JPH0622841Y2 - Coordinate reading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a coordinate reading device, more specifically, X
Equipped with axis rail and Y axis rail, this X axis rail or Y
The present invention relates to a so-called gantry type coordinate reading device in which a coordinate index portion is movably attached along an axis rail.

[Prior art and its problems]

In the printing process, the graphic drawn on the original such as block copy and mount is read by the coordinate reading device, and based on this graphic data,
There is work to create a mask for plate making with an automatic drawing machine.

For example, when a rectangle (22), a circle (23), and an ellipse (24) are specified as a mask figure for a document (21) as shown in FIG. 5, how to read each figure with a coordinate reading device The following operation is generally performed.

That is, for the rectangle (22), after designating a rectangular figure code, align the index marks of the coordinate reading device with the three vertices P ₁ , P ₂ , P ₃ , and press the coordinate reading instruction keys in sequence to read each coordinate. For circle (23), the figure code of circle can be indicated, and then the coordinates of three points P ₄ , P ₅ , P ₆ on the circumference can be read in the same manner. For ellipse (24), figure code of ellipse And the coordinates of the vertices P ₇ , P ₈ , P ₉ of the circumscribing rectangle can be read in the same manner.

On the other hand, as a coordinate reading device, a gantry type device is known. This is, for example, as shown in FIG.
The Y-axis rail (1) is movably mounted on the X-axis rail (2),
The reading index portion (4) is movably attached to the Y-axis rail (1), and as a result, the reading index portion (4) is movable in the XY directions on the document placing plate (10). It is a thing. A cross index mark (5) for indicating the point to be read is formed on the reading index portion (4) by printing, engraving, etc.
A keyboard (3) having a graphic code, keys for instructing coordinates reading, etc., and a display counter for displaying the current XY coordinate values is attached to the Y-axis rail (1).

When reading a figure as described above with a coordinate reading device of this type, the point to be input is a real figure in the case of a rectangle, circle, etc., so the cross index mark (5) is placed at that position. It is easy to match, but for the ellipse, since the coordinates of the vertices of the virtual circumscribing rectangle are the target, the cross mark (5)
It is extremely difficult to exactly align with.

For this reason, conventionally, a gauge in which rectangles of various sizes are drawn on a transparent film is used. Select the rectangle that most closely approximates the target ellipse from this gauge,
The method of applying this to the ellipse, determining the position of the vertex, and inputting is used.

However, the coordinate values obtained by such a method are only approximate values, and completely accurate graphic data have not yet been obtained.

[Means for solving problems]

The present invention, which has been made to solve the problems of the prior art as described above, includes an X-axis rail and a Y-axis rail, and a reading index portion is movably attached along the X-axis rail or the Y-axis rail. A gantry type coordinate reading device, wherein the cross-shaped index mark of the reading index portion is configured to be rotatable around its intersection.

[Action]

If the figure to be read contains an ellipse and the ellipse is tilted, the cross-shaped index mark on the reading index section is rotated and tilted so as to match the tilt, so that a so-called hit is taken about the apex of the circumscribing rectangle. It becomes easier and accurate coordinates can be entered.

〔Example〕

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 1 shows a reading index portion (10) of the coordinate reading device according to the present invention.
2 is an enlarged view of FIG. 2, and FIG. 2 is a sectional view taken along line I-I thereof. The configuration of each unit other than the reading index unit (10) may be the same as the configuration of the conventional gantry type.

The reading index portion (10) has a frame body (11) made of a rigid material such as metal or synthetic resin, and a circular transparent body in which a cross index mark (18) is formed on the frame body (11). Indicator plate (1
3) is fitted rotatably around the intersection of the cross mark (5). The index plate (13) has a pair of positioning protrusions (1
5) (15) is projected upward. Also, cross index mark
As the forming method of (18), an appropriate marking method such as printing, engraving, or transfer can be used.

Above the index plate (13) is a transparent cover plate (1
2) is located. This transparent cover plate 12 is a frame
It is fixed to 11 and along the outer periphery of the protrusion (1
Guide grooves (14) and (14) through which the (5) and (15) are inserted are formed.
This guide groove (14) (14) is provided over the range of 90 °, so that the index plate (13) is projected (15) (15).
Is the angle at which the guide groove can move from one end to the other end, that is, 9
It can be rotated 0 °.

Here, a transparent synthetic resin can be applied to the cover plate (12) and the index plate (13), and acrylic, vinyl chloride, polyethylene, polyester, vinyl chloride-vinyl acetate copolymer, etc. should be used as the material. You can

Next, a case where an inclined ellipse on a document is read using such a coordinate reading device will be described.

First, in order to indicate that the input graphic is an ellipse, the ellipse graphic code is designated from the keyboard. Then the third
As shown in the figure, for a sufficiently small ellipse, rotate the index plate (13) using the protrusion (15) so that the cross index mark (18) matches the inclination of the ellipse to be read,
In addition, make sure that the reading mark part (1
By positioning (0), the rectangle 1 circumscribing the ellipse
The intersection of the index mark (18) can be made to coincide with one vertex, and in this state, the coordinates of the vertices of the rectangle can be accurately read by pressing the key for instructing the reading of the coordinates. The same operation can be performed for the other vertices of the rectangle.

Further, for an ellipse having a size such that the cross index mark (18) cannot be circumscribed, the index plate (13) is rotated so that the cross index mark (18) matches the inclination of the ellipse. This eliminates the relative tilt between the ellipse and the index mark, and makes it possible to match the intersection of the cross index mark (18) with the vertex of the circumscribed rectangle with the same feeling as when the ellipse is not tilted. Can be read.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

For example, if the rotation angle of the index plate (13) is 90 ° at the maximum, all the tilt angles can be dealt with, but it is possible to rotate more than that and there is no restriction on the rotation angle.

Further, although the above embodiment discloses the one provided with a cover plate, the presence of this cover plate is not always necessary, and the regulation of the rotation angle of the index plate is also the protrusion (15) as in this embodiment. The configuration may be other than the combination of the guide grooves (14).

Further, although the projection (15) and the guide groove (14) are provided as a pair, respectively, one of them may be omitted.

It is also possible to arrange a transparent plate below the index plate (13), the lower surface of which is in contact with the document.

[Effect of device]

As described above, according to the present invention, since the cross-shaped index mark of the gantry type coordinate reading device is configured to be rotatable around its intersection point, even an inclined ellipse has a circumscribed rectangular shape. The intersection of the cross mark can be accurately aligned with the vertex, and accurate coordinates can be read.

[Brief description of drawings]

FIG. 1 is an enlarged view of a main part of a coordinate reading device according to the present invention, FIG. 2 is a cross-sectional view taken along the line I--I of FIG. 1, FIG. 3 is an explanatory view for inputting an elliptical figure, and FIG. Is an explanatory view of a general coordinate reading device, and FIG. 5 is an explanatory view of a document on which a figure to be read is drawn. 10 …… Reading index part, 13 …… Index plate 18 …… Cross index mark

Claims (1)

[Scope of utility model registration request] 1. A coordinate reading device comprising an X-axis rail and a Y-axis rail, wherein a reading index section is movably mounted along the X-axis rail or the Y-axis rail, wherein a cross index mark of the reading index section is provided. A coordinate reading device that is configured to be rotatable around the intersection.