JP2002264584A - Writing board member, manufacturing method therefor, and writing board device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing board device, with which homogeneous writing lines can be obtained, the lines, characters or the like written on which are seen easily and which can be employed for various uses. SOLUTION: The writing board device (1, 20) is made of a non-absorbable material and has a surface arithmetic mean roughness Ra of 1 or more and below 5 and further has a writing board member (4, 38) for a predetermined solid drawing material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing board member, a method for manufacturing the same, and a writing board apparatus. More specifically, a writing board member used in combination with a predetermined solid drawing material, a method for manufacturing the same, and a writing board apparatus. About.

[0002]

2. Description of the Related Art A writing board apparatus using a whiteboard is conventionally known. On the whiteboard, lines and characters can be written on with a whiteboard drawing material such as an oily marker, and the written lines and characters can be easily erased by wiping or the like.

The conventional whiteboard has a smooth surface to improve such erasability. As a result, light is reflected on the surface of the whiteboard, and lines and characters written on the whiteboard are difficult to see. There was a disadvantage of becoming.

In order to improve such disadvantages, a white board having an uneven surface is disclosed in, for example, Japanese Patent Application Laid-Open No. 10-1998.
No. 203084, No. 11-254885, No. 11-301173
And Japanese Patent Application Laid-Open No. 2000-280688.
These whiteboards have an opaque film or a white resin substrate and a coating layer disposed thereon, and the coating layer contains a particulate additive, or By embossing, irregularities are formed on the surface of the coating layer, thereby reducing light reflection on the surface of the whiteboard.

[0005]

However, when writing on a whiteboard, the drawing material for the whiteboard may slide on the surface of the whiteboard, and lines and characters may be blurred. In particular, if the drawing material for whiteboard becomes old or forgets to close the cap, the surface of the leading end of the drawing material for whiteboard dries, and it becomes easy to fade when writing lines, characters, and the like. For this reason, the conventional whiteboard has a drawback that a uniform writing line cannot be obtained.

In general, when irregularities are provided on the surface of a whiteboard, the larger the irregularities, the more difficult it is to reflect light, but the written whiteboard drawing material enters the concave portions, The erasability of the whiteboard drawing material deteriorates. Conversely, the smaller the unevenness, the easier it is to erase the written whiteboard drawing material, but the whiteboard drawing material written on the whiteboard surface reflects light and becomes difficult to see .
For this reason, the whiteboard described in the above publication has irregularities on its surface, but the irregularities on its surface are relatively small in order to surely erase written lines and characters. Has become. As a result, a sufficient anti-reflection effect cannot be obtained, and the problem of difficulty in seeing lines and characters due to light reflection has not yet been completely solved.

Further, when an opaque marker containing a white pigment or the like, that is, a liquid drawing material is used as a drawing material for a white board, the viscosity of the liquid drawing material becomes high, so that a ball or the like built in a writing tool before writing is used. Therefore, it is necessary to agitate the liquid drawing material, and furthermore, the liquid drawing material easily falls off. Therefore, it is necessary to provide a special structure for the writing implement to prevent dripping. For this reason, as a whiteboard drawing material such as an oil-based marker, a transparent material such as a fine particle pigment of 1 μm or less is often used. As described above, as a result of the use of the transparent material for the whiteboard drawing material, the concealing power of the whiteboard drawing material with respect to the whiteboard becomes weak. The board is
It is made of a white or opaque material, except for the decorative part that is not written. As a result, when lines and characters are written on a dark writing board or translucent or transparent writing board with a drawing material for whiteboard, the lines and characters become difficult to see, and such writing boards and lighting It has become difficult to cope with various uses such as combining.

Accordingly, an object of the present invention is to provide an easy-to-use writing board member and a writing board apparatus that can obtain a uniform writing line even if the drying is performed to some extent.

It is another object of the present invention to provide a writing board member and a writing board device which are easy to see.

Another object of the present invention is to provide a writing board device that can be used for various purposes.

Another object of the present invention is to provide a simple writing board member manufacturing method for manufacturing the above-described writing board member.

[0012]

In order to achieve the above object, a writing board member for a predetermined solid drawing material according to the present invention is made of a non-absorbent material and has a surface arithmetic roughness Ra of 1 or more and 5 or more.
Less than.

Since the writing board member thus constructed has a surface arithmetic roughness Ra of 1 or more and less than 5, a predetermined solid drawing material does not slip on the writing board member and obtains a uniform writing line. be able to. The surface arithmetic roughness Ra of the writing board member is 1
As described above, it is possible to prevent reflection of light on the surface of the writing board member, thereby making it easy to see lines, characters, and the like written on the writing board member. On the other hand, since the surface arithmetic roughness is set to less than 5, the solid drawing material written on the writing board member can be easily erased without being erased like a conventional whiteboard.

In order to achieve the above object, a writing board device according to the present invention is characterized by having the above-mentioned writing board member. The writing board device thus configured has the characteristics of the above-described writing board member.

[0015] The writing plate member can include a fluorescent substance. With this configuration, it is possible to enhance the visibility of the writing board, and even in a dimly lit place, the writing board member can be raised and the solid drawing material written on the writing board member can be seen.

Further, the writing board member is made of a translucent or transparent material, and it is possible to provide a back lighting section on the back side of the writing board member. Further, the back lighting section includes a light guide plate and a line light source. Can be included. With this configuration, the writing board device can obtain a higher luminance than when the writing board member contains a fluorescent substance, and enhances the visibility, and can be used in various applications in combination with lighting. It can be used.

Further, in order to achieve the above object, a method for manufacturing a writing plate member according to the present invention comprises the steps of providing irregularities on the surface of a roll; Transferring the irregularities to the surface, imprinting a filler on the surface of the thermoplastic material sheet on which the irregularities are transferred, and coating the surface of the thermoplastic material sheet on which the filler is imprinted. And According to such a configuration, the unevenness of the roll provided with the unevenness is uneven, and even if the unevenness of the thermoplastic material sheet to which the unevenness is transferred becomes uneven, the surface of the thermoplastic sheet is Since the unevenness can be made uniform by imprinting the filler, it is easy to adjust the surface roughness of the thermoplastic sheet, and as a result, a desired surface arithmetic roughness Ra can be obtained. If printing ink is used as the filler, it is possible to display a company name, a trademark, a ruled line, and the like on a writing board member. Furthermore, if a fluororesin is used as the material to be coated, the erasability of the solid drawing material on the writing board member can be improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of a writing board device according to the present invention will be described with reference to the drawings. FIG.
1 is a perspective view of a writing board device 1 according to a first embodiment. As shown in FIG. 1, the writing board device 1 includes a support plate 2,
A writing board member 4 bonded thereon.

The support plate 2 is rectangular when viewed from the front, and is used to prevent the writing plate member 4 from bending when writing lines or characters on the writing plate member 4. The support plate 2 is made of a material such as a metal, a resin, and wood with a conventionally known structure.

The writing plate member 4 has a back surface 6 bonded to the support plate 2 in a conventionally known manner, and a front surface 8 for writing lines, characters, and the like. The writing board member 4 is made of a non-absorbable material so that the written drawing material is not absorbed by the writing board member 4. Non-absorbing materials include plastic, metal, glass, enamel, porcelain, and the like. The thickness of the writing board member is, for example, 0.1 to 10 mm, and the arithmetic average roughness Ra (JIS B0601) of the front surface 8 is 1
It is preferably at least 5 and less than 5. In addition, the writing plate member 4 includes a flavin-rhodamine-pyranine-based fluorescent dye, a fluorescent substance such as a fluorescent pigment made from them, or a luminous pigment mainly containing Cu-ZnS. A luminous substance can be contained. However, when the writing plate member 4 is formed of plastic, it is not preferable to use a plastic containing a plasticizer, such as polyvinyl chloride. Because, after the lapse of time after writing,
This is because the solid drawing material written on the writing board member 4 cannot be wiped off.

Such a writing board member 4 can be formed by the following method. By way of example, a method of forming the writing board member 4 with a thermoplastic sheet 10 such as polypropylene will be described with reference to FIG. Schematically,
As shown in FIG. 2, the thermoplastic sheet 10 is passed through an embossing roll 12, and irregularities are formed on the surface 14 of the thermoplastic sheet 10 to form the writing board member 4.

First, how to make the embossing roll 12 will be described. The material of the embossing roll 12 is, for example, steel. On the surface of a roll (not shown) with no irregularities on the surface,
The unevenness is formed by an etching method or a blast method.
In the case of the etching method, a roll with no irregularities on the surface
Corrosion is caused by chemicals such as hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid, a ferric chloride solution, and an etching solution containing additives to form irregularities on the surface of the roll. In the case of the blast method, an abrasive having a sharp angle or a spherical shape is jetted by using compressed air or centrifugal force, and the jetted abrasive is caused to collide with a surface of the roll having no irregularities on the surface at a high speed. A fine pattern is engraved on the surface of the substrate by the impact action of the abrasive to form irregularities. The unevenness of the surface 18 of the embossing roll 12 thus formed is non-uniform.

Next, using a conventionally known technique, the thermoplastic sheet 10 is passed between the embossing roll 12 and the opposing roll 16 so that the unevenness of the surface 18 of the embossing roll 12 is formed on the surface 14 of the thermoplastic sheet 10. Transcribe. When the writing plate member 4 contains a fluorescent or luminous substance, the thermoplastic sheet 1
0 contains a fluorescent or luminous substance in advance. Since the unevenness of the surface 18 of the embossing roll 12 is uneven, the unevenness transferred to the thermoplastic sheet 10 is also uneven, and the surface roughness of the thermoplastic sheet 10 is relatively rough.

Next, a filler such as printing ink is imprinted on the surface 14 of the thermoplastic sheet 10 on which the irregularities have been transferred. As a result, the filler penetrates more into the deeper concave portions, and as a result, the unevenness of the surface 14 of the thermoplastic sheet 10 is made uniform. Next, the surface 14 of the thermoplastic sheet 10 with the filler imprinted thereon is coated with a fluororesin or the like. This allows
The filler is maintained so that the uniform unevenness does not collapse. By adjusting the amount of the imprinted filler while taking into account the thickness of the fluororesin or the like to be coated, the uniformity of the unevenness of the front surface 8 of the writing plate member 4 can be adjusted. Arithmetic roughness Ra can be obtained.

Finally, the fluoroplastic coated thermoplastic sheet 10 is cut to an arbitrary size to form the writing board member 4.

The solid drawing material used for the writing board member 4 is:
Patent application No. 2 filed on Jan. 4, 2001 by the applicant
It is preferably a solid drawing material described in JP-A-001-205. This solid drawing material contains alcohol-modified silicone and / or polyether-modified silicone as a first erasability imparting agent and at least one compound selected from the following group as a second erasability imparting agent. (A) monoester of aliphatic monobasic acid and monohydric alcohol; (b) diester of dibasic acid and monohydric alcohol; (c) mono or polyester of aliphatic monobasic acid and polyhydric alcohol (D) monoesters of aliphatic monobasic acids and polyalkylene glycols; and (e) polyoxyalkylene alkyl ethers.

This solid drawing material further contains a colorant, a gelling agent, a polymer compound capable of forming a film, and an organic solvent. The colorant is not particularly limited, and a known pigment or dye can be used as needed. The gelling agent is, for example, dibenzylidene sorbitol and its derivative or tribenzylidene sorbitol and its derivative. The polymer compound capable of forming a film increases the hardness of the solid drawing material, and can form a film with a painted surface, while an enamel plate, plastic,
Even if it is applied to a writing board member such as a white board, it can be easily and completely erased by gently wiping it with a dry cloth such as felt or soft paper. The organic solvent is capable of dissolving the gelling agent when heated, forming a gel when the temperature is returned to room temperature, and dissolving a polymer compound capable of forming a film.

Although such a solid drawing material can be written on a conventional whiteboard, since it is solid, the solid drawing material is formed by a convex portion of the front surface 8 of the writing plate member 4. And the drawing material does not flow into and adhere to the deep portion of the concave portion unlike the liquid drawing material. For this reason, even if the unevenness of the front surface 8 of the writing board member 4 becomes larger than that of a conventional whiteboard, the written solid drawing material can be erased by wiping or the like.

According to the writing board apparatus 1 configured as described above, the arithmetic mean roughness Ra of the front surface 8 of the writing board member 4 is 1
Since it is less than 5, the solid drawing material does not slide on the writing board member 4, and a uniform writing line can be obtained. Further, even when the solid drawing material becomes old or forgets to close the cap, and the tip of the solid drawing material becomes slightly dry, the solid surface becomes uneven due to the unevenness of the front surface 8 of the writing board member 4. Since the dry part at the tip of the drawing material is destroyed, uniform writing can be performed from the beginning of writing. Further, a uniform writing line can be obtained even with a small writing pressure. On the other hand, the arithmetic average roughness Ra is 1
If it is smaller than that of the conventional whiteboard writing board, the antireflection effect of light is not sufficient, and the writing board member 4
Lines and characters written on the front surface 8 become difficult to see.
When the arithmetic average roughness Ra is 5 or more, the written solid drawing material enters the concave portion of the front surface 8 of the writing board member 4, and wipes lines and characters written with the solid drawing material. Even if it tries, a line, a character, etc. will remain on the front surface 8 of the writing board member 4.

When the writing board member 4 contains a fluorescent substance, the writing board apparatus 1 is moved from a bright place to a dark place, and then the writing board apparatus 1 is irradiated with black light. Flashes, whereas the written solid drawing material represents darkness. Therefore, even in a dark place, lines, characters, and the like written on the writing board member 4 can be seen. Similarly,
When the writing board member 4 contains a luminous substance, when the writing board apparatus 1 is moved from a bright place to a dark place,
While the writing board member 4 shines, the written solid drawing material is dark. Therefore, even in a dark place, lines, characters, and the like written on the writing board member 4 can be seen. As a result, in each case, a visual effect not available in the conventional whiteboard can be obtained.

Further, the writing board member 4 formed by the above method is used.
Is easy to adjust the unevenness of the front surface 8 of the writing board member 4. Specifically, the irregularities on the surface 14 of the thermoplastic sheet 10 to which the irregularities on the surface of the embossing roll 12 are transferred are not necessarily uniform, and there are partially deep concave portions. By imprinting or printing the filler on the surface of the thermoplastic material plastic sheet 10, the filler selectively fills deep recesses, and as a result, the unevenness can be made uniform. By changing the imprinting amount of the filler, it is possible to adjust the unevenness of the surface of the thermoplastic sheet 10 and to make the surface of the thermoplastic sheet 10 a desired surface arithmetic roughness. Also, when printing ink is used as the filler, it is possible to display the company name, trademark, ruled lines, etc. on the writing board member 4, so that the writing board member or schedule used for commercial purposes such as advertising can be used. It is also possible to manufacture a writing board member with limited use. In addition, these printed contents can be protected because they are coated. Further, when a fluororesin is used as a material for coating, the erasability of the solid drawing material on the writing board member can be improved.

Next, a second embodiment of the writing board device according to the present invention will be described with reference to the drawings. 3 and 4 are a front view and a plan sectional view, respectively, of the writing board device of the second embodiment. The writing board member and the solid drawing material described in the second embodiment are, except as described below in particular,
This is the same as the writing board member and the solid drawing material described in the first embodiment, and the description of the common parts will be omitted. The writing board device 20, as shown in FIG.
A support portion 22 and a writing portion 24 attached to the support portion 22
And

The support portion 22 is movable 4 on the floor 26.
It has one caster 28, two legs 30 attached to the casters 28, and a span 32 extending between the two legs 30.

As shown in FIG. 4, the writing unit 24 includes a hollow frame 34, a writing plate member 38 disposed on the front surface 36 of the frame 34, a back lighting unit 40 disposed in the frame 34, have.

The frame 34 is rectangular when viewed from the front, and has an opening 42 in the front 36 (see FIG. 3). The writing plate member 38 is attached to the opening 42. The writing plate member 38 is made of a colored or non-colored milky transparent material or translucent material such as polyethylene, polypropylene, polystyrene, polymethacrylate, polyethylene terephthalate, polyamide, and polyacetal. The writing plate member 38 has a front surface 44 for writing a solid drawing material and a back surface 46, and the front surface 44 is arranged on the front surface 36 side of the frame 34. The thickness of the writing plate member 38 is determined so that the writing plate member 38 does not bend when writing a solid drawing material, and is, for example, about 1 to 10 mm.

The back illuminator 40 is conventionally known, and includes a light guide plate 48 disposed opposite to and covering the back surface 46 of the writing plate member 38 and two light guide plates 48 disposed on both sides of the light guide plate 48. And two line light sources 50. The front surface 5 of the light guide plate 48 facing the back surface 46 of the writing plate member 38
Reference numeral 2 indicates that light emitted from the linear light source 50 and guided into the light guide plate 48 can be illuminated from the entire surface 52. The light guide plate 48 is, for example, a front surface 52 or a back surface 54 so that the entire illumination from the light guide plate 48 is uniform.
It is preferable that milky white print diffusion patterns having different sizes are provided.

Next, the operation of the writing board device 20 will be described.
When light is emitted from the line light source 50, the light from the line light source 50 is guided to the light guide plate 48, and illuminates the back surface 46 of the writing plate member 38 from the entire front surface 52 of the light guide plate 48. Writing board member 38
Is made of a transparent material, it transmits light, and as a result, when the writing board member 38 is viewed from the front surface 36 of the frame 34, the entire writing board member 38 looks bright.

According to the writing board device 20 configured as described above, the writing board device 20 can be used in a dark place. In the case of a writing board device like a conventional whiteboard,
Lines and characters cannot be seen in a dark place, and cannot be used in such a place. However,
In the writing board device 20 of the second embodiment, the writing board member 38
Is made of a colored or non-colored milky transparent material or translucent material, and a back lighting unit 40 is provided on the back surface 46 side of the writing plate member 38.
By illuminating the writing board member 38 from the back surface 46, lines and characters written on the front surface 44 of the writing board member 38 are darkened. As a result, the written lines and characters are written. Can be seen even in dark places.

Further, since the back lighting section 40 includes the light guide plate 48 and the line light source 50, the entire writing board member 38 can be uniformly illuminated, and lines or characters can be written on the writing board member 3.
Either writing toward the end 56 of the 8 or writing on the central portion 58 can make them evenly visible.

Although two embodiments of the writing board device according to the present invention have been described, the following modifications are also possible.

In the above-described embodiment, Patent Application No. 2001-205
However, the solid drawing material used for the writing plate members 4 and 38 is not limited thereto.

Further, in the first embodiment, the fluorescent or luminous substance is contained in the writing plate member 4, but it is not necessary to contain it.

In the first embodiment, the filler is imprinted and coated on the thermoplastic plastic sheet 10. However, the filler may not be imprinted or may not be coated.

The colors of the writing board members 4 and 38 may be arbitrarily and appropriately selected. Thus, unlike a conventional whiteboard which is white, a free color can be selected according to a demand of a consumer. Further, the writing plate members 4 and 38 may be dark colors such as dark green. As a result, the light reflectance is reduced, so that the reflection of light can be more effectively prevented, and the lines and characters written on the writing board members 4 and 38 can be more easily seen. Also, by adding a white pigment or the like to the solid drawing material, the solid drawing material is made opaque,
If a solid drawing material having an enhanced concealing power for the writing board members 4 and 38 is used, even if the writing is performed on the colored writing board member, the lines and characters can be easily read.

In the first embodiment, the writing plate member 4 is bonded to the support plate 2. For example, the thickness is about 0.1 m.
The writing board member 4 cut into various sizes such as A4 size by m may be used alone. This allows the writing board member to be used alone on a desk or the like. It is also possible to make a hole with a punch or the like, the writing board member 4 having the hole can be bound to a file or a system notebook, and a plurality of sheets may be bound to be used like a notebook. Furthermore,
If a magnet sheet is attached to the back surface of the writing board member 4, it can be easily attached to an office partition or the like.

The writing board device 20 of the second embodiment may be used alone, or may be used side by side with a projector such as an overhead projector. By doing so, the writing board device 2 can be provided without causing discomfort or annoyance by repeatedly turning on and off the lighting of the room.
Writing a line, a character, or the like at 0 can assist the explanation by the projector. Further, the writing board device 20 may be used as a screen of a projector such as an overhead projector. In this case, there is no need to separately prepare a screen for the projector. Of course, the writing board device 20 may be used in a bright place.

[0047]

EXAMPLE Four writing board members A, B, C, and D having different surface arithmetic roughnesses Ra were prepared, and each writing board member was formed using the solid drawing material described in the above embodiment with respect to lines and characters. When writing on a writing board member, whether lines and characters are not faded when writing, whether the written lines and characters are not difficult to see due to light reflection, whether written lines and characters can be easily erased by wiping Was tested. The surface arithmetic roughness Ra is calculated by
The measurement was performed using a surf test 710 manufactured by Mitutoyo. The surface arithmetic roughness Ra and color of the four writing board members are as follows: A: Ra = 1.90 μm, red, opaque; B: Ra = 3.10 μm, white, transparent; C: Ra = 3.538 µm, yellow, opaque; D: Ra = 0.312 µm, red, opaque.

With respect to the writing board members A, B, and C, writing was performed smoothly without blurring from the beginning of writing of the solid drawing material, and no light reflection was observed on the surface of the writing board member. Furthermore, the written lines and characters could be easily wiped off.

With respect to the writing board member D, light was reflected on the surface of the writing board member, and the written lines and characters were hard to see. The solid drawing material could be written smoothly without blurring from the beginning of writing, and the written lines and characters could be easily wiped off.

[0050]

As described above, the writing board member and the writing board apparatus according to the present invention can obtain a uniform writing line, and the written line and characters can be easily seen. Further, the writing board device according to the present invention can be used for various applications. Further, the method for manufacturing a writing board member according to the present invention is simple.

[Brief description of the drawings]

FIG. 1 is a perspective view of a writing board device according to a first embodiment.

FIG. 2 is a perspective view of a writing board member being processed by an embossing roll.

FIG. 3 is a front view of a writing board device according to a second embodiment.

FIG. 4 is a plan sectional view of a writing board device according to a second embodiment.

[Explanation of symbols]

 1,20 writing board device 4,38 writing board member 40 backlight unit 48 light guide plate 50 line light source

Claims (6)

[Claims] 1. Surface arithmetic roughness Ra made of non-absorbent material
Is not less than 1 and less than 5, a writing board member for a predetermined solid drawing material. 2. A writing board device comprising the writing board member according to claim 1. 3. The writing board device according to claim 2, wherein the writing board member contains a fluorescent or luminous substance. 4. The writing board apparatus according to claim 2, wherein the writing board member is made of a translucent or transparent material, and a back lighting unit is provided on a back side of the writing board member. 5. The writing board device according to claim 4, wherein the backlight unit includes a light guide plate and a line light source. 6. A step of providing irregularities on the surface of the roll,
The step of transferring irregularities to the surface of a single thermoplastic material sheet by a roll provided with irregularities, and the step of imprinting a filler on the surface of the thermoplastic material sheet having the irregularities transferred,
2. The method according to claim 1, further comprising: coating the surface of the thermoplastic material sheet with a filler imprinted thereon.