JPH071884A - Processing method for marking roller of marking pen for dot forming - Google Patents

Abstract

PURPOSE:To provide a processing method for a marking roller of a marking pen for dot forming which can form easily the marking roller of the marking pen for dot forming for the purpose of transferring dots out of a cylindrical or a columnar continuous foaming body material by pressing the roller to a transfer surface and rolling thereon. CONSTITUTION:At least two lines of helical channels 8a and 8b to be formed respectively in the reverse direction by heat melting or grinding are processed on an outer peripheral face of a cylindrical continuous foaming body material 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a mark roller which is rotatably held at the tip of a marking pen and is capable of transferring dots by pressing it against a transfer surface and rotating it.

[0002]

2. Description of the Related Art Conventional marking pens have
A line with a predetermined thickness is drawn by bringing it into contact with the paper surface and moving it. When drawing multiple dots, there is no choice but to bring the pen tip into contact with the paper surface for each dot. It was hanging.

In this case, a roller provided with a large number of transfer projections on its outer peripheral surface is used, and the roller is made to contain ink,
Dots can be easily drawn by rolling the roller while bringing the transfer projection of the roller into contact with the paper surface.

However, it is not easy to form such transfer protrusions into an open-cell body which can be impregnated with ink.

That is, the pen tip of the conventional marking pen is made of a thermoplastic resin material such as a polyamide or an olefinic thermoplastic elastomer (in this specification, a thermoplastic elastomer) so that the ink from the ink tank can be impregnated. Is to be included in the thermoplastic resin) to form open cells by the elution method.

For this reason, if the transfer projections are separately attached with an adhesive, the ink cannot be guided into the projections. Further, it is possible to form the projections at the same time when forming the open-cell body, but since the projections that draw dots are small, they cannot be formed by mold molding such as injection molding, and by extrusion molding,
After forming the cylindrical or columnar open-cell material excluding the transfer projection, the transfer projection is formed on the outer peripheral surface of the open-cell material, and the above-mentioned problem occurs.

The present invention is to solve the above-mentioned problems, and a mark forming roller of a dot-forming marking pen capable of transferring dots by pressing it against a transfer surface and rolling it is used as a cylindrical or cylindrical open-cell body. An object of the present invention is to provide a method for processing a mark roller of a marking pen for dot formation which can be easily formed from a material.

[0008]

According to the processing method of the present invention, dots can be transferred by being rotatably held at the tip of a marking pen and pressed against the transfer surface to roll.
A method of processing a mark roller of a dot-forming marking pen, comprising a cylindrical or columnar open-cell material, and a plurality of transfer projections protruding from the outer peripheral surface of the material. It is characterized in that at least two spiral concave grooves formed in mutually opposite directions are formed on the outer peripheral surface of the open-cell body material by heat melting or grinding, and processed.

[0009]

In the processing method according to the present invention, the outer peripheral surface of the open-cell body material is melted by heat or ground,
By forming at least two spiral concave grooves formed in mutually opposite directions, dots can be formed between the pitches of the respective spiral concave grooves and between the concave grooves formed in mutually opposite directions. A plurality of protrusions for transfer will be formed.

Such processing is carried out, for example, by setting the open-cell material on a lathe and rotating it while moving a heated blade edge or a rotating thin disc-shaped grindstone against the outer peripheral surface of the material. Therefore, it becomes possible to easily form a plurality of projections for dot transfer on the outer peripheral surface of the material.

Therefore, in the processing method according to the present invention, the marking roller of the marking pen for dot formation capable of transferring dots by pressing and rolling it onto the transfer surface can be easily formed from a cylindrical or cylindrical open-cell material. Can be formed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The mark roller 6 manufactured in the embodiment is rotatably held at the tip of the dot forming marking pen 1 as shown in FIG.

An ink tank is arranged in the grip portion 2 of the marking pen 1, and a holding rod 3 extending from the grip portion 2 in an L shape is made of a pipe material, and a bent portion 3a is bent.
A large number of through holes 3b are formed and the mark roller 6 is rotatably mounted on the exterior. A stopper 4 is fixed to the tip of the bent portion 3a to prevent the mark roller 6 from coming off. The holding rod 3 holds the mark roller 6 and guides the ink from the ink tank and supplies the ink to the mark roller 6 from the through hole 3b.
Is formed. In addition, 9 is a cap.

The mark roller 6 has a plurality of transfer projections 7 formed on the outer peripheral surface thereof and is continuously formed by elution using a thermoplastic resin such as polyamide or olefinic thermoplastic elastomer or a rubber material such as NBR. It is formed from the open-cell material 10 in which bubbles are formed. Incidentally, the open-cell foam material 10 has a rubber hardness (JIS A) of 25 to 60 Hs, preferably 4 so as to be well compatible with the paper surface when drawing dots and to be able to supply ink well.
It is desirable to set it to 0 to 50 Hs.

The roller 6 has an outer diameter of 6
-20 mm and length is 3-10 mm. Also, the protrusion 7
Has a height of 0.5 to 0.8 mm.

A method of processing the mark roller 6 will be described below. As shown in FIG.
Cylindrical open-cell material 1 with a length of 0 mm and a length of 300 mm
Set 0 on a lathe and rotate it, 120-130 ℃
It is sufficient to move the heated blade edge 11 while pressing it by 0.5 to 0.8 mm to form the groove 8 and form the protrusion 7. The concave groove 8 is formed by forming a predetermined number of concave grooves 8a and 8b formed by rotating the material 10 in the forward and reverse directions.

Thereafter, by removing the processed material 10 from the lathe and cutting it into a predetermined length, the mark roller 6 can be manufactured.

After that, the roller 6 is assembled to the holding rod 3 to manufacture the marking pen 1.

In the roller 6 thus formed, when the open-cell material 10 is formed of a thermoplastic resin or a rubber (such as NBR with PVC added) that forms a film when melted and solidified, Since the surface of the groove 8 is melted and the air bubbles are blocked, and the ink does not evaporate from the surface of the groove 8, it is suitable for the marking pen 1 that uses water-based ink as the ink.

On the other hand, when the open-cell body material 10 is made of a general rubber, the bubbles may not be closed even if the surface of the groove 8 is melted, and therefore, as ink,
It is desirable to use an oil-based ink that is hard to evaporate from the surface of the roller 6.

Further, in the method of processing the roller 6, while the material 10 is set on the lathe and rotated, the disc-shaped thin grindstone is pressed against the outer peripheral surface of the material 10 and moved to thereby form the concave grooves 8a and 8b. Alternatively, a large number of protrusions 7 may be formed. By the way, in the roller 6 in which the protrusion 7 is formed by grinding, bubbles on the surface of the concave groove 8 are not blocked, and therefore it is desirable to use oil-based ink that is hard to evaporate from the surface of the roller 6 as ink.

If a large number of recessed grooves 8a and 8b are formed, the transferred shape of the protrusion 7 will be close to a circular shape.
With each strip, even if the pitch is reduced, it becomes closer to an ellipse (close to a rhombus).

When the marking roller 6 thus formed is assembled to manufacture the marking pen 1, if the roller 6 is pressed against the surface of the paper and rolled, as shown in FIG. A large number of dots are transferred by the protrusion 7 within the width.

Therefore, in the working method of the embodiment, at least two spiral grooves 8a and 8b which are formed in opposite directions are formed on the outer peripheral surface of the open-cell material 10 by heat melting or grinding. If so, each spiral groove 8
Plural projections 7 for dot transfer are formed between the respective pitches of the groove a and the concave groove 8b and between the concave grooves 8a and 8b which are formed in the mutually opposite directions. The mark roller 6 can be formed from the open-cell material 10.

In the example, the open-cell material 10 has a cylindrical shape, but the marking roller 1 is supplied with ink from at least one of the end surfaces of the marking pen 1. If the both end surfaces are rotatably held, the mark roller may be manufactured by processing from a cylindrical open-cell material.

[Brief description of drawings]

FIG. 1 is a diagram showing a marking pen in which a roller processed according to an embodiment of the present invention is used.

FIG. 2 is a diagram showing a processed state of a roller.

FIG. 3 is a diagram showing a state in which dots are drawn when a marking pen is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Marking pen for dot formation, 6 ... Marking roller, 7 ... Transfer protrusion, 8 (8a / 8b) ... Recessed groove, 10 ... Open cell material.

Claims (1)

[Claims] 1. A marking pen, which is rotatably held at the tip thereof, is capable of transferring dots by pressing it against a transfer surface and rolling it, and is made of a cylindrical or cylindrical open-cell material, and the open-cell material. A method for processing a mark roller of a dot-forming marking pen in which a large number of projections for transfer are projected on the outer peripheral surface of the continuous foam material, wherein 1. A method for processing a mark roller of a marking pen for dot formation, which comprises processing by forming at least two spiral concave grooves formed in a direction.