JP2021088079A - Ultra-thin writing/notice board and construction method of ultra-thin writing/notice board - Google Patents

Abstract

To provide an ultra-thin writing/notice board that is ultra-thin, has a good appearance, is hard to drop, and is easy to dispose of chalk powder and the like for disposal.SOLUTION: An ultra-thin writing/notice board 1 according to the present invention includes a board main body 2 in which a surface material 3 is made of iron or the like and is coated, the back side is formed of a base material 4 such as wood, and a thin plate-shaped sheet material 5 made of a magnet material or the like is sandwiched between the surface side and the back surface side to form a three-layer structure, and these three layers are formed in a rectangular shape, frame materials 6, 7 that are attached to the outer circumference of the board main body and surround the upper, left and right sides of the outer circumference, a powder receiver 8 for placing chalk and an eraser placed thereon at the bottom of the board main body, and a powder receiving box 9 that is arranged at both corners of the powder receiver so that it can be opened and closed in the length direction, and stores chalk powder and eraser waste that collect in the powder receiver and are discharged to the outside of both corners. The thickness of the three-layered board main body is formed to be ultra-thin from 5 mm to 10 mm.SELECTED DRAWING: Figure 1

Description

The present invention is an ultra-thin writing system that is ultra-thin, lightweight, has a good appearance, has a structure that does not easily drop itself, and has a structure that makes it easy to dispose of chalk powder and the like for disposal. It relates to a bulletin board and an ultra-thin writing / bulletin board construction method that is an extremely simple construction method.

In the conventional general writing / bulletin board (blackboard or whiteboard), the heights of the top and bottom of the board body are the same with respect to the wall surface to be mounted, and the required number of L metal fittings with the board body arranged at equal intervals are used. It is configured to be attached.

In addition, regarding the conventional construction of a general writing / bulletin board on the wall surface, the board body assembled in advance at the factory or assembled on the spot is attached to the wall surface while being held by two or more workers. It is attached to the L metal fittings, and the L metal fittings and the board body are fixed with screws.

By the way, at the time of the Great East Japan Earthquake in March 2011, many of the installed board bodies fell from the wall surface.
Many of the walls on which the board was installed were dilapidated school buildings, but the same situation has occurred in relatively new school buildings.

That is, the fixing method using the L metal fittings includes the problem that the risk of falling cannot be denied in the event of a large earthquake or the like that will occur in the future.

In addition, it includes the problem that the danger of the board body falling cannot be denied not only in the event of an earthquake but also in normal times.

In this way, with regard to the writing / bulletin board that has been conventionally installed on the walls of school buildings, etc., it is difficult for it to fall from the walls, it is thin and has a good appearance, and chalk powder to be disposed of, etc. It was requested that the processing of the above be simple and easy.

In Patent Document 1, a magnet sheet is attached to the surface of a plywood substrate with an adhesive, and a blackboard surface material made of steel plate is attached to the surface of the magnet sheet by its magnetic attraction. Is disclosed as a blackboard having a structure in which a blackboard is surrounded by an aluminum edge frame and mounted on a wall surface using an L-shaped mounting bracket.

However, in the case of the blackboard of Patent Document 1, as shown in FIG. 3 and the like, the blackboard has a four-layer structure composed of an underframe, a substrate, a magnet sheet, and a blackboard surface material, and the blackboard body uses an L-shaped mounting bracket. The structure is mounted on the wall surface, and it also includes the problem that the danger of the blackboard body falling cannot be denied.

Japanese Unexamined Patent Publication No. 11-59068

The present invention has been developed in view of the above-mentioned conventional circumstances, and is ultra-thin, lightweight, has a good appearance, has a structure that does not easily fall, and is used for disposal of chalk powder, etc. The present invention provides an ultra-thin writing / posting board having a structure that is easy to process, and an ultra-thin writing / posting board that has an extremely simple construction method.

In the ultra-thin writing / bulletin board according to the present invention, the front surface material is made of iron or the like, is coated, and the back surface side is formed of a base material such as wood, and is between the front surface side and the back surface side. , A board body in which a thin plate-shaped sheet material made of a magnet material or the like is sandwiched between them to form a three-layer structure in which these three layers are formed in a rectangular shape, and the upper and left and right sides of the outer peripheral portion attached to the outer peripheral portion of the board body. A frame material that surrounds the three sides of the board, a powder receiver on which a chalk or eraser placed at the bottom of the board body is placed, and both corners of the powder receiver that can be opened and closed in the length direction and are detachably supported. It has a chalk powder that collects in the powder receiver and is discharged to the outside of both corners, and a powder receiving box that stores erasable waste, and the thickness of the three-layered board body is 5 mm or more and 10 mm or less. The most important feature is that it is formed in.

According to the invention of claim 1, it is ultra-thin, lightweight, has a good appearance, is hard to fall off, and has a structure that makes it easy to dispose of chalk powder and the like for disposal. It is possible to realize and provide a thin writing / bulletin board.

According to the invention of claim 2, the same effect as that of the invention of claim 1 is exhibited, and the frame material portion exposed on the front side of the board body has an ultra-thin width structure. It is possible to realize and provide an ultra-thin writing / bulletin board that has a good appearance and looks good in the interior of the room when viewed from the front, and can expand the writing area.

According to the invention of claim 3, the same effect as that of the invention of claim 1 or 2 is exhibited, and the powder receiver receives the chalk powder and the erasable scraps that fall from the board body surface on the upper surface side. And a pair of side caps provided with recesses having the same shape as the receiving surface portion of the powder receiving main body and attached to both end surfaces of the powder receiving main body without a step. Since it is configured so that the chalk powder and the erasing waste can be discharged outward from the receiving surface portion via each side cap, the chalk powder and the erasing waste falling on the powder receiver are discharged to the outside. It is possible to realize and provide an ultra-thin writing / bulletin board that can be performed smoothly and easily.

According to the invention of claim 4, the same effect as that of the invention of any one of claims 1 to 3 is exhibited, and the pair of powder receiving boxes are arranged at the lower ends of the powder receiving box. It is configured to be supported by a pair of powder receiving box storage bodies that can be opened and closed in the length direction and that is detachably supported, and that accommodates the chalk powder and erasable waste discharged to the outside of the powder receiving body. Therefore, it is possible to realize and provide an ultra-thin writing board that is extremely easy to dispose of the chalk powder and erasable waste.

According to the invention according to claim 5, in the invention according to any one of claims 1 to 4, the board body, the frame material, the powder receiver, the powder receiving box storage body and the powder receiving box are made of a non-combustible material. Alternatively, since it is formed of a flame-retardant material, it exhibits the same effect as the invention according to any one of claims 1 to 4, and also provides an ultra-thin writing / bulletin board with non-flammable specifications or flame-retardant specifications. Can be realized and provided.

According to the invention of claim 6, a step of attaching a frame material for surrounding the upper and left and right outer peripheral portions of the board body and a powder receiver to be attached to the lower part and a base material such as wood are attached to the installation target location. A step of sticking a sticking tool made of double-sided tape and an adhesive on the back side of the paper, and sticking this base material to the area where the frame material and the powder receiver are present, and a magnet material or the like on the surface of the pasted base material. These three layers are formed into a rectangular shape in a three-layer structure by a step of pasting a sheet material made of the above material and a step of attaching a surface material made of an iron material or the like which has been coated and made into a sheet to the surface of the sheet material. The board body has an ultra-thin thickness of 5 mm or more and 10 mm or less, and includes a step of attaching the powder receiving box to a pair of powder receiving box storage bodies provided at both ends of the powder receiving body. It is possible to realize and provide an ultra-thin writing / bulletin board construction method capable of extremely simply constructing an ultra-thin writing / bulletin board that exerts the above-mentioned effects.

According to the invention of claim 7, in the invention of claim 6, the board body, the frame material, the powder receiver, the powder receiving box storage body, and the powder receiving box are made of a non-combustible material or a flame-retardant material. Since it is formed, it is possible to realize and provide a method of constructing an ultra-thin writing / bulletin board having a nonflammable specification or a flame retardant specification while exhibiting the same effect as that of the invention according to claim 6.

FIG. 1 is a schematic front view of an ultra-thin writing / posting board according to an embodiment of the present invention. FIG. 2 is a schematic perspective view of an ultra-thin writing / posting board according to this embodiment. FIG. 3 is a schematic side view of an ultra-thin writing / bulletin board according to this embodiment. FIG. 4 is a schematic plan view of an ultra-thin writing / posting board according to this embodiment. FIG. 5 is a schematic bottom view of the ultra-thin writing / bulletin board according to the present embodiment. FIG. 6 is a schematic partial enlarged view of part A in FIG. FIG. 7 is a partially enlarged perspective view showing a closed state of the chalk powder receiving box in the ultra-thin writing / bulletin board according to the present embodiment. FIG. 8 is a partially enlarged perspective view showing an open state of the chalk powder receiving box in the ultra-thin writing / bulletin board according to the present embodiment. FIG. 9 is a schematic front view showing the arrangement state of the frame material and the powder receiver with respect to the installation target location in the construction method of the ultra-thin writing / bulletin board according to the present embodiment. FIG. 10 is a schematic perspective view showing a state in which the double-sided tape and the adhesive are attached to the back surface side of the base material in the method of constructing the ultra-thin writing / bulletin board according to the present embodiment. FIG. 11 is a partially omitted schematic front view showing a state in which the base material is attached to the installation target portion in the construction method of the ultra-thin writing / bulletin board according to the embodiment of the present invention. FIG. 12 is a schematic front view showing a state in which the magnet sheet is attached to the surface of the base material in the method of constructing the ultra-thin writing / bulletin board according to the present embodiment. FIG. 13 is a schematic front view showing a state in which the surface material is attached to the surface of the magnet sheet in the method of constructing the ultra-thin writing / bulletin board according to the present embodiment. FIG. 14 is an explanatory diagram showing a three-layer structure of a board body in the ultra-thin writing / bulletin board according to the present embodiment. FIG. 15 is a schematic front view showing a configuration example of a conventional general blackboard (whiteboard). FIG. 16 is a schematic partial enlarged view of part B of FIG. FIG. 17 shows a comparison of the thicknesses of the board body of the present embodiment and the board body of the conventional example, and a comparison of the protrusion dimensions from the wall surface of the installation target portion between the board body of the present embodiment and the board body of the conventional example. It is a comparative explanatory diagram which shows. FIG. 18 is a schematic partially enlarged perspective view showing a powder receiver and a side cap of a conventional example. FIG. 19 is a schematic plan view showing a chalk powder hole and a side cap provided in a conventional powder receiver. FIG. 20 is a schematic perspective view showing a chalk powder hole provided in a conventional powder receiver, a powder receiving box storage body, and a powder receiving box.

The present invention provides an ultra-thin writing / posting board that is ultra-thin, lightweight, has a good appearance, has a structure that does not easily fall, and is easy to dispose of chalk powder and the like for disposal. The purpose of realizing and providing is that the front surface material is made of iron material, etc., coated, and the back surface side is formed of a base material such as wood, and between each material of the front surface side and the back surface side, from a magnet material or the like. A board body having a three-layer structure with a thin plate-shaped sheet material sandwiched between them and forming these three layers in a rectangular shape, and a frame attached to the outer periphery of the board body and surrounding the upper part, left and right sides of the outer periphery. The material, the powder receiver on which the chalk or eraser placed at the bottom of the board body is placed, and the powder receiver is supported by both corners of the powder receiver so that it can be opened and closed in the length direction and is detachably supported, and collects in the powder receiver. It has a chalk powder that is discharged to the outside of both corners and a powder receiving box that stores erasable waste, and the thickness of the board body having the three-layer structure is formed to be ultra-thin from 5 mm to 10 mm. The portion of the frame material that is exposed on the front side of the board body is formed to have an ultra-thin width of 1 mm or more and 3 mm or less, and the joint portion of the end portion of the frame material that surrounds the upper part, left and right sides of the outer peripheral portion of the board body. Was realized by a configuration called tome processing, which was cut diagonally at 45 degrees.

Hereinafter, the ultra-thin writing / bulletin board according to the embodiment of the present invention and the construction method thereof will be described in detail with reference to the drawings.

In the ultra-thin writing / bulletin board (ultra-thin blackboard or ultra-thin whiteboard) 1 according to the present embodiment, as shown in FIGS. 1 to 6 and 14, the surface material 3 is made of iron or the like. It is coated and the back surface side is formed of a base material 4 such as wood, and a thin plate-shaped sheet material 5 made of a magnet material or the like is sandwiched between the front surface side and the back surface side to form a three-layer structure. A board body 2 in which these three layers are formed in a rectangular shape, frame members 6 and 7 mounted on the outer peripheral portion of the board main body 2 and surrounding the upper portion, left and right sides of the outer peripheral portion, and a lower portion of the board main body 2. A powder receiver 8 on which a chalk (or marker), which is a writing tool, and an eraser, which is a character erasing tool, are placed, and a powder receiver 8 which is openable and closable in the length direction at both lower corners of the powder receiver 8 and is removable. A pair of powder receiving boxes 9 for storing chalk powder, erasing dust, etc., which are collected in the powder receiving 8 supported by the powder receiver 8 and discharged to the outside of both corners, and a pair of powder receiving boxes 9 arranged at the lower ends of the powder receiving 8 It has a pair of powder receiving box storage bodies 10 that support the powder receiving box 9 so as to be openable and closable in the length direction of the powder receiving box 8 and to be detachably supported.

7 and 8 show the closed state and the open state of the powder receiving box 9 with respect to the powder receiving box storage body 10.

Then, the thickness of the board body 2 having the three-layer structure is formed to be an ultra-thin thickness of 5 mm or more and 10 mm or less, thereby improving the appearance of the board body 2.

Further, the portion of the frame members 6 and 7 exposed on the front side of the board body 2 is formed to have an ultra-thin width of 1 mm or more and 3 mm or less, which further improves the appearance and appearance and is viewed from the front. In some cases, the appearance of the board body 2 which is good for the interior of the room is improved, and the writing area (or the area for posting paper sheets) on the surface of the board body 2 is expanded.

As shown in FIG. 8, the powder receiver 8 has a powder receiver main body 11 having a receiving surface portion 12 for receiving chalk powder and erasing dust falling from the surface of the board main body 2 on the upper surface side, and both end surfaces of the powder receiving main body 11. On the other hand, it has a recessed portion 14 having the same shape as the receiving surface portion 12 of the powder receiving main body 11, and also has a pair of side caps 13 attached without a step.

Then, the chalk powder and the erasing waste are configured to be smoothly discharged from the receiving surface portion 12 to the outside of the powder receiving main body 11 via the side caps 13.

The discharged chalk powder and erasable waste fall into the powder receiving box 9 in the open state, and are disposed of as necessary.

Further, in the present embodiment, the board body 2, the frame materials 6, 7, the powder receiver 8, the powder receiving box storage body 10 and the powder receiving box 9 are formed of a non-combustible material or a flame-retardant material, thereby incombustible. It is possible to install the ultra-thin writing / bulletin board 1 according to this example in various buildings related to evacuation difficulty, such as schools, hospitals, high-rise buildings, etc., which have sex specifications or flame-retardant specifications and are stipulated by the Building Standards Act. There is.

According to the ultra-thin writing / bulletin board 1 according to the present embodiment, it is ultra-thin, lightweight, and has a good appearance, and is on the back surface side of the base material 4 constituting the board body 2 as described later. Since the double-sided tape 15 and the adhesive 16 are attached and attached to the wall surface, it is difficult to drop, and the composition of the powder receiver 8 and the powder receiver box 9 treats chalk powder and the like to be disposed of. It is also possible to provide an ultra-thin writing / posting board 1 that is easy to simplify.

Next, the construction method of the ultra-thin writing / bulletin board 1 according to the present embodiment will be described with reference to FIGS. 9 to 13.

First, as shown in FIG. 9, it is attached to the frame members 6, 7 and the lower part for surrounding the upper, left and right three outer peripheral portions of the board body 2 at the installation target location (for example, the wall surface of the school classroom). Attach the powder receiver 8 with screws or the like.

Next, as shown in FIG. 10, after attaching a sticking tool made of double-sided tape 15 and an adhesive 16 to the back surface side of a rectangular plate-shaped base material 4 made of wood or the like, as shown in FIG. The back surface side of the base material 4 is attached to the area where the frame materials 6 and 7 and the powder receiver 8 are present, and the front surface side of the base material 4 is exposed.

Next, as shown in FIG. 12, a thin plate-shaped sheet material 5 made of a magnet material or the like is attached to the surface of the attached base material 4.

Next, a surface material 3 made of an iron material or the like that has been coated and formed into a sheet is attached to the surface of the sheet material 5 by using the magnetic force of the sheet material 5, and these three layers are formed into a rectangular shape in a three-layer structure. The ultra-thin board body 2 having a thickness of 5 mm or more and 10 mm or less formed in the above is used.

Further, the powder receiving box 9 is attached to the pair of powder receiving box storage bodies 10 provided at both ends of the powder receiving box 8, and the ultra-thin writing / posting board 1 (completed product) according to the present embodiment shown in FIG. 13 is attached. To do.

FIG. 14 is an outline of a board body 2 having a three-layer structure composed of a surface material 3, a base material 4, and a sheet material 5 in the ultra-thin writing / posting board 1 according to the present embodiment and having a thickness of 5 mm or more and 10 mm or less. It shows the configuration.

The board body 2, the frame materials 6, 7, the powder receiver 8, the powder receiving box storage body 10, and the powder receiving box 9 are made of a non-combustible material or a flame-retardant material, and have non-flammable specifications or flame-retardant specifications. It is also possible to use the ultra-thin writing / bulletin board 1 of.

According to the construction method of the ultra-thin writing / bulletin board 1 according to the present embodiment, a construction method capable of constructing the ultra-thin writing / bulletin board 1 exhibiting the above-mentioned effects in an extremely simple process is provided. Can be provided.

Further, according to the construction method of the present embodiment, it is possible to make an ultra-thin writing / posting board 1 in which one wall of the installation target location is a writing surface or a posting surface such as a paper leaf.

Next, with reference to FIGS. 15 to 20, a comparison between the conventional general writing / posting board 21 and the ultra-thin writing / posting board 1 of this embodiment and the conventional writing / posting board 21 will be described. To do.

FIG. 15 shows a general writing / bulletin board 21 attached to a conventional school classroom or the like. In this writing / bulletin board 21, the front surface material 22 is made of iron or the like, is coated, and the back surface is coated. A board body 24 formed of a square lumber such as wood and having a three-layer structure in which a plate material 23 made of a veneer plate or the like is sandwiched between the front surface material 22 and the square material on the back surface side, and these three-layer structures are formed in a rectangular shape. And, the frame members 25 and 26 which are attached to the outer peripheral portion of the board body 24 and surround the upper part and the left and right sides of the outer peripheral portion and the frame members 25 and 26 arranged in the upper left corner and the upper right corner of the outer peripheral portion are connected. A corner cap 27 to be used, a powder receiver 28 for placing a chalk or eraser arranged at the lower part of the board body 24, a powder receiver box storage body 29 arranged below the central portion of the powder receiver 28, and a front pull-out type. It has a powder receiving box 30 and.

The board body 24 is configured to be attached to a wall surface of a school classroom or the like by using a required number of L metal fittings 31 having a wall thickness of, for example, 3 mm.

Here, to outline the construction method of the conventional writing / bulletin board 21, first, the L metal fitting 31 is attached to the wall surface of a school classroom or the like with screws.

At this time, if the size of the board body 24 is approximately 3600 mm in width × approximately 1200 mm in height, a total of 10 L metal fittings 31 are used at 5 locations above and below, and these are arranged at a pitch of 900 mm or less, and the board body 24 is arranged. To install.

The board body 24 is assembled in advance at the factory and transported by truck or the like, but a large board body or the like having a width of 7,000 mm is carried in in a divided state according to the carry-in entrance or the number of floors of the building to be installed. It is assembled locally.

When the board body 24 is supported by each L metal fitting 31, two or more workers are arranged so as to be placed on the lower L metal fitting 31 from the lower side, and then the upper L metal fitting 31 and the board body 24 is fixed with screws, and the lower L metal fitting 31 and the board body 24 are fixed with screws.

Then, by attaching the powder receiving box 30 to the powder receiving box storage body 29, the construction of the writing / posting board 21 is completed.

However, in the case of the conventional writing / bulletin board 21, even in an old school building or a new school building, if the screw attachment position to the wall of the L metal fitting 31 is not an appropriate beam or skeleton, it may occur in the future. In the event of an unknown huge earthquake, etc., the writing / posting board 21 itself includes the problem that the danger of falling cannot be denied.

FIG. 16 is an enlarged view of a schematic portion of portion B of FIG. 15, and is a portion of the frame members 25 and 26 surrounding the upper portion, left and right sides of the outer peripheral portion, and a portion of the corner cap 27 that is exposed on the front side of the board body 24. Is formed to be wider than the portion of the frame members 6 and 7 according to the embodiment of the present invention that is exposed on the front side of the board body 2 and has an ultra-thin width of 1 mm or more and 3 mm or less.

FIG. 17 shows a comparison of the thicknesses of the board body 2 of the present embodiment and the board body 24 of the conventional example, and from the wall surface of the wall of the installation target portion of the board body 2 of the present embodiment and the board body 24 of the conventional example. It shows the comparison of the protrusion dimensions.

For example, the thickness of the board body 2 and the protruding dimension from the wall surface according to the configuration of this embodiment are within 10 mm, whereas the thickness of the board body 24 in the conventional example is about 36.5 mm from the wall surface. The protruding dimension of the L metal fitting 31 to be attached to the wall is 3 mm, which is about 39.5 mm in total, but in the case of this embodiment, it is about 1/4 of the thickness of the board in the conventional example. As a result, according to the configuration of this embodiment, an ultra-thin and lightweight board can be realized.

FIG. 18 is a schematic partially enlarged perspective view showing the side cap 32 of the conventional example. In the conventional side cap 32, the end face portion 32a of the side cap 32 has a structure that closes the side of the powder receiver 28. , Chalk powder and the like are difficult to be discharged from the side of the powder receiver 28 to the outside, which is significantly different from the side cap 13 in the case of this embodiment.

FIG. 19 shows a choke powder hole 28a and a side cap 32 provided in the powder receiver 28 in the conventional example, and FIG. 20 shows a choke powder hole 28a and a central portion of the powder receiver 28 provided in the powder receiver 28 of the conventional example. The powder receiving box storage body 29 arranged on the lower side and the powder receiving box 30 of the front pull-out type are shown.

In the case of the conventional example, the chalk powder or the like is dropped into the powder receiving box 30 below the chalk powder hole 28a using an eraser or a dust cloth, and if necessary, the powder receiving box 30 is pulled out toward the choke. Dispose of powder, etc.

On the other hand, in the case of this embodiment, as described above, the chalk powder and the like collected in the powder receiver 8 in the powder receiver box 9 opened at both ends of the powder receiver 8 can be simplified and quickly. As a result, the chalk powder hole 28a in the conventional example is no longer required, and the disposal of chalk powder and the like can be facilitated, and the processing of the powder receiver 8 can be facilitated and the manufacturing cost can be reduced. It is possible to reduce the cost of the product.

The ultra-thin writing / bulletin board according to the present invention can be widely used by being installed on the wall surface of a classroom, a conference room, an office, or the like in the education industry or a general company.

1 Ultra-thin writing / bulletin board 2 Board body 3 Surface material 4 Base material 5 Sheet material 6, 7 Frame material 8 Powder receiver 9 Powder receiver box 10 Powder receiver box storage body 11 Powder receiver body 12 Receiving surface 13 Side cap 14 Recess Part 15 Double-sided tape 16 Adhesive 21 Writing / bulletin board 22 Surface material 23 Plate material 24 Board body 25, 26 Frame material 27 Corner cap 28 Powder receiver 28a Chalk powder hole 29 Powder receiver box storage body 30 Powder receiver box 31 L metal fittings 32 Side Cap 32a end face

Claims (7)

The front surface material is made of iron or the like, is coated, and the back surface side is formed of a base material such as wood, and a thin plate-shaped sheet material made of a magnet material or the like is formed between the front surface side and the back surface side. The board body, which has a three-layer structure sandwiched between them and has these three layers formed in a rectangular shape,
A frame material that is attached to the outer circumference of the board body and surrounds the upper part, left and right sides of the outer circumference,
A powder receiver on which a chalk or eraser placed at the bottom of the board body is placed,
A powder receiving box that is arranged at both corners of the powder receiver so as to be openable and closable in the length direction, and stores chalk powder and erasable waste that collects in the powder receiver and is discharged to the outside of both corners.
Have,
An ultra-thin writing / posting board characterized in that the thickness of the board body having a three-layer structure is formed to be an ultra-thin thickness of 5 mm or more and 10 mm or less. The portion of the frame material that is exposed on the front side of the board body is formed to have an ultra-thin width of 1 mm or more and 3 mm or less, and the end portion of the frame material that surrounds the upper part, the left and right sides of the outer peripheral portion of the board body. The ultra-thin writing / bulletin board according to claim 1, wherein the joint portion is formed by diagonally cutting at 45 degrees, which is called tome processing. The powder receiver has the same shape as the receiving surface portion of the powder receiving main body with respect to the powder receiving main body having a receiving surface portion for receiving chalk powder and erasing dust falling from the board main body surface on the upper surface side and both end surfaces of the powder receiving main body. It has a pair of side caps, which are provided with a recessed portion and are attached without a step.
The ultra-thin writing / posting board according to claim 1 or 2, wherein the chalk powder and erasable waste can be discharged outward from the receiving surface portion via each side cap. The pair of powder receiving boxes are supported by a pair of powder receiving box storage bodies arranged at the lower ends of the powder receiving box so as to be openable and closable in the length direction and are detachably supported on the outside of the powder receiving box. The ultra-thin writing / posting board according to any one of claims 1 to 3, wherein the chalk powder and erasable scraps to be discharged are contained. The method according to any one of claims 1 to 4, wherein the board body, the frame material, the powder receiver, the powder receiving box storage body, and the powder receiving box are formed of a non-combustible material or a flame-retardant material. Ultra-thin writing / bulletin board. The process of attaching the frame material for surrounding the upper part of the board body and the outer circumferences on the left and right sides, and the powder receiver attached to the lower part of the board body, and the process of attaching to the installation target location.
A process of attaching a sticking tool made of double-sided tape and an adhesive to the back surface side of a base material such as wood, and attaching this base material to the area where the frame material and the powder receiver are present.
The process of pasting a sheet material made of a magnet material or the like on the surface of the pasted base material, and
A process of attaching a surface material made of iron or the like, which has been coated to form a sheet, onto the surface of the sheet material.
In addition to forming an ultra-thin board body having a three-layer structure and having these three layers formed in a rectangular shape with a thickness of 5 mm or more and 10 mm or less.
The process of attaching the powder receiving box to the pair of powder receiving box storage bodies provided at both ends of the powder receiving body, and
A method of constructing an ultra-thin writing / bulletin board, which is characterized by including. The ultra-thin writing according to claim 6, wherein the board body, the frame material, the powder receiver, the powder receiving box storage body, and the powder receiving box are formed of a non-combustible material or a flame-retardant material.・ How to install the bulletin board.

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