JPH08183295A - White board eraser - Google Patents

Abstract

PURPOSE: To provide a white board eraser with an excellent erasing performance and reduced likelihood of leaving ink dross solidified on the surface to be erased. CONSTITUTION: Spherical parts are formed on each tip end of synthetic fiber with a thickness of 20 to 80 denier, and the synthetic fiber is made into a fiber bundle 2a, wherein the fiber bundles are bristled on the basement 1 so that the outer diameter (d) in the bristled surface (1a) of one synthetic fiber (2a) comes to be 2mm or shorter, and the projection length (h) from the bristle surface (1a) comes to be 4 to 8mm, and further the distance 1 between the centers of individual fiber bundles (2a) is at most two times the outer diameter in the bristle surface of one fiber bundle (2a), and also the lines passing through the centers of individual fiber bundles are arranged not to be in the same straight line in the bristle surface of the basement. As a consequence of this constitution, an appropriate flexibility of the fiber bundle serves to erase handwriting, then a proper dislocation among respective fibers prevents ink dross from being solidified in a mass on the surface of the eraser, thereby obtaining a good erasing performance having no unerased parts of handwriting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a whiteboard erasing tool used for writing boards such as whiteboards and electronic blackboards, and in particular, it has good handwriting erasing performance and produces a lump of eraser. The present invention relates to an eraser for a white plate that is hard to adhere to the surface.

[0002]

2. Description of the Related Art Writing boards such as whiteboards and electronic blackboards have shown remarkable spread in place of conventional painted blackboards. As a marker for these writing boards, a marker for whiteboard is used after all using an ink composed of a pigment, a dispersant, a resin, a solvent and a release agent.

The handwriting with the whiteboard marker is composed of a colored layer containing a pigment and a resin as main components, and an oil layer composed of a release agent formed between the colored layer and the writing plate. The handwriting is wiped with an erasing tool whose wiping portion is made of cloth or the like, so that the handwriting can be removed from the writing plate and erased.

In the conventional erasing tools of this type, those using a plain woven fabric such as a cloth, a pile woven fabric, a sponge, a felt, a non-woven fabric and the like are mainly used. Also, for example, the actual Kaihei 5-9
As disclosed in Japanese Patent No. 3896, there is proposed a device in which a wiping portion is formed by raising fibers having different thicknesses.

[0005]

By the way, according to the conventional erasing tool using the above-mentioned plain weave, pile weave, sponge, felt, non-woven fabric, etc. as the wiping member, the lump of ink residue becomes more and more erasable as it is used. It tends to solidify and adhere to the surface (especially the edges). If a lump of ink residue adheres to the surface of the erasing tool to some extent, it is stated in the instruction manual etc. that it should be used after cleaning the surface of the erasing tool, but almost regular cleaning is not performed. The reality is that there is none.

When the erasing tool having the ink residue adhered to a certain extent or more is used, the solid content and the oil content adhered to the surface of the erasing tool are rubbed against the writing board, so that the writing material adheres to the writing board. Since the plate is white, it has a technical problem that stains are noticeable.

Further, as disclosed in Japanese Utility Model Laid-Open No. 5-93896, even in an eraser in which a wiping portion is formed by raising fibers having different thicknesses, the handwriting is crushed by the thick fibers with little bending. However, since the fine fibers existing between the thick fibers hold the crushed ink residue, it has the problem that it eventually solidifies and adheres to the fibers.

The present invention has been made in order to solve the technical problems of the above-mentioned conventional ones, and by implanting a fiber bundle of a predetermined size at a predetermined interval on a base, An object of the present invention is to provide an erasing tool for a white plate, which can prevent ink residue from solidifying on the surface due to appropriate bending of fibers during erasing and misalignment of fibers.

[0009]

The eraser for a white plate of the present invention made to achieve the above object has a thickness of 20 to 80.
Denier synthetic fibers are used as fiber bundles, and the fibers are flocked to the base so that the diameter of flocking holes on the flocking surface of one fiber bundle is 2 mm or less and the protruding length from the flocking surface is 4 to 8 mm. The distance between the centers of the individual flocked holes is not more than twice the flocked hole diameter on the flocked surface of the one fiber bundle,
A erasing tool for a white plate, wherein the lines connecting the centers of the individual flocked holes are arranged so as not to be on the same straight line on the flocked surface of the base, and the spherical end portion of the synthetic fiber having a thickness of 20 to 80 denier is used. It is characterized in that a part is formed.

[0010]

In the whiteboard erasing tool having the above-mentioned structure, the synthetic fiber having a predetermined thickness is used as the fiber bundle, and the distance between the centers of the individual fiber bundles is twice the diameter of the flocking hole on the flocking surface of one fiber bundle. The hair is planted at a predetermined interval so that
Therefore, when erasing the handwriting, the writing lines on the writing board are finely crushed and peeled off at the tips of the individual flocked holes. Moreover, since the spherical portion is formed at the tip of the synthetic fiber having a thickness of 20 to 80 denier, the writing line on the writing plate can be more completely peeled off by the spherical portion. Also, since it is possible to generate an appropriate bending in each fiber,
It is possible to prevent ink debris from agglomerating and solidifying on the surface of the erasing tool due to misalignment of fibers. As a result, it is possible to always secure a relatively clean surface of the fiber bundle. And
Since the lines that connect the centers of the individual flocked holes are planted on the base so that they are not on the same line on the flocked surface of the base, excellent erasing performance with no erasure residue can be obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An eraser for a white plate according to the present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view showing an eraser for a white plate according to the present invention. The base 1 used as the grip portion is formed in a rectangular parallelepiped shape from synthetic resin such as polypropylene. One side surface of this base 1 is made into a flocked surface 1a, and synthetic fibers are made into a fiber bundle,
The wiping part 2 is formed by planting the fiber bundles at equal intervals.

FIG. 2 is an enlarged cross-sectional view showing the state of the flocking of the wiping part 2 formed on the base 1. The wiping unit 2 uses a synthetic fiber having a thickness of 20 to 80 denier as the fiber bundle 2a so that the diameter f of the flocking surface 1a of one fiber bundle 2a is 2 mm or less, and the protrusion from the flocking surface 1a. The hair is planted on the base 1 so that the length h is 4 to 8 mm. The distance l between the centers of the holes of the individual fiber bundles 2a to be transplanted on the flocked surface 1a is equal to
Flocking is performed so as to be less than or equal to twice the diameter d of the flocked hole on the flocked surface 1a of a, that is, 4 mm or less when the diameter d of the flocked hole is 2 mm.

Each fiber bundle 2a is bent in a U shape as shown in FIG. 2, and each fiber bundle 2a is individually attached to the base 1 by the stoppers 3 at the deepest portion of the folding. Installed.

FIG. 3 shows a synthetic fiber 2 which constitutes each fiber bundle 2a.
It is an enlarged view of b, and as shown in the figure, a spherical portion 2c is formed at the tip of the synthetic fiber 2b. This spherical part 2
The spherical diameter of c is about 1.2 to 2.5 times the diameter of the synthetic fiber 2b. Further, FIG. 4 is a view showing a state in which the handwriting B on the writing board A is peeled off by the spherical portion 2c. As shown in FIG. 4A, the spherical portion 2c at the tip of the synthetic fiber 2b is removed. The handwriting B is peeled off from the writing plate A by the peripheral surface, and the peeled ink residue can be prevented from moving along the peripheral surface of the spherical portion 2c and solidifying as a mass of the separated ink residue. Further, FIG. 4 (b) is a view showing a peeled state of the handwriting B when the spherical portion is not formed, and the handwriting B can be peeled in this state, but the synthetic fiber is more than this. When 2b bends, the peripheral surface (side surface) of the synthetic fiber 2b contacts the handwriting B, so that the handwriting B cannot be separated. However, as shown in FIG. 4C, when the spherical portion 2c is formed, the peripheral surface of the spherical portion 2c contacts the handwriting B, so that the handwriting B can be peeled off.

FIG. 5 shows a flocking pattern of each fiber bundle 2a with respect to the flocked surface 1a of the base 1. The flocked surface 1a is shown in FIG.
Is shown as a schematic diagram when viewed from above. As shown in FIG. 5, the lines connecting the centers of the individual fiber bundles 2a to be planted on the flocked surface 1a are arranged so as not to be on the same straight line on the flocked surface 1a of the base 1. That is, in the example shown in FIG. 5, the first units U1 are arranged in a grid pattern so that the lines connecting the centers of the hair-implanted holes of the individual fiber bundles 2a face the first direction F1 and are in parallel with each other. And the lines connecting the centers of the flocked holes of the individual fiber bundles 2a are arranged in a grid pattern so as to be parallel to each other in the second direction F2 different from the first direction F1.
It is composed of a unit U2. Then, on the flocked surface 1a shown in FIG. 5, the first unit U1 is arranged in the upper left and the lower right divided into a field shape, and the second unit U is also provided.
2 is located in the upper right and lower right.

Regarding the arrangement pattern of the flocked holes of each fiber bundle 2a as described above, when considering the case where the fiber bundles 2a are arranged in a lattice pattern, for example, three representative patterns as shown in FIG. 6 are considered. be able to. FIG. 6 (A) shows the case where the angle (α1) between the direction F1 of each line connecting the centers of the flocked holes of the fiber bundle 2a and the end face of the base 1 is about 90 degrees. It corresponds to the first unit U1 shown in FIG. Further, FIG. 6 (B) shows an angle (α3) between the direction F3 of each line connecting the centers of the flocked holes of the fiber bundle 2a and the end face of the base.
Shows the case where the angle is about 60 degrees. Furthermore, FIG.
(C) shows the case where the angle (α2) between the direction F2 of each line connecting the centers of the flocked holes of the fiber bundle 2a and the end face of the base 1 is about 45 degrees, which is shown in FIG. It corresponds to the second unit U2 shown.

In the erasing tool shown in FIG. 5, the two types of arrangement patterns shown as (A) and (C) in FIG. May be simply arranged on the left and right, or three types of patterns may be combined.

As the material of the fibers constituting each fiber bundle 2a, polyamide type such as 6,6 nylon, polyolefin type such as polypropylene, PET (polyethylene terephthalate). PBT (Polybutylene terephthalate)
Polyesters such as g) can be used.

At this time, if the protruding length h of the fiber bundle 2a from the flocked surface 1a is less than 4 mm, the bending of the fiber is not sufficiently utilized and the erasability is insufficient, and if it exceeds 8 mm, Similarly, the erasability is insufficient because the fiber bends too much. Therefore, the protrusion length h of the fiber bundle 2a from the flocked surface 1a is preferably 4 to 8 mm.

When the thickness of the synthetic fibers to be flocked is less than 20 denier, the fibers are excessively bent and the erasability is insufficient, and when the thickness of the synthetic fibers exceeds 80 denier,
A writing plate having a surface made of a soft material such as a film may be scratched, and the fibers may become rigid, resulting in poor usability. Therefore, the thickness of each synthetic fiber formed as a fiber bundle is preferably in the range of 20 to 80 denier.

Furthermore, since the spherical portion is formed at the tip of the synthetic fiber, the handwriting B can be peeled off from the writing plate A by the peripheral surface of the spherical portion 2c at the tip of the synthetic fiber 2b.
Sufficient erasability can be secured even if the fiber is slightly bent. Also, the peeled ink residue is the spherical portion 2c.
Since it moves along the peripheral surface, the peeled ink residue can be prevented from solidifying in a lump. The spherical diameter of the spherical portion is preferably about 1.5 to 2.2 times the diameter of the synthetic fiber 2b.

In addition, when the distance between the individual fiber bundles that have been transplanted is large and they are arranged in the same straight line, unerased portions are likely to remain during erasing. Generally, when the distance between the centers of the flocked holes of each fiber bundle exceeds twice the flocked hole diameter on the flocked surface of each fiber bundle, depending on the density of the individual fiber bundles that have been flocked. The surface density of the fiber bundle decreases, and a portion where the fiber bundle does not sufficiently contact the writing plate occurs. Therefore, depending on the erasing method, unerased portions are likely to remain and the erasing performance tends to be insufficient.

Therefore, the diameter of the flocked holes on the flocked surface of the fiber bundle is set to 2 mm or less, the distance between the centers of the individual flocked holes is set to twice the flocked hole diameter on the flocked surface of the fiber bundle, and the individual fibers are It is necessary to plant hair so that the bundle is not in the same straight line.

Next, concrete examples and comparison results regarding the erasing performance will be shown. Example 1 A spherical portion having a spherical diameter of 0.14 mm was formed at the tip portion, and the length was 5 mm.
As shown in FIG. 7, a denier for whiteboard was obtained by planting nylon fibers having a thickness of 40 denier in a 1.7 mm diameter hole of a polypropylene base so that the distance between the flocked holes of each fiber bundle was 3 mm. It was Example 2 A spherical portion having a spherical diameter of 0.20 mm was formed at the tip portion, and the length was 6 mm.
As shown in FIG. 8, a nylon denier having a thickness of 80 denier was flocked into a hole of polypropylene base having a diameter of 2 mm so that the distance between the flocking holes of each fiber bundle was 3.5 mm to obtain an eraser for a white board. It was

Comparative Example 1 A spherical portion having a spherical diameter of 0.14 mm was formed at the tip portion, and the length was 5 mm.
As shown in FIG. 9, a nylon denier having a thickness of 40 denier is planted in a 1.7 mm diameter hole of a polypropylene base so that the distance between the flocked holes of each fiber bundle is 3 mm to obtain an eraser for a white board. It was Comparative Example 2 A nylon fiber having a length of 9 mm and a thickness of 100 denier was prepared as shown in FIG.
As shown in, the diameter of the polypropylene base is 2.5 mm
An erasing tool for white plate was obtained in which the distance between the centers of the respective fiber bundles was set to 5.5 mm in each of the holes in (3). Comparative Example 3 A commercially available whiteboard eraser manufactured by Company A using a cloth as a wiping part was prepared.

Table 1 shows the results of the erasing performance test conducted using the whiteboard erasing tools prepared as Examples 1 and 2 and Comparative Examples 1 and 2. The results shown in Table 1 were written on a 60 cm square surface of a whiteboard manufactured by Company A using PWB-7M (black) manufactured by Mitsubishi Pencil Co., Ltd. as a marker, and the handwriting was recorded in Examples 1 and 2 and Comparative Example. This is erased by using the eraser for white plate prepared as Examples 1 and 2. The repeated erasability and the stain resistance of the white plate were evaluated by repeating writing and erasing and using one of the PWB-7M (black).

[0027]

[Table 1]

The meanings of the evaluation symbols showing the results in Table 1 are as follows. ◎ …… Writing can be completely erased. Almost no dirt on the white board. ○: Some wiping residue is visible. The dirt on the white board is a little noticeable. △: Unwiping can be seen. The dirt on the white board is noticeable. * 1 …… Part of the unwiping can be seen depending on the wiping direction.

[0029]

As is apparent from the above description, claim 1
According to the whiteboard erasing tool described in (1), a synthetic fiber having a thickness of 20 to 80 denier is used as the fiber bundle, and the distance between the centers of the individual flocked holes is equal to 2 of the flocked hole diameter on the flocked surface of one fiber bundle.
Since the hair is planted at a predetermined interval so that the number of times is less than twice, when erasing the handwriting by the appropriate flexibility of the fiber bundle, the writing line on the writing plate is finely crushed at the tip of each fiber and peeled off. be able to.

Moreover, since the spherical portion is formed at the tip of the synthetic fiber, the handwriting B can be peeled off from the writing plate A by the peripheral surface of the spherical portion 2c at the tip of the synthetic fiber 2b. Even if there is a large amount of bending, sufficient erasability can be secured. Further, since the peeled ink residue moves along the peripheral surface of the spherical portion 2c, it is possible to prevent the peeled ink residue from solidifying as a lump. Further, at this time, it is possible to prevent the ink residue from clumping and solidifying on the surface of the erasing tool even when the fibers are displaced from each other. And since the lines connecting the centers of the individual flocked holes are flocked to the base so that they are not on the same straight line on the flocked surface of the base,
It is possible to obtain excellent erasing performance with no erasure left.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a whiteboard erasing tool according to the present invention.

FIG. 2 is a partially enlarged sectional view of the embodiment shown in FIG.

FIG. 3 is a partially enlarged sectional view of a synthetic fiber in the example shown in FIG.

FIG. 4A is a diagram showing a peeled state of ink in an example, and FIG. 4B is a diagram showing a peeled state of ink when a spherical portion is not formed at a tip portion of a synthetic fiber. , (C) are diagrams showing a peeled state when the bending of the synthetic fiber shown in (a) is large.

FIG. 5 is a schematic diagram showing a state in which the hair transplant patterns shown in FIG. 6 are combined.

FIG. 6 is a schematic diagram showing a flocking pattern of each fiber bundle of the whiteboard eraser according to the present invention.

FIG. 7 is a schematic diagram showing a flocking pattern of a whiteboard erasing tool of the present invention, which was created for conducting a comparative experiment of erasing performance.

FIG. 8 is a schematic diagram showing another flocking pattern of the whiteboard eraser of the present invention, which was also created for the purpose of conducting a comparative experiment of erase performance.

FIG. 9 is a schematic diagram showing a flocking pattern of a whiteboard eraser different from that of the present invention, which was created to perform a comparative experiment of erase performance.

[Explanation of symbols]

 1 Base 1a Flocking surface 2 Wiping part 2a Fiber bundle 2b Fiber 2c Spherical part 3 Stopper

Claims (1)

[Claims] 1. A synthetic fiber having a thickness of 20 to 80 denier is used as a fiber bundle so that the diameter of the flocked hole on the flocked surface of one fiber bundle is 2 mm or less, and the protruding length from the flocked surface is 4 to 8 mm. So that the distance between the centers of the individual flocked holes is less than twice the diameter of the flocked holes on the flocked surface of the one fiber bundle, and the centers of the individual flocked holes are connected. A whiteboard erasing tool arranged so that the lines are not aligned on the flocked surface of the base, wherein a spherical portion is formed at the tip of the synthetic fiber having a thickness of 20 to 80 denier. Erase tool for white board.