JPS59196300A - Plotter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a plotter.

[Prior art]

Conventional blocks include a flatbed type in which paper is fixed on a flat surface and a writing instrument moves two-dimensionally on the plane to create a drawing, and a flatbed type in which the paper is moved in one direction and the writing instrument is moved in a direction perpendicular to the direction of movement. However, the former flatbed type has drawbacks such as occupying a large area, requiring a large-scale device and increasing costs, having a disadvantage in the rigidity of positioning the writing instrument, and not being suitable for high-speed drawing. Therefore, in recent years, many types of plotters with moving paper have been developed. For a type of block in which the paper moves, the paper is fixed to a part such as a drum or belt so that there is no relative positional shift with the part such as the drum or belt, and the part such as the drum or belt is rotated or moved. By doing so,
The paper is held between a device that moves the paper, a roller with a rough surface formed on the surface, and a presser roller that is pressed against the roller,
There is one in which the paper is moved by rotating the rough surface roller. Regarding the former drum or belt type, it is necessary to rotate or move a drum or belt with a large diameter to move the paper, so the inertia of the movement system for moving the paper is extremely large. It has its drawbacks. Furthermore, it requires fixing parts or sprockets to determine the relative position of the drum or belt, etc. and the paper, and it has a number of disadvantages, such as making the operation of attaching and removing the paper cumbersome. . Next, regarding the latter type of rough surface roller type, since it is not preferable to form impressions due to the rough surface in the drawing area in the center of the paper, the paper is held only at both ends in the width direction. Therefore, due to the frictional force between the writing instrument and the paper caused by the writing pressure of the memorization instrument and the frictional force between the paper and the platen, the central part cannot follow the feeding of the paper in the gripping part, and the paper Wrinkling, lifting, meandering, etc. occur, and as a result, the reproducibility of paper feeding is lost. In order to prevent this, the shape of the platen or the shape of the presser roller is devised to generate tension in the width direction of the paper, but as a result, the shape of the parts becomes complicated and costs increase. Furthermore, even when tension is generated as described above, it can only be used with writing instruments that require light pressure, such as fiber pens, and is less effective against writing instruments that require high pressure, such as ballpoint pens or mechanical pencils. Therefore, it has various drawbacks, such as a large restriction on the types of writing implements that can be used. As mentioned above, all types of conventional plotters have their own drawbacks in the pen-based plotting function itself.

[Purpose of the invention]

In order to eliminate the above-mentioned drawbacks, the present invention uses two rollers: a driving roller for reciprocating the paper and a drawing roller that serves as a cradle for the marker, thereby reducing inertia and facilitating operation. The purpose of this is to allow the use of writing instruments with high writing pressure, such as mechanical pencils.

[Structure of the invention]

The present invention will be explained in detail below with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a paper driving roller, the surface of which is processed to have irregular irregularities by, for example, thermal spraying of metal.

The rough surface has such roughness and density that the paper can be fed without slipping, and the method for forming the rough surface is not limited to thermal spraying, but may be any other chemical or mechanical method. Furthermore, the range of the surface roughening described above does not need to cover the entire surface of the roller, but may be applied to at least the entire circumference of the portion facing the presser roller 2, which will be described below. Reference numeral 2 denotes a presser roller, which is pressed against the driving roller 1 via the paper 3 at both ends of the drawing paper O.

Therefore, the paper 3 is held between the drive roller 1 and the presser roller 2. Reference numeral 4 denotes a drawing roller arranged parallel to the drive roller 1, and its surface is treated to have a rough surface with relatively fine irregularities to the extent that it does not leave impressions on the paper 6 even when pressed by a writing instrument 5, which will be described below. . Although any method may be used to form this rough surface, it is necessary to cover the entire area overlapping the paper 3. Reference numeral 5 denotes a writing instrument, which is held by a pen carriage (not shown) that can reciprocate in the width direction of the paper 6 and can move up and down in the vertical direction with respect to the paper 3. Therefore, the explanation will be omitted. 6 and 7 are gears for driving the drive roller 1 and the drawing roller 4, respectively; 8 is a motor for driving the gears 6 and 7; a pinion gear 8b is provided at the tip of the shaft 8α; It meshes with both of 7. Further, reference numerals 9 and 10 indicate platens for receiving the paper 3, which are arranged at positions such that their surfaces are in contact with the drive roller 1 and the drawing roller 4.

[For production]

Next, the operation will be explained. The rotation of the motor 8 causes the drive roller 1 and the drawing roller 4 to rotate via the gears 6 and 7. Since the presser foot 22 is pressed through the paper 3, the drive roller 1 is on the back side of the paper 6 (on the drive roller side).
An indentation is formed by the convex portion. Therefore, the rotation of the drive reeler 1 reliably transports the paper 3 without slipping.

When the motor 8 is rotated in the opposite direction, the drive roller 1 is also rotated in the opposite direction, and the impressions already formed on the paper 3 and the protrusions of the drive roller 21 that formed the impressions correspond to the combination at the time of forming the impressions. The paper 3 is fed in a one-to-one manner without slipping.

Therefore, even if feeding is repeated in the forward and reverse directions, the feeding position of the paper 6 relative to the rotation of the drive roller 1 is completely reproducible. When the writing instrument 5 is in the up position and is away from the paper 3, there is no load on the paper 3, so the paper 3 is fed normally. Next, when the writing instrument 5 is in the down state, the writing instrument 5 is pressing the drawing roller 4 through the paper 3. For this reason, a frictional force acts between the writing instrument 5 and the paper 3 in the direction opposite to the paper feeding direction, but on the other hand, relatively fine unevenness is formed on the surface of the drawing roller 4. Since it is rotated by the motor 8 in synchronization with the drive roller 21, a large frictional force acts between the paper 3 and the drawing roller 4. Moreover, since the direction of this frictional force is the same as the paper feeding direction and cancels out the frictional force received from the writing instrument 5, the paper 3 is fed accurately and reproducibly without wrinkles or floating.

Next, although not shown, as a second embodiment according to the present invention,
The surface of the drawing roller 4 is not subjected to any special roughening treatment, but is left with a normal finished surface, and the number of teeth of the gear 7 attached to the drawing roller 4 is made smaller than the number of teeth of the gear B attached to the drive row 21. There are possible cases. To explain the operation, the motor 8 drives the gears 6 and 7 through the pinion gear 8a at the tip.
is driven, but since the gear 7 has fewer teeth than the gear 6, the rotation speed of the gear 7 is higher than that of the gear 6. Therefore, if the outer diameter of the drive roller 1 and the outer diameter of the drawing roller 4 are the same,
The drawing roller 4 has a higher outer circumferential speed than the drive roller 1. On the other hand, since the moving speed of the paper 3 and the outer circumferential speed of the drive roller 1 are the same, the outer circumferential speed of the drawing roller 4 is faster than the moving speed of the paper 3. When the writing instrument 5 is pressed against the paper B in this state, a frictional force acts between the writing instrument 5 and the paper 3, and at the same time, a frictional force also acts between the paper 3 and the drawing roller, and the direction is opposite. direction. Therefore, regarding the paper 3, the frictional force received from the writing instrument 5 and the frictional force received from the drawing roller 4 cancel each other out, and the same effect as in the embodiment shown in FIGS. 1 and 2 is obtained. This also has the effect of reducing costs (this is because roughening the surface of the drawing row 24 is not required). Similarly, although not shown, in the second embodiment, the gears 6 and 7 are the same, and the drawing roller 4
Needless to say, even if the outer diameter of the drawing roller 1 is made larger than the outer diameter of the drive roller 1, a speed change occurs between the paper 3 and the outer periphery of the drawing roller 4, and the same effect can be obtained. Further, in this embodiment, the drawing roller 4 and the driving roller 1 are driven by gears 6 and 7, but it goes without saying that the same effect can be obtained by replacing them with any driving system such as a belt or the like.

In the embodiment according to the present invention, as described above, a sufficient effect can be obtained when the writing pressure of the writing instrument 5 is applied.
When no pen pressure is applied, or even when pen pressure is applied, there are no wrinkles or lifting due to the load on the paper at a considerable distance from the point of application, but lifting occurs in the color tube due to high-speed movement. Although there is a possibility that this may occur, there is a possibility that the platen should be removed near roller 1.4. , 10, or by arranging a presser plate for preventing the paper 3 from floating above the paper 3 so as to be parallel to the platens 9 and 10 at the widthwise end of the paper 3. This will be solved by

〔effect〕

As described above, according to the present invention, there is no need to consider the platen or presser roller to prevent paper from lifting or wrinkling, which is a drawback of the conventional rough roller type, so the shape of the parts is simplified and , since there is no restriction on the writing instrument 5, which is the biggest drawback, it has the great effect of dramatically expanding the range of use. On the other hand, compared to the conventional drum or belt type, because the paper is directly fed, the inertia in the paper feeding interlocking system is only in the two rollers 1 and 4, and furthermore, the rollers 1 and 4 are affected by the pressure applied by the writing instrument 5. The outer diameter can be made quite small as long as it has enough strength to withstand. Therefore, its inertia can be made smaller than that of the conventional large drum or belt type, and as a result, the drive motor and its electrical equipment can be made smaller. In addition, regarding paper setting, since the paper 3 is directly caught between the drive roller 1 and the presser roller 2, there are many advantages such as no special parts are required and the operation is simple.

In summary, the present invention improves the shortcomings of conventional various types of blocks, and makes it possible to significantly improve cost performance by being small, lightweight, low cost, easy to operate, and has no restrictions on writing instruments. It has the effect of becoming

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the invention, and FIG. 2 is a plan view of an embodiment of the invention. 1...Drive roller 2...Press roller 3...Paper 4...Drawing roller 5...Writing instrument 6.7... ...Gear 8...Motor 9.10...Platen and above Applicant Daini Seikosha Co., Ltd. Agent Patent attorney Tsutomu Mogami

Claims (1)

[Scope of Claims] A drawing paper, a drive roller for driving the drawing paper in one direction, and a drive roller configured to move back and forth in a direction perpendicular to the moving direction of the drawing paper, and for drawing on the drawing paper. A block having a writing instrument for use in writing, wherein a rough surface is formed on the surface of the drive roller to prevent slippage between the drive roller and the drawing paper, and a rough surface is formed on the surface of the drive roller to press the drawing paper against the drive roller. At least two or more rollers are provided, a drawing roller is arranged close to the driving roller and parallel to the driving roller, the drawing roller and the driving roller are rotationally driven at the same time, and the drawing roller is rotated at the same time. A block characterized in that the block is configured to draw by pressing the writing instrument from above through the drawing paper.