JPH08300892A - Chalk eraser used for erasable writing board - Google Patents

Abstract

PURPOSE: To provide an erasing function for a markerboard and that for a chalkboard to a single chalk eraser. CONSTITUTION: A shape-keeping member 4 is provided to a holding member 2 so as to be inflatedly projected from inside. Two faces 7, 8 divided by a dividing line 1 extending longitudinally at a central position in a short side direction are formed on a surface of a shape-keeping member 4. An erasing surface material 9 for a markerboard is fixed by superposing to one side surface 7 so as to cover it, and an erasing surface material 12 for a chalkboard is respectively fixed to the other side surface 8 so as to cover that.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present application relates to a raffle used for a writing board for erasing characters etc. written on a marker board and a chalk board.

[0002]

2. Description of the Related Art Conventionally, a marker board for writing with a marker is one in which a liquid opaque marker liquid is applied to the surface of a enamel plate and dried so that characters and the like can be written on. When wiping off the applied and dried handwriting, Raffle having a wiping surface in which relatively thick, hard and long fibers are planted on a relatively hard base fabric surface, or a fiber having a felt-like wiping surface is used. On the other hand, a chalk board written with chalk is one in which broken chalk powder adheres to the surface of the board so that characters can be written on it, and the board surface has a file shape with a fine surface roughness due to the destruction of the chalk. Since it is only necessary to wipe off chalk powder, raffle is used which is relatively thin, soft, and has short fibers that are planted on a relatively soft base fabric surface. That is, as described above, the marker board raf and the chalk board raf are each composed of a wiping surface material that exhibits a wiping effect most suitable for the characters to be wiped.

[0003]

However, today, there are both marker boards and chalk boards of dark green color, and the length when the writing surface is visually inspected indicates whether it is a marker board or a chalk board. Since it is difficult to distinguish between them, it is troublesome to check which writing board is which one and prepare the necessary raffle, and to use it properly. It is often the case that I use a marker board and a chalk board at the same time to write sentences, mathematical formulas, figures, or tables at a debriefing session, etc. In this case as well, there are two cases for the marker board and the chalk board. Not only is it inconvenient to use, it is necessary to select and use different types of Rahul each time it is used, and it is also necessary to use the same place. Always there is an inconvenience such as that it is necessary to prepare two types of Rahul to.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present application, the wiping surface of a wiping cloth extends from one end to the other end opposite thereto in order to improve the above-mentioned disadvantages of the conventional one. It is composed of two surfaces divided by a dividing line, one surface of which is composed of a wiping surface material for a marker board and the other surface of which is composed of a wiping surface material for a chalk board. Specifically, it has a gripping member having a fitting concave portion at the center of the inner surface, a fitting portion fitted in the fitting concave portion, and a bulging portion bulging from the inner surface of the gripping member. Then, the shape-retaining member formed on one surface of the bulging portion to form the two surfaces divided by a parting line extending from the end portion to the other end portion opposite to the one end surface, and so as to cover the one surface. Cover the other surface with the wiping surface material for the marker board that has been superposed on the shape-retaining member. It is composed of a wiping surface material for a chalk board superposed on a shape-retaining member, and a wiping surface is formed by a wiping surface material for a marker board and a wiping surface material for a chalk board. Preferably, the two surfaces are formed so as to be inclined in the relative direction with the section line as a boundary. In the above, as a means for attaching the wiping surface material to the shape-retaining member, a groove portion is provided along the dividing line, and each of the wiping surface material for the marker board and the wiping surface material for the chalk board is provided in the groove portion. A case in which the ends are interveningly fixed and the other ends of the wiping surface material for the marker board and the wiping surface material for the chalk board are respectively fixed to the opposite side surfaces of the shape retaining member, and the shape retaining member. Is divided into two along the dividing line, one of the shape-retaining members is overlapped with a wiping surface material for a marker board so as to cover the surface, and the other shape-retaining member is covered with the surface thereof. In some cases, a wiping surface material for a chalk board is polymerized and the divided surfaces of the two divided shape-retaining members are joined to each other, and preferably both wiping surface materials face each other on one side of the shape-retaining member. The side surface overlaps with the other side surface and the opposite side surface exposes the end surface of the wiping surface material. . In addition, the wiping surface has a rectangular shape in a plan view, and the separating line is 2 in the lateral direction.
The dividing line, the dividing line extending in the longitudinal direction so as to divide the wiping surface in two, and the dividing line extending from one corner to the other opposite corner. There are cases. Further, as the above-mentioned wiping surface material for the marker board, one made of a knitted cloth or a woven cloth in which a large number of loop elements are erected on the base cloth surface is also used as a wiping surface material for a chalk board. What is made up of a large number of thin, soft short pieces planted on the cloth surface is used.

[0005]

In use, the marker board or the chalk board is rubbed against the writing surface of the marker board or the chalk board while pressing the surface of the raffle against them. Then, the characters on the marker are wiped off mainly by the wiping surface material for the marker board, and the characters on the chalk are wiped out mainly by the wiping surface material for the chalk board. Also, when the two surfaces consist of surfaces that are inclined in the relative direction with the dividing line as the boundary, when wiping off the characters etc. written on the marker board with the marker, while tilting in the relative direction with the dividing line as the boundary Surface, that is, the surface composed of the wiping surface material for the marker board, is rubbed while pressing it against the writing surface.Also, when wiping off the characters written on the chalk board with chalk, the dividing line is used as a boundary. Then, the other surface made of the wiping surface material for the chalk board which is inclined in the relative direction is rubbed while pressing the other surface against the writing surface to efficiently wipe the characters on the writing surface.

Further, in the case of Rahul in which the end surface of the wiping surface material is exposed on the other side surface opposite to the overlapping side surface of both wiping surface materials, after drawing a figure with a solid line and making it into a broken line figure,
If it is used for partial erasing, it is particularly easy to visually confirm and sharp erasing is performed, so that a beautiful partial erasing is realized without blurring the erased end of the line.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present application will be described in detail below with reference to the drawings. In FIGS. 1 and 2, the wiping surface of the wiping portion has a vertical rectangular shape in plan view, and the dividing line 1 is wiped in the lateral direction. FIG. 1 is a perspective view and a sectional view of a whole body of a first embodiment extending so as to divide an erasing surface into two parts. A grip member 2 is a synthetic resin frame having a vertical rectangular fitting recess 3 on its inner surface. This mating recess 3 consists of a body
The shape-retaining member 4 fitted in the fitting member has a fitting portion 5 fitted into the fitting recessed portion 3 and a bulging portion 6 bulging from the inner surface of the frame body. A partition line 1 extending in the longitudinal direction is provided at the center position in the lateral direction on the surface of, and the two faces 7 and 8 are integrally formed with the partition line 1 as a boundary and are made of a foam synthetic resin. As shown in FIG. 3, the marker board wiping surface material 9 that overlaps with the shape-retaining member 4 so as to cover the one surface 7 is provided with a large number of loop elements 11 on the base cloth 10. A wiping surface material 12 for a chalk board, which is made of a knitted cloth in which the upper part of the element 11 is bent and entangled, or a woven cloth, and which is superposed on the shape-retaining member 4 so as to cover the other surface 8, is
As shown in FIG. 4, relatively thin and short soft fibers are provided in a relatively soft base cloth 10 in a flocked shape, and a large number of concave grooves 13 extending in the longitudinal direction and arranged in the lateral direction are arranged.
In this way, the wiping surface material 9 for the marker board and the wiping surface material 12 for the chalk board form a wiping surface.

The wiping surface materials 9 and 12 superposed on the surface of the shape-retaining member 4 are arranged along the section line 1 as shown in FIG.
One end of each of the wiping surface material 9 for the marker board and the wiping surface material 12 for the chalk board is intervened in the groove portion 14 provided on the surface of the to secure the adhesive board with an adhesive, and The wiping face material 9 is superposed on one surface 7 and the wiping face material 12 for a chalk board is superposed on the other surface 8 in a tension state, and the other ends thereof are opposed to each other in the lateral direction. And the side surfaces of the shape-retaining member 4 facing each other in the lateral direction and the surface of the bulging portion 6 are covered by the wiping surface materials 9 and 12 in a tense state, and in the longitudinal direction. Both end surfaces of the wiping surface members 9 and 12 are exposed on the opposite side surfaces.

An adhesive may be used as a means for fitting the fitting portion 5 of the shape-retaining member 4 in which the wiping surface materials 9 and 12 are superposed on the surface in a tensioned state into the fitting concave portion 3. Then, the fitting portion 5 of the shape-retaining member 4 is press-fitted into the fitting concave portion 3.

That is, since the shape-retaining member 4 is made of foamed synthetic resin, the elasticity of the shape-retaining member 4 is used to compressively deform the shape-retaining member 4 into the fitting recess 3 while press-fitting the fitting portion 5 into the fitting recess 3. Then, the fitting portion 5 is restored after press fitting and fits into the fitting recessed portion 3.

Therefore, in either case of wiping off the characters written by the marker written on the marker board or wiping the characters written by the chalk written on the chalk board, the wiping surface for the marker board can be used. The materials 9 and the wiping surface material 12 for the chalk board are not distinguished, and the surfaces 7 and 8 obtained by superposing them are rubbed while being pressed against the writing surface.

Then, the characters on the marker are wiped off mainly by the wiping surface material 9 for the marker board, and the characters on the chalk are mainly wiped out by the wiping surface material 12 for the chalk board, especially in the former case. ,
A relatively soft wiping surface material 12 also wipes off fine dust such as characters due to the markers destroyed by the wiping surface material 9 attached to the writing surface of the marker board.

FIG. 5 shows the shape-retaining member 4 along the section line 1.
It shows another embodiment in the case of being composed of two divided shape-retaining members 15 and 16, one of the shape-retaining member 15 is made of a relatively rigid foam synthetic resin with a small foaming ratio, and its surface. The wiping surface material 9 for the marker board is overlapped from the divided surface to the side surface opposite to the divided surface so as to cover 7, and both ends thereof are fixed, and the other divided shape-retaining member 16 has a large foaming ratio. It is made of a relatively flexible foamed synthetic resin, and covers the surface 8 thereof. A wiping surface material 12 for a choke board is polymerized in a tension state from the dividing surface to the side surface opposite to this, and both ends thereof are fixed. The shape-retaining member 4 is formed by joining and fixing the divided surfaces of the two divided shape-retaining materials 15 and 16. Reference numeral 17 in the figure denotes a tension cloth piece interposed between the surface 8 and the wiping surface material 12 for the chalk board.

In FIGS. 6 and 7, the shape-retaining member 4 is formed into a vertical rectangular shape in plan view, and a dividing line 1 is provided so as to divide the wiping surface in two in the longitudinal direction thereof. On one side, a wiping surface material 9 for a marker board is provided on one side, and on the other side 8
FIG. 4 shows another embodiment in which the wiping surface material 12 for a chalk board is polymerized, and the shape retaining member 4 of the wiping surface material 9 for a marker board and the wiping surface material 12 for a chalk board is shown. The mounting means, the structure of the shape-retaining member 4, and the method of using the shape-retaining member 4 are substantially the same as those in the above-described embodiment.

In addition, in FIG. 8, the wiping surface of the shape-retaining member 4 is formed in a vertical rectangular shape in plan view, and a diagonal section line 1 extending from one corner of the shape-retaining member 4 to the opposite corner is provided. Another embodiment in which a wiping surface material 9 for a marker board is superposed on one surface 7 and a wiping surface material 12 for a choke board is superposed on the other surface 8 with the dividing line 1 as a boundary. FIG. 7 shows a means for attaching the wiping surface material 9 for the marker board and the wiping surface material 12 for the chalk board to the shape retaining member 4,
There is no substantial difference in the configuration and usage of the shape-retaining member 4 in the case of the first embodiment.

In FIG. 9, the shape-retaining member 4 is inclined in the relative direction with respect to the dividing line 1 that bisects the wiping surface in the lateral direction so that the two surfaces are inclined to form inclined surfaces 7a and 8a, respectively. Figure 1
In the case of 0, the shape-retaining member 4 is inclined in two relative directions with respect to the section line 1 that divides the wiping surface in the longitudinal direction, and the two surfaces in the longitudinal direction are inclined surfaces 7a and 8a, respectively. Further, FIG. 11 shows that the shape-retaining member 4 extends from one corner to the other opposite corner and is divided by the dividing line 1 that divides the wiping surface into two, and the two surfaces are inclined relative to each other. Another example is shown in which the inclined surfaces 7a and 8a are used.

In any of the embodiments shown in FIGS. 9 to 11, the marker board wiping surface member 9 is provided on one inclined surface 7a and the choke board wiping material is provided on the other inclined surface 8a. Each of the face materials 12 is superposed in a tensioned state, and a groove portion 14 is provided along the dividing line 1.
4, one end of each of the marker board wiping surface material 9 and the choke board wiping surface material 12 is interposed and fixed by an adhesive, and each of the other end portions is attached to the opposite side surfaces. As shown in FIG. 12, the shape-preserving member 4 is divided into two along the section line 1 and is composed of two divided shape-retaining members 15 and the divided shape-retaining members 15 and 15. Each of 16 has a wiping surface material for marker board 9
For forming the shape-retaining member 4 by polymerizing and fixing the wiping surface material 12 for the chalk board in a tensioned state and joining and fixing the two divided shape-retaining members 15 and 16 to each other.
This is the same as the case of the embodiment of FIGS. 1 to 8 described above.

[0018]

As described above, according to the present invention, it is possible to provide a ralf that can be commonly used for a marker board and a choke board by a single ralf, and it is possible to eliminate the disadvantages of the prior art and to use it. It is extremely convenient.

According to the third aspect of the present invention, in use, the wiping surface material can be easily selected by pressing the dividing line against the writing board and inclining the wiping surface to either side. .

Further, according to the structure of claim 4, there is an advantage that the shape-retaining members or structures of the respective suitable materials for the marker board and the choke board can be adopted.

Further, according to the fifth aspect of the invention, since the side end surface of the wiping surface material is exposed, after drawing the figure with a solid line,
If it is used for partial erasing such as in the case of a broken line figure, it is particularly easy to visually confirm and sharp erasing is performed, so that there is an effect that a beautiful partial erasing can be realized without blurring the erasing end of the line.

[Brief description of drawings]

1] Overall perspective view

[Figure 2] Central longitudinal cross-sectional view in the lateral direction

[Figure 3] Partial enlarged view of the wiping surface material for marker boards

FIG. 4 is a partially enlarged sectional view of a wiping surface material for a chalk board.

FIG. 5 is a longitudinal center sectional view in a lateral direction according to another embodiment.

FIG. 6 is an overall perspective view of another embodiment.

FIG. 7 is a longitudinal cross-sectional view of the longitudinal center of FIG.

FIG. 8 is an overall perspective view of still another embodiment.

FIG. 9 is an overall perspective view of another embodiment corresponding to FIG.

10 is an overall perspective view of another embodiment corresponding to FIG.

11 is an overall perspective view of another embodiment corresponding to FIG.

12 is a central sectional view of another embodiment corresponding to FIG.

[Explanation of symbols]

 1 division line 2 gripping member 3 fitting concave portion 4 shape retaining member 5 fitting portion 6 bulging portion 7, 8 surface 7a, 8a inclined surface 9 marker board wiping surface material 10 base cloth 11 loop element 12 for choke board Wiping surface material 13 Recessed groove 14 Groove portion 15 Split shape retention member for marker board 16 Split shape retention member for choke board 17 Cloth piece for tension

Claims (11)

[Claims] 1. The wiping surface of the wiping part is composed of two surfaces divided by a parting line extending from one end to the other end facing the wiping part, one of which is used for a marker board. Rahul used for erasing writing boards, characterized in that the other side is composed of a wiping surface material for a chalk board, and the other surface is composed of a wiping surface material for a chalk board. 2. A gripping member having a fitting recess at the center of the inner surface, a fitting part fitted into the fitting recess, and a bulging part bulging from the inner surface of the gripping member. The shape-retaining member having two surfaces formed on the surface of the part from one end to the other end facing the other, and the surface of the shape-retaining member covering the one surface. The marker board wiping surface material, and a marker board wiping surface material that is polymerized on the surface of the shape-retaining member so as to cover the other surface, and the marker board wiping surface material. Raffle used for a writing board for erasing, characterized in that a wiping surface is formed by a wiping surface material for a chalk board. 3. The ruffle used for an erasing writing board according to claim 1, wherein the two surfaces are inclined relative to each other with a section line as a boundary. 4. A marker board is provided along a dividing line, and one end of each of the wiping surface material for a marker board and the wiping surface material for a choke board is interveningly fixed in the groove portion to fix the marker board. 5. A ralfule used for an erasing writing board according to claim 1, wherein the other end of each of the wiping surface material for a chalkboard and the wiping surface material for a chalk board are fixed to opposite side surfaces of a shape-retaining member. . 5. A shape-retaining member is divided into two along a parting line, one shape-retaining member is superposed with a wiping surface material for a marker board so as to cover the surface, and the other shape-retaining member is divided. The erasing writing board according to claim 1, wherein the member is formed by superposing a wiping surface material for a chalk board so as to cover the surface of the member, and joining the divided surfaces of the two divided shape-retaining members. Rahul used for. 6. The shape-imparting member is superposed on one side surface of the wiping surface member, and the other side surface of the shape-retaining member exposes end surfaces of the both wiping surface members. Rahul used for erasing writing board described in 4 or 5. 7. The wiping surface has a vertical rectangular shape in plan view, and the dividing line extends so as to bisect the wiping surface in the lateral direction. Rahul used on the writing board to be erased according to 6. 8. The wiping surface has a vertical rectangular shape in plan view, and the dividing line extends so as to bisect the wiping surface in the longitudinal direction. Rahul used for writing board to erase the description. 9. The wiping surface has a vertical rectangular shape in plan view, and the dividing line extends from one corner to the other opposite corner, or 1, 2, 3, 4, 5 or Rahul used on the writing board to be erased according to 6. 10. The wiping surface material for a marker board comprises a plurality of loop elements standing upright on a base cloth surface.
Raffle used for erasing writing board described in 3, 4, 5, 6, 7, 8 or 9. 11. The wiping surface material for a chalk board is formed by implanting a large number of thin and soft short pieces on a relatively soft base cloth surface. Rahul used for erasing writing board described in 9 or 10.