JPH09254580A - Roller for writing instrument or coating tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the wear resistance and corrosion resistance and to maintain the excellent lubricity by surface treating of the outer surface of a roller. SOLUTION: A TiN film 6 is formed on the outer surface 2a of a material 2b. When the outer surface 2a of the roller 2 is formed with the wear resistant and corrosion resistant surface, it is plated except it, the outer surface is formed with a combining layer by forming Al Ni or Cr or an Ni-Cr alloy layer on the outer surface, treating with ionic nitriding and combining it based on Fe2-3N or Fe4N on the outer surface. Thus, the wear of the outer surface can be reduced irrespective of the material of the roller, and the corrosion with ink and coating liquid can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument or an applicator in which a tip provided with a roller at a tip portion of a tip holder is fixed to an open portion of a barrel body, and to an improvement of the roller. The present invention relates to a roller for a writing instrument or an applicator, which has excellent wear resistance and corrosion resistance and high lubricity.

[0002]

2. Description of the Related Art Conventionally, a tip provided with a roller at the tip of a tip holder is fixed to an open portion of a barrel body,
There has been proposed a writing instrument or applicator for transmitting ink, correction fluid, glue, paint or the like contained in a barrel body to a roller to perform writing or application by rotation and / or displacement thereof. That is, by the rotation of the roller, the outer surface of the roller directly contacts the writing surface or the coating surface to obtain a smooth writing comfort and a wide handwriting or coating surface,
By rotating, it is possible to write or apply thick lines, and it is used as a convenience when drawing or painting a wide surface all at once.

However, the above-mentioned conventional writing instrument or applicator has a drawback that it can write or apply thick lines but cannot write or apply thin lines. Therefore,
One of the inventors of the present invention, in order to eliminate the drawbacks of the above-mentioned writing instrument or applicator, in addition to a wide handwriting or coating surface, it is possible to obtain a narrow handwriting or coating surface in combination, We proposed a bearing that holds the ball at both ends of the roller, abut the ball on the bearing, and rotatably hold the roller and the ball at the tip of the chip holder. (Japanese Patent Application No. 7-70863, Japanese Patent Application No. 7-745
(No. 61)

However, with regard to the writing instrument or the applicator in which the conventional roller such as the former is arranged at the tip of the tip holder, a resin material is generally used as a material that can be easily formed into a roller. Since the hardness is low and the abrasion resistance is insufficient, the roller is severely damaged. That is, when writing (or applying), the outer surface of the roller is pressed against the paper surface and moved while rotating or displacing the roller, so the roller is moved by the friction between the roller and the paper surface and the friction between the roller and the chip holder. There was a case where the roller was worn and problems such as non-smooth rotation of the roller and leakage of ink (or coating liquid) occurred.

Further, regarding a writing instrument or an applicator in which balls are brought into contact with both ends of a roller of the prior art such as the latter, and these are arranged at the tip of a tip holder, a resin material is used for the rollers in the same manner. However, if the ball is made of wear-resistant cemented carbide that is commonly used in ballpoint pens, for example, the outer surface of the roller will wear as well, but the ball will not be attached to the outer edge of the roller. The bearing seat that abuts and holds it also wears because it is rubbed by the rotation of the roller and the ball. Therefore, there is a problem that the rotation of the roller is not smooth due to abrasion, or ink (or coating liquid) leaks, and the lubricity is maintained even during long-distance writing or long coating, and the light or shade on the handwriting or coating surface It has been desired to develop a roller for a writing implement or an applicator without break.

[0006]

When writing (or applying), when a roller, for example, brass, is used to solve this problem at the time of writing (or application), it is excellent in cutting workability and inexpensive. There are some points, but the problems of wear resistance and corrosion resistance remain. Besides brass,
It is conceivable to use a bearing steel or carbon steel, or a metal material such as nickel silver or aluminum alloy, but they have similar problems. Therefore, we think that the roller should be formed of stainless steel material with excellent corrosion resistance, but when writing (or applying), in addition to abrasion with the writing surface, use the roller for writing on paper etc. Since it is pressed against the surface and rotated,
The roller is rubbed with the seat part that receives the roller provided inside the chip holder, or rubs against the inner surface of the tip part of the chip holder that holds the roller.
When it is used for a long period of time, the roller gradually wears, and the roller may be deformed and hinder the rotation of the roller. Due to this, there is a difficulty in causing ink leakage. For writing implements (or applicators) that hold balls on both ends of the roller, if stainless steel is used for the rollers and cemented carbide is used for the balls, ink (or coating liquid) can be used alone for each material.
Although it shows good corrosion resistance against the like, when used in combination, the rollers and balls are electrically connected by contacting with each other, and the corrosion of dissimilar metal that occurs when a battery is constructed between them is prevented. There is a problem that the writing performance (or the coating performance) is deteriorated by causing it. When a steel material is used for the balls, ink (or coating liquid) or the like causes corrosion such as rust on the surface of the ball, and the roller may be worn due to unevenness on the surface of the ball due to the corrosion.

As a material other than the above-mentioned metal materials, it is possible to use a material made of a material having high wear resistance for the roller, for example, cemented carbide, but cemented carbide is an excellent material. However, it is not suitable for practical use because it raises the cost of parts and has an economic problem.

Next, during non-writing (or non-coating), the writing tool (or applicator) usually has a tip structure in which ink leakage, ink dripping and the like do not occur even with the tip of the tip facing downward. In particular, a writing instrument (or an applicator) is provided in which bearings are provided at both ends of the roller, balls are abutted on the bearings, and the roller and the ball are rotatably held at the tip of the tip holder. With respect to, the tip of the chip holder, the roller and the ball are kept airtight so that there is no problem in performance. However, the roller and the ball start to project outward from the tip of the chip holder, and the intersection where the roller and the ball come into contact with each other is blocked by the viscosity and surface tension of the ink or the residue after the ink is dried. If a gap that cannot be removed is generated, problems such as ink leakage and ink dripping will occur.
Usually, this gap is sealed with a residue such as ink, but during writing, the residue is peeled off by the rotation of a roller or a ball. It should be noted that this gap is generated when the bearings provided at both ends of the roller and the ball come into contact with each other and rotate.
It is often the case that the seat is worn.

Further, when such a gap is formed, the roller and the ball come into contact with each other when the ink (or the coating liquid) is transferred or penetrates from the roller to the writing surface (or the coating surface) during writing (or coating). In addition, a part of the ink is likely to remain on the outer contour portion where the roller and the ball project from the chip holder, and so-called bloating occurs. The term “bottom” refers to a phenomenon in which excess ink that remains without being transferred to the writing surface accumulates in the gap between the chip holders and causes dripping on the writing surface.

In addition, when the surface roughness of the seat of the roller that contacts the ball is rough, the roller and the ball are difficult to rotate smoothly because the friction coefficient is large. For this reason, there arises a problem that blurring occurs in the handwriting, and an offensive sound is likely to occur.

The present invention has been made in view of the above circumstances, and its object is mainly to improve a roller for a writing instrument or an applicator, in which the outer surface of the roller is abrasion-resistant and corrosion-resistant. The writing instrument or applicator has improved performance, reduces roller damage, maintains good lubricity even during long-distance writing or long-distance application, and has high performance without shading or liquid breakage on the handwriting or application surface. Is to provide a roller for use.

[0012]

The present inventor has the following constitution in order to solve the problems detailed above. That is, according to the invention of claim 1, a barrel body that contains a liquid such as ink or a coating liquid and that has a tubular release portion, a tip fixed to the release portion of the barrel body, and the tip are provided. A roller rotatably held inside at least part of which protrudes outward, and the liquid such as the ink or the coating liquid is transmitted to the roller to rotate and / or displace the roller. According to the above, in the writing instrument or the application instrument for writing or applying, the outer surface of the roller is surface-treated.

Further, according to a second aspect of the present invention, there is provided a barrel body which contains a liquid such as ink or a coating liquid and has a tubular release portion, and a tip fixed to the release portion of the barrel body. A roller that is rotatably held by a part of the tip protruding outward, and is in contact with an outer end portion of the roller, and a part of the roller protrudes outward and is rotatably held by the roller. And a ball, and a liquid such as an ink or a coating liquid is transmitted to the roller and / or the ball to write or apply by rotating and / or displacing the roller and / or the ball. In the above, the outer surface of the roller is surface-treated.

Further, the invention of claim 3 is characterized in that the outer surface of the roller has a coating layer made of at least one kind of carbide, nitride or solid solution of Ti, V or Cr metal.

Further, in the invention of claim 4, the outer surface of the roller may be formed of an alloy layer containing Ni, Cr or a metal thereof.

Further, in the invention of claim 5, the outer surface of the roller may be formed of a compound layer based on Fe2-3N or Fe4N.

According to a sixth aspect of the present invention, in the second aspect of the invention, the roller is formed of a pipe-shaped hollow body, and the outer end of the roller contacts the ball, It is characterized in that a tapered seat is formed at the end of the roller.

According to a seventh aspect of the invention, in the second or sixth aspect of the invention, the ridgeline formed by the outer surface of the roller and the seat is formed to have a sharp edge. I am trying.

Further, the invention of claim 8 is characterized in that, in the invention of claim 2 or 6, the seat has a coating or plating layer of a fluororesin formed on the surface thereof.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto. In the embodiments, the same members and the same portions are denoted by the same reference numerals.

A first embodiment of a roller for a writing instrument or an applicator according to the present invention will be described with reference to FIGS. 1 and 2. First Embodiment FIG. 1 is a schematic cross-sectional view of a tip portion of a writing instrument or applicator roller according to the present invention. Writing instrument A is tip 1
And the barrel body 4 as a main member. FIG.
In the above, the shaft cylinder main body 4 containing the liquid of the ink 5 and having the cylindrical releasing portion 4a is an integral cylindrical body formed of a resin material that suppresses evaporation of ink, and the tip 1 is attached to the releasing portion 4a.
Is fixed. The tip 1 is composed of a tip holder 3 made of a brass material and a writing roller 2, and the roller 2 is rotatably held at the tip of the tip 1.
2 is a cross-sectional view taken along the line I-I in FIG. 1. Inside the chip holder 3, a roller holding chamber 3a for inserting the roller 2 and a roller 2 on the paper surface at the time of writing. A seat 3c is provided to prevent the roller 2 from entering the inside of the chip holder 3 when pressing the roller. At the tip of the chip holder 3, a part of the roller 2 projects outward. 3 to be suppressed
b is provided. The chip holder 3 may be made of metal such as stainless steel or the like in addition to brass, or may be made of resin other than metal by injection molding. For a writing instrument that uses low-viscosity ink, a spring (not shown) is provided in the tip holder 3 so that the ink 5 does not leak from the tip of the tip 1, and the roller 2 is repelled by this spring to repel the tip holder 3 The roller mechanism may be formed by closely contacting the roller 2 to the inner surface of the tip portion 3b of the.

The roller 2 is a main part according to the present invention, and the material 2b is made of stainless steel, and is a cylindrical rod having an outer diameter of 0.95 mm and a length of 4 mm. The shape of the roller 2 may be a hollow pipe shape instead of a cylindrical rod, and the same effect can be exhibited. The roller 2 is made of stainless steel, but as the material, in addition to stainless steel, bearing steel or carbon steel, or nickel, brass, aluminum alloy, or other metal material may be used. As another material, a resin or the like that is not corroded by ink may be used and formed.

FIG. 3 shows a partial cross section of the roller 2. A TiN coating 6 is formed on the outer surface 2a of the material 2b. When forming the outer surface 2a of the roller 2 on a surface having abrasion resistance and corrosion resistance, plating treatment is performed on the outer surface with Ni, Cr or an alloy layer containing these, in addition to the above-mentioned cases. Can be formed,
It is also possible to perform ion nitriding treatment and form the outer surface with a compound layer based on Fe2-3N or Fe4N.

Next, the manufacturing process of the roller 2 will be briefly described. The outer diameter of the roller 2 is 0.95 mm
Using a stainless steel rod with a length of 600 mm, cut into a predetermined length of 4 mm. Burrs generated by cutting should be minimized and finally removed by barreling. In addition, in order to make the surface roughness of the outer surface 2a of the roller 2 as fine as possible, the material 2b of the roller 2 may be subjected to chemical polishing, lapping, buffing, or the like in advance. Next, a TiN coating film of 3 μm is formed on the outer surface 2a and the end surface 2d by a chemical vapor deposition method. Normally, the surface hardness of stainless steel is about 350 Hv, but when the roller surface 2c with the TiN film formed thereon was measured with a micro hardness meter, 2300 Hv was obtained. After that, in order to make the roller surface 2c a mirror finish, it is polished and finished with diamond powder. The roller surface 2c
In order to improve the affinity with the ink 5, the roller surface 2c may be made to have a matte surface within a range not hindering the rotation of the roller 2 without making the mirror surface finish. The step of cutting the above-mentioned stainless steel rod and forming the material of the roller 2 may be performed after forming the TiN film on the outer surface 2a by the chemical vapor deposition method. At this time, there is an effect that burrs and burrs etc. generated by cutting are minimized by the TiN coating film 16 formed on the outer surface 2a of the roller 2, but in some cases, the end surface 2d of the roller 2 requires post-processing. Sometimes.

Here, the basic operation of the writing tool or applicator roller of the embodiment of the present invention will be described.
In the writing instrument A in which the tip 1 in which the roller 2 finished in the above manufacturing process is incorporated in the tip holder 3 is fixed to the barrel body 4, when the tip of the tip 1 is moved downward during writing, the ink 5 will The ink flows into the holder 3 and the roller holding chamber 3a is filled with the ink 5. When writing, hold a writing shaft (not shown) by hand and first press the roller 2 against the paper surface, the roller 2 is displaced in the tip holder 3 and abuts on the seat portion 3c. When the roller 2 is moved while rotating in this state, the ink 5 in the roller holding chamber 3a is transferred from the roller surface 2c to the paper surface, and a desired wide line can be drawn.

That is, in the writing or applicator roller of the present invention, the TiN coating film 6 is formed on the outer surface 2a of the roller 2, so that the roller 2 is the seat portion 3c in the tip holder 3 or the tip holder 3 is formed. When rotating while abutting on the inner surface of the tip portion 3b, since the resistance due to friction is small, the roller always rotates smoothly, and it is possible to obtain the one having no shading or liquid running on the handwriting or the application surface.

Now, in order to confirm the effect of the roller for a writing implement or an applicator of the present invention, a long-distance writing performance was tested on concrete having hardness as a writing surface, but the lubricity was always maintained even on concrete. I was able to draw a thick line without any problems. Further, when the roller surface 2c of the roller 2 was observed, no damage such as abrasion or scratches occurred.

Next, a second embodiment of the writing tool or applicator roller according to the present invention will be described with reference to FIGS. Second Embodiment FIG. 4 is a schematic cross-sectional view of a tip portion of a writing instrument or applicator roller according to the present invention. Writing instrument B is tip 1
0 and the barrel body 14 are configured as main members.
In FIG. 4, the shaft cylinder main body 14 that contains the liquid of the ink 15 and is provided with the cylindrical releasing portion 14a is an integral cylindrical body that is formed of a resin material that suppresses evaporation of the ink.
The chip 10 is fixed to a. The tip 10 is a tip holder 13, a writing roller 11 that is a pipe-shaped hollow body having a hole in the center, and both ends of which are formed with tapered receiving seats 11 d, and a roller 11. Writing ball 1 abutted on the seat 11d
2, the roller 11 and the ball 12 to the chip holder 1
3 and a spring 18 that elastically springs to the inner surface of the tip portion 13b of the tip 3, part of the tip 10 protrudes outward,
Moreover, the roller 11 and the ball 12 are rotatably held. The spring 18 may be omitted depending on the type of the ink 15 contained therein. Then, as shown in FIG. 5, the ridge line 11e, which is the both edges of the roller 11, is formed.
Is formed with a sharp edge, and a seat 1 of the roller 11 is formed.
When the ball 12 is brought into contact with 1d, the surface of the ball 12 and the ridgeline 11e of the roller 11 come into close contact with each other. FIG. 6 shows the roller 1
1 shows a state in which balls 12 are in contact with and held at both ends of the chip 1, and these are rotatably held at the tip of the chip 10, and is an explanatory view of the chip 10 seen from directly above.

The ball 12 is made of a cemented carbide with a sphere of 1.0 mm, the roller 11 is made of a stainless steel pipe material, and the dimensions are an outer diameter of 0.95 mm, an inner diameter of 0.6 mm and a hollow length of 3 mm. It is made of shaped objects. The roller 11 is made of stainless steel, but as a material, in addition to stainless steel, bearing steel or carbon steel, or nickel silver,
A metal material such as brass or aluminum alloy may be used, or a resin other than metal that is not corroded by ink may be used.

FIG. 7 shows a cross section of the roller 11. A TiN coating film 16 is formed on the outer surface 11a of the material 11b. In addition, when forming the outer surface 11a of the roller 11 on a surface having wear resistance and corrosion resistance, plating treatment is performed to make the outer surface N
It may be formed of i, Cr or an alloy layer containing them, or may be ion-nitrided to form Fe on the outer surface.
It can also be formed with a compound layer based on 2-3N or Fe4N.

Further, the seats 11d at both ends of the roller 11 are provided.
A coating 17 of fluorine-based resin is formed on the surface (shown in FIG. 8). With this fluorine resin coating 17,
When the roller 11 and the ball 12 are rubbed, the receiving seat 11d
It is possible to improve the lubricity of the portion in contact with the ball 12 and reduce the wear of the receiving seat 11d. A plating layer (not shown) may be formed on the surface of the seat 11d.

Next, the manufacturing process of the roller 11 will be briefly described. The roller 11 is made of stainless steel by drawing or extruding stainless steel and has an outer diameter of 0.
A pipe material having a length of 95 mm and an inner diameter of 0.6 mm and a length of 600 mm was used. The stainless steel pipe material has the advantages that even small items can be obtained with relatively high dimensional accuracy at low cost, and it is also excellent in rust prevention. In addition, as post-processing, in order to make the surface roughness of the outer surface 11a of the roller 11 as fine as possible, the material 11b of the roller 11 may be previously subjected to processing such as chemical polishing, lapping, or buffing.

Conventionally, the roller 11 is usually manufactured by cutting a rod material, but the roller 11 is small in size, and particularly in the case of stainless steel, the tool is broken and the tool is broken. It was easy and not suitable for mass production. For this reason, it was decided to use a pipe material that can be easily purchased because it is suitable for mass production, the manufacturing cost can be reduced, and the product can be supplied at a low price. In addition to stainless steel, bearing steel or carbon steel, or metallic material such as nickel silver, brass, aluminum alloy or the like may be used, and resin material or the like may be used regardless of the metallic material. .

Next, a TiN coating 16 is formed on the outer surface 11a of the material 11b by chemical vapor deposition to a thickness of 3 μm. After this, the pipe material is cut into a predetermined length of 3 mm. At the time of cutting, the TiN coating film 16 formed on the surface of the pipe material serves as a reinforcing material to minimize the occurrence of burrs and burrs on the pipe material. You can Then, a seat 11d that abuts the balls 12 on both ends of the cut roller 11 having a total length of 3 mm
To cut. At this time, as an advantage of the pipe material in processing, when attaching the roller 11 to a machine tool or the like,
The centering in the axial direction can be easily performed, and even if the seat 11d is cut because the material is hollow, it is not necessary to cut the center part, which is a difficult process, so it can be processed in a short time. The machined surface can be finished neatly. When the TiN coating film 16 is formed on the roller 11 in the previous step, it has an effect of preventing damages such as scratches on the outer surface 11a of the roller at the time of handling in the post processing or at the assembly step.

Next, on the surface of the receiving seats 11d formed on both ends of the roller 11, in order to reduce unlubrication and wear of the portion contacting the balls 12, a fluorine resin coating 17 is formed.
To 3 μm. A plating layer may be formed on the surface in addition to forming the fluororesin film 17. Finally, in order to make the roller surface 11c a mirror finish, it is polished and finished with diamond powder. In order to improve the affinity with the ink 15 without making the roller surface 11c a mirror finish, the roller surface 11c is
You may make it a satin-finished surface within the range which does not prevent the rotation of.

Here, the basic operation of the writing tool or applicator roller of the embodiment of the present invention will be described.
In the writing tool B in which the tip 10 in which the roller 11 finished in the above manufacturing process is incorporated in the tip holder 13 is fixed to the barrel body 14, when the tip of the tip 10 is moved downward during writing, the ink 15 is ejected. The ink flows into the holder 13, and the roller holding chamber 13 a is filled with the ink 15. At the time of writing, hold a writing shaft (not shown) by hand and first press the roller 11 against the paper surface, the roller 11 is displaced in the tip holder 13 against the elastic force of the spring 18 and hits the seat portion 13c. Contact. If the roller 11 is moved while rotating in this state, the roller holding chamber 13
The ink 15 of a is transferred from the roller surface 11c to the paper surface, and a desired thick line can be drawn. When drawing a thin line on the paper, press the ball 12 against the paper,
The ball 12 is rotated to transfer the ink 15 onto the paper surface.
When not writing, when the roller 11 or the ball 12 is separated from the paper surface, the elasticity of the spring 18 provided in the chip holder 13 causes the roller 11 and the ball 12 to come into contact with the inner surface of the tip portion 13b of the chip holder 13 to be in a close contact state. It prevents the ink from drying and leaking.

In order to confirm the effect of the roller for a writing implement or an applicator of the present invention, a long-distance writing performance was tried on concrete having hardness as a writing surface, but the lubricity was always maintained on concrete. I was able to draw thick and thin lines without problems. Further, when the roller surface 2c of the roller 2 was observed, no damage such as abrasion or scratches occurred.

In the roller for a writing instrument or an applicator of the present invention, since the TiN coating film 16 is formed on the outer surface 11a of the roller 11, the roller 11 is used as the tip holder 13.
When rotating while abutting on the inner seat portion 13c or the inner surface of the tip portion 13b of the tip holder 13, the roller 11 always rotates smoothly because the resistance due to friction is small, and there is no light or shade on the handwriting or application surface. You can get things.

[0039]

The present invention comprises a method as in the above-described embodiment of the present invention. According to the roller for a writing instrument or an applicator according to the present invention, the outer surface of the roller has abrasion resistance and corrosion resistance. By forming a film having such a property, it is possible to minimize the abrasion of the outer surface regardless of the material of the roller and prevent the corrosion due to the ink and the coating liquid. That is, damage to the roller is reduced, lubricity is maintained even during long-distance writing or long application, the roller always rotates smoothly, and a writing instrument or applicator roller that does not have light or shade on the handwriting or application surface is used. Can be provided. In addition, a roller having high productivity in the processing and suitable for mass production can be manufactured.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a tip portion of a writing instrument or applicator roller according to the present invention.

FIG. 2 is a cross-sectional arrow view of a II line portion in FIG.

FIG. 3 is a cross-sectional view of a roller portion of a writing instrument or applicator roller according to the present invention.

FIG. 4 is a schematic cross-sectional view of a tip portion of another writing instrument or applicator roller according to the present invention.

FIG. 5 is an enlarged schematic cross-sectional view showing a state where balls are in contact with both ends of a roller.

FIG. 6 is an explanatory top view of the tip portion showing a state where balls are held in contact with both ends of the roller and are rotatably held by the tip holder.

FIG. 7 is a sectional view of a roller of another writing instrument or applicator roller according to the present invention.

FIG. 8 is a perspective view showing a state in which a coating film of a fluororesin is formed on the surfaces of the seats at both ends of the roller.

[Explanation of symbols]

 A Writing tool 1 Tip 2 Roller 2a Outer surface 2b Material 2c Roller surface 2d End face 3 Chip holder 3a Roller holding chamber 3b Tip part 3c Seat part 4 Shaft cylinder body 4a Opening part 5 Ink 6 TiN coating B Writing tool 10 Chip 11 Roller 11a Outer surface 11b Material 11c Roller surface 11d Seat 11e Ridge 12 Ball 13 Chip holder 13a Roller holding chamber 13b Tip part 13c Seat 14 Shaft cylinder body 14a Opening part 15 Ink 16 TiN coating 17 Fluorine resin thin film 18 Spring

Claims (8)

[Claims] 1. A barrel body that contains a liquid such as ink or a coating liquid and has a tubular release portion, a tip fixed to the release portion of the barrel body, and at least inside the tip. A part of which protrudes outward and is rotatably held, and a liquid such as the ink or the coating liquid is transmitted to the roller to rotate and / or displace the roller for writing or In the writing implement or applicator for applying, the roller has a surface treatment on its outer surface, which is a roller for a writing implement or applicator. 2. A shaft cylinder main body having a cylindrical opening part and containing a liquid such as ink or a coating liquid, a chip fixed to the opening part of the shaft cylinder main body, and a chip inside the chip. A roller whose part protrudes outward and is rotatably held,
And a ball which is in contact with an outer end of the roller and is rotatably held by a part of the roller protruding outward, and the liquid such as the ink or the coating liquid is applied to the roller and / or the roller. In a writing tool or an applicator for writing or applying by transmitting to a ball and / or rotating and / or displacing the roller and / or the ball, the outer surface of the roller is surface-treated. Or roller for applicator. 3. The outer surface of the roller is made of Ti, V, C
The roller for a writing instrument or an applicator according to claim 1 or 2, further comprising a coating layer made of at least one or more carbides, nitrides or solid solutions of r metal. 4. The roller for a writing instrument or an applicator according to claim 1, wherein the outer surface of the roller is formed of an alloy layer containing Ni, Cr or a metal thereof. 5. The outer surface of the roller is Fe2-3N
Alternatively, the writing or applicator roller according to claim 1 or 2, which is formed of a compound layer based on Fe4N. 6. The roller is formed of a pipe-shaped hollow body, and a tapered seat is formed at the end of the roller for contacting the ball with the outer end of the roller. The roller for a writing instrument or an applicator according to claim 2. 7. The roller for a writing instrument or an applicator according to claim 2, wherein the ridgeline formed by the outer surface of the roller and the seat is formed to have a sharp edge. 8. The seat is formed with a coating or plating layer of a fluororesin on the surface of the seat.
Or a roller for a writing instrument or an applicator according to item 6.