any surface of the flat glass. 2. The flat glass according to claim 1, wherein said translucent flat glass is colored glass. 3. The glass sheet according to claim 1, wherein the convex portion of the rough surface has a smoothness that can be easily erased when a water-soluble ink is applied. 4. The glass sheet according to claim 1, wherein the convex portion of the rough surface is formed to such an extent that a click feeling can be obtained when the glass sheet is moved while being in contact with the glass sheet.