JPH0226799A - X-y plotter - Google Patents

Abstract

PURPOSE:To accurately perform the positioning of paper without deforming the paper when the paper is pressed to a paper stopper by restricting the paper in the gap between a bed and the paper stopper. CONSTITUTION:A pen 1 and a pinch roller 3 are moved upwardly when paper is mounted. At this time, the L-shape paper stopper 5 mounted to the extension part of a pinch roller support member 8 falls to form a slight gap between the surface 5a parallel to a bed 6 of said stopper and the bed 6. At this time, the surface 5b in the direction vertical to the bed 6 of the leading end of the paper stopper 5 falls bellow the upper surface of the bed 6 at the end part of the bed 6. In this state, paper 2 is inserted from the left to the right along the upper surface of the bed 6. The paper 2 passes through the gaps between the pen 1, the pinch roller 3 and the bed 6 and further passes through the slight gap between the paper stopper 5 and the bed 6, and is inserted up to the L-shape end surface 5b of the stopper 5 to be mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an X-Y plotter, and more particularly to a paper moving type X-Y plotter.

[Conventional technology]

An X-Y plotter is a device that draws a predetermined drawing on a sheet of paper by moving a pen relative to the sheet of paper in the X direction, Y direction, and direction in which these directions are combined. XY plotters can be roughly divided into two types depending on the relative movement method between the pen and the paper: flatbed types that fix the paper and move the pen in the X and Y directions, and flatbed types that move the pen only in one direction, the X or Y directions. There is a paper moving type in which the paper is moved in a direction perpendicular to this. The present invention relates to a paper positioning method for a paper moving type X-Y plotter. X-
Since the Y plotter draws a predetermined plot at a predetermined position on a sheet of paper, the positional relationship between the pen and the sheet must be accurately determined. (Generally, plotting commands and data to the plotter are given from a host computer.) When the paper is attached to the X-Y plotter before plotting, there are generally two methods to determine the position of the paper relative to the pen. is used. One is a method based on paper position detection. In this method, the paper is moved, an optical sensor is used to detect the edge of the paper, and the position is corrected using these coordinates. The other method uses a mechanical stopper, in which the edge of the paper is pressed against a stopper provided on the plotter when the paper is installed to determine its position relative to the pen. Compared to the method using paper position detection, the method using a mechanical stopper is less expensive because it does not require a sensor for detecting the paper position or a position correction calculation function.

(It has the advantage of being highly reliable.

FIG. 3 schematically shows a method for positioning paper using a mechanical stopper in a conventional X-Y plotter.

In the figure, numeral 1 is attached to the plotter so that it can be moved in the Y direction with a pen. (The pen mounting structure is not shown.) 2 is a sheet of paper, which is movable in the X direction. In order to move the paper 2 in the X direction, the paper 2 is held between two pairs of pinch rollers 3 and a friction roller 4 under pressure, and the friction roller 4 is rotated. A paper stopper 5 protrudes from the bed 6. The pen 1, the pinch roller 3, and the paper stopper 5 are all movable in the vertical direction, and are moved upward when the paper 2 is attached to the plotter (the state shown in FIG. 3).

The paper is inserted and positioned along the bed 6 until its end surface touches the paper stopper S. The position of the paper 2 in the Y direction is determined by pressing it against the guide 7. During drawing, the stopper 5 is lowered below the bed 2 so as not to obstruct the movement of the paper 2, and the pinch roller 3 and pen 1 are also lowered and pressed against the paper 2.

[Problem to be solved by the invention]

However, this positioning structure has the following problems. That is, sheets of various properties are used as the paper 2, and some of these are soft and have no stiffness. When such paper is used as the paper 2, the paper 2 may be deformed when pressed against the stopper 5 as shown in FIG. 4, making it impossible to perform accurate positioning.

The purpose of the present invention is to solve the problems of the prior art,
It is an object of the present invention to provide a method for positioning paper using a mechanical stopper that allows accurate positioning regardless of the properties of the paper 2.

[Means to solve the problem]

The above object is achieved by installing a paper stopper on a bed and positioning the paper with the paper sandwiched between the paper stopper and the bed.

[Effect]

When installing the paper, the paper stopper sometimes descends directly above the bed.
Create a narrow space between the bed and the bed. The paper is inserted between the bed and the paper stopper and is pressed against the bed while being restrained in the vertical direction, so that accurate positioning is possible without deformation.

〔Example〕

Hereinafter, one embodiment of the present invention will be explained with reference to FIG. 1, FIG. 5, and FIG. In FIGS. 1 and 2, the same numbers as in FIG. 3 indicate parts with the same product names.

FIG. 1 shows the time when paper is loaded. The pinch roller 3 is rotatably supported by a pinch roller support member 8, and the pinch roller support member 8 is supported by the frame 9 so as to be rotatable about a center 88.

A paper stopper 5 is attached to an extension of the pinch roller support member 8 and integrally with the pinch roller support member. The paper stopper 5 has an L-shaped tip. Next, the operation of this mechanism will be explained. When paper is attached, the pen 1 is sometimes moved upward. The pinch roller 3 is a pinch roller support member 8
Since an external force is applied clockwise around the support portion 8a (the structure for applying the external force is not shown), it moves upward.

At this time, the L-shaped paper stopper 5 attached to the extension of the pinch roller support member 8 is lowered, and a small gap is formed between the surface 5a parallel to the bed and the bed 6. Furthermore, at this time, the surface 5b of the tip of the paper stopper 5 in the direction perpendicular to the bed 6 has descended to below the upper surface of the bed 6 at the end of the bed 6, as shown in FIG. When installing the paper in such a state, the paper 2 is inserted from the left side to the right side in FIG. 1 along the top surface of the bed. paper 2
passes through the gap between the pen 1, the pinch roller 3 and the bed 6,
Further, the paper is inserted through a slight gap between the paper stopper 5 and the bed 6 until it hits the L-shaped end surface 5b of the paper stopper 5, and then stopped. At this time, since there is only a small gap between the paper stopper 5 and the bed 6, the paper 2 is restrained by the paper stopper 5 and the bed 6 and cannot be deformed. Therefore, the deformation of the paper that occurs when the paper is pressed against the paper stopper, which was a problem in the prior art, is eliminated, and it becomes possible to accurately position the paper.

FIG. 2 shows the state of the X-Y plotter when plotting.

The pen 1 and the pinch roller 3 descend to pinch the paper 2 between them and the bed 6. At this time, the paper stopper 5 is raised so as not to obstruct the movement of the paper 2.

〔Effect of the invention〕

According to the present invention, the paper can be restrained in the gap between the bed and the paper stopper, so that when the paper is pressed against the paper stopper, no deformation occurs and the paper can be accurately positioned.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the X-Y plotter of the present invention when paper is attached, Fig. 2 is a side view when plotting, Fig. 3 is a diagram showing a conventional X-Y plotter, and Fig. 4 is a diagram showing the state when paper is attached. FIG. 7 is a side view of a state in which the paper is deformed by being pressed against the paper stopper. 1.Pen, 2.Paper, 3.Pinch roller, 4.Friction roller, 5.Paper base 1-brim, 6.Blank funeral map

Claims (1)

[Claims] 1. In an X-Y plotter in which the paper moves in one direction and the pen moves in a direction perpendicular to the paper, a frame body is rotatable to raise and lower the pinch roller that presses the paper against the friction roller. It consists of a pinch roller support member supported by the pinch roller support member, and a substantially L-shaped paper stopper attached to an extension of the pinch roller support member on the opposite side of the pinch roller. An X-Y plotter characterized in that a paper stopper is lowered until there is a slight gap between the paper stopper and the bed.