JPH05112097A - Writing roll of paper moving type plotter - Google Patents

Abstract

PURPOSE:To restrain static electricity from being generated between paper and a writing roll by a method wherein frictional coefficient of a surface of the writing roll is decreased during operating with a paper moving type plotter. CONSTITUTION:An anodic oxidation film 15 is formed by anodic oxidation treatment on a surface of a writing roll body 14' formed of aluminum or aluminum alloy. Further, a molybdenum disulfide later 16 is laminated by electrodeposition on its surface and besides holes 17 formed in the anodic oxidation film 15 are filled with molybdenum disulfide 16'. Since the holes formed in the anodic oxidation film are filled with molybdenum disulfide connected to the molybdenum disulfide layer thereby the molybdenum disulfide layer is difficult to be peeled off from the anodic oxidation film. Therefore, restraining effect from static electricity on the surface of the writing roll is kept for a long time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing roll disposed so as to face a pen tip of a pen, particularly in a paper move type plotter.

[0002]

2. Description of the Related Art Conventionally, a paper move type plotter 1 as shown in FIGS. 3 and 4, for example, is known as an apparatus capable of automatically drawing on a sheet by computer control.

This paper move type plotter 1 basically comprises a guide rail 3 installed between support bases 2 and 2,
A pen 5 held by a pen carriage 4 that moves on the guide rail 3, and a strip-shaped hard rubber that is provided so as to face the pen tip of the pen 5 and serves as an underlay when the pen 5 draws on the paper 6. A writing board 8 in which 7 is embedded,
A pinch roll 9 and a grit roll 10 for sandwiching the paper 6 and for moving the paper 6 forward and backward, an apron 11, 11 for moving the paper 6 forward and backward on its upper surface, and a writing plate 8 adjacent to the apron 11, 11. The support plate 12 and the like are interposed therebetween. The grit roll 10 is inserted in a hole 13 provided in the support plate 12. The aprons 11 and 11 are both arcuate in cross section, and the upper end surfaces of the aprons 11 and 11 and the writing plate 8 are formed.
And the upper surface of the support plate 12 are flush with each other.

By the way, a writing plate 8 in which a hard rubber 7 is embedded as an underlay when a drawing is made on a sheet 6 by a pen 5.
Is formed of, for example, a steel plate, and therefore, when the paper 6 is moved back and forth during operation of the plotter 1 as indicated by the arrows in FIGS. 3 and 4, the paper is placed between the paper 6 and the writing plate 8. There is a problem that static electricity is generated due to the friction between 6 and the writing plate 8.

Therefore, the following techniques have been proposed as techniques for preventing static electricity.

(1) An antistatic coating is applied to the surface of the writing plate 8 on which the paper 6 is moved back and forth except for the portion where the hard rubber 7 is embedded.

(2) A static elimination brush is arranged at a predetermined position on the back surface of the writing plate 8.

[0008]

However, the technique described above has the following problems.

(1) The surface of the writing plate with antistatic coating: Since the surface of the writing plate is rubbed by the paper during the operation of the plotter, the antistatic coating is peeled off and the antistatic effect is lost.

(2) A static elimination brush is provided on the back surface of the writing plate: factors such as the charge potential of the paper, the discharge characteristics of the static elimination brush, the moving speed of the paper, and the distance between the paper and the static elimination brush affect the antistatic performance. Since it has a great influence, the antistatic effect is weakened depending on the usage conditions such as paper and static elimination brush.

The present invention has been made in view of the above-mentioned problems, and is used as an underlay when a sheet is drawn with a pen, and paper with reduced static electricity by reducing friction with the sheet. The purpose is to provide a writing roll for a move type plotter.

[0012]

A writing roll of a paper move type plotter of the present invention is a writing roll used as an underlay when a sheet is drawn on a sheet with a pen, and the writing roll main body is aluminum or aluminum alloy. And an anodic oxide film is formed on the surface of the writing roll body, and a molybdenum disulfide layer is further laminated on the surface of the anodic oxide film.

[0013]

In the writing roll of the paper move type plotter of the present invention, the writing roll main body is made of aluminum or an aluminum alloy, an anodic oxide film is formed on the surface of the writing roll main body, and the surface of the anodic oxide film is further formed. Is formed by laminating a molybdenum disulfide layer. The writing roll itself is used as an underlay when the paper is drawn by the pen.

Therefore, since the friction coefficient of the surface of the writing roll is reduced and the contact area with the paper is narrower than that of the conventional writing plate described above, when the paper is moved back and forth on the surface of the writing roll. It is possible to suppress the generation of static electricity between the writing roll and the paper.

Further, since the surface of the writing roll is coated with molybdenum disulfide to increase the hardness of the surface of the writing roll, it is possible to draw on a sheet using a pen that requires high writing pressure. it can. Further, in the conventional writing plate, the pen is reciprocated only at a certain position on the hard rubber, so that the hard rubber as the underlay is easily worn away, whereas in the writing roll of the present invention, the entire writing roll surface is Since it functions as an underlay, abrasion of the surface of the writing roll is suppressed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the writing roll 14 of the paper move type plotter according to the present invention has an anodized film 15 formed on the surface of a cylindrical writing roll body 14 'made of aluminum or aluminum alloy. Was
In addition, molybdenum disulfide (M
The oS ₂ ) layer 16 is laminated.

Here, the writing roll 14 is formed as follows.

First, the surface of a cylindrical writing roll body 14 'formed of aluminum or an aluminum alloy is subjected to anodizing treatment, so that an anodized film 15 is formed on the surface of the writing roll body 14'. To be done. The thickness of the anodic oxide film 15 is about 30 μm, and innumerable holes 17 are formed in the anodic oxide film 15 during the formation process. Here, the thickness of the anodic oxide coating 15 is not limited to the above thickness, but the thickness of the anodic oxide coating 15 becomes thicker (for example, 100 microns or more).
Since the holes 17 may be closed in the vicinity of the surface of the anodic oxide coating 15, it is desirable that the thickness of the anodic oxide coating 15 be such that the holes 17 are not closed.

By the way, as the anodizing treatment for forming the anodized film 15 on the surface of the writing roll body 14 ', the following techniques are known, for example.

Direct current electrolysis of 3 A / dm ² is performed with the object to be treated immersed in a mixed acid bath in which a 15 wt% sulfuric acid aqueous solution and a 3 wt% oxalic acid aqueous solution are mixed at a predetermined ratio.

Next, a molybdenum disulfide layer 16 is laminated on the surface of the anodic oxide film 15 formed on the surface of the writing roll body 14 'by electrodeposition. At this time, the anodized film 15
The holes 17 formed in the above are also filled with molybdenum disulfide 16 ′ continuous with the molybdenum disulfide layer 16.

By the way, as a technique for laminating the molybdenum disulfide layer 16 on the surface of the anodized film 15 formed on the surface of the writing roll body 14 'by electrodeposition, for example, the following technique is known.

In an aqueous solution of 3% by weight of ammonium thiomolybdate (MoS ₄ (NH ₄ ) ₂ ), an object to be treated having an anodized film formed on its surface was used as an anode, and a stainless steel plate was used as a cathode, for example. 50mA / by current method
Perform electrolysis of dm ² .

The writing roll 14 is arranged in the paper move type plotter 18 as follows. In FIG. 2, the same parts as those of the paper move type plotter 1 described above are designated by the same reference numerals.

The writing roll 14 is disposed vertically below the pen 5 with a predetermined distance from the pen tip of the pen 5, and the paper 6 is moved back and forth between the writing roll 14 and the pen 5. At this time, the writing roll 14 is arranged so that the pen tip of the pen 5 is located above the uppermost point of the surface of the writing roll 14. The writing roll 14 is rotationally driven in synchronization with the grit roll 10 by a driving device (not shown).

Since the surface of the writing roll 14 thus constructed is covered with the molybdenum disulfide layer 16, the friction coefficient of the surface of the writing roll 14 is extremely small. Since the writing roll 14 is rotationally driven in synchronization with the grit roll 10, the writing roll 14 is rotated in synchronization with the advancing / retreating of the paper 6 by the grit roll 10. Therefore, it is possible to efficiently suppress the friction between the writing roll 14 and the paper 6.

The holes 17 formed in the anodic oxide film 15 formed on the surface of the writing roll body 14 'reach the surface of the writing roll body 14', but the holes 17 are filled with molybdenum disulfide 16 '. Therefore, the portion of the surface of the writing roll body 14 'in contact with the hole 17 is protected by the molybdenum disulfide 16'.

Although the writing roll main body has been described as having a cylindrical shape in the above embodiment, it may have a cylindrical shape.

Here, the writing roll 14 of the present invention and the writing plate 8 made of a steel plate on the surface of which an antistatic paint (for example, Atom Chemical Paint Co., Ltd .; Non-Statex P) is applied are each a paper move type plotter (for example, It was arranged on Roland DG, GRX-400), and the generation of static electricity was compared when the same drawing operation was repeated 2000 times on the tracing paper using these plotters. The writing roll 14 of No. 2 had a lesser generation of static electricity. Further, when the surface of the writing roll 14 of the present invention at this time and the surface of the conventional writing plate 8 made of a steel plate coated with an antistatic coating on the surface are observed in detail, the surface of the writing roll 14 of the present invention is observed. No portion where the molybdenum disulfide layer 16 was peeled off was observed, but a portion where the antistatic coating was peeled off was observed at several tens of locations on the surface of the conventional writing plate 8.

The reason for this is that since the surface of the writing roll 14 is covered with the molybdenum disulfide layer 16, the friction coefficient of the surface of the writing roll 14 is reduced and the writing roll 14 is provided as an underlay. It is considered that the contact area between the writing roll 14 and the paper 6 which is the underlay when the paper 6 is drawn by 5 is narrower than that of the conventional writing plate 8 described above. Further, in the conventional writing plate 8, the adhesion between the writing plate 8 made of a steel plate and the antistatic coating is insufficient, so that the adhesion between the writing plate 8 made of a steel plate and the antistatic coating is insufficient. In the writing roll 14 of the present invention, the molybdenum disulfide layer 16 ′ that is continuous with the molybdenum disulfide layer 16 has holes 17 while the frictional force of the tracing paper could not be endured.
It is considered that the molybdenum disulfide layer 16 is firmly fixed to the anodized film 15 by being filled up to the innermost part of the.

[0032]

According to the present invention configured as described above, static electricity is generated between the paper and the writing roll when the paper is moved back and forth while the paper move type plotter is operating. Can be suppressed.

Further, since the molybdenum disulfide layer is firmly adhered to the surface of the writing roll body through the anodized film, the molybdenum disulfide layer is less likely to be peeled off from the writing roll surface. The antistatic effect is maintained for a long time. Furthermore, since the hardness of the surface of the writing roll is increased by the molybdenum disulfide layer that covers the surface of the writing roll, when writing on the paper with a pen that requires high writing pressure, such as a pencil, The paper is not pressed by the writing pressure into the surface of the writing roll, and as a result, the same convex portion as the pen's handwriting is not formed on the back surface of the paper. Therefore, it is possible to suppress the generation of static electricity between the paper and the support plate, the apron, etc. due to friction between the convex portion and the support plate, the apron, etc.

[Brief description of drawings]

FIG. 1 is a layer configuration diagram of a writing roll of a paper move type plotter according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view in the vicinity of a writing roll of the paper move type plotter.

FIG. 3 is a perspective view of a paper move type plotter.

FIG. 4 is a schematic sectional view in the vicinity of a writing plate of a conventional paper move type plotter.

[Explanation of symbols]

 1 Plotter 5 Pen 6 Paper 14 Writing Roll 14 'Writing Roll Main Body 15 Anodized Film 16 Molybdenum Disulfide Layer

Claims (1)

[Claims] 1. A writing roll used as an underlay of the paper when drawing is performed on the paper with a pen, the writing roll main body being formed of aluminum or an aluminum alloy, and the surface of the writing roll main body. A writing roll for a paper move type plotter, wherein an anodized film is formed, and a molybdenum disulfide layer is further laminated on the surface of the anodized film.