JP2639702B2 - CAD drafting data input device - Google Patents

Description

The present invention relates to a computer-aided design and drafting system or CA.
The present invention relates to a drafting data input device used for D.

[Conventional technology]

As a CAD drawing coordinate data input device, a combination of a tablet type digitizer and a position indicator such as a stylus pen, a light pen or a cursor is generally used, and each point on the digitizer indicated by the position indicator is used. Is supplied from the digitizer to the control device, and based on the coordinate signal, the control device is configured to control the CRT display device and display a graphic on the display. As a blackboard, an electronic blackboard provided with a scanner is disclosed in JP-A-59-171696.

[Problems to be solved by the invention]

If the display device and the digitizer are configured separately, when drawing a straight line, the straight line is not drawn at the location where both ends of the straight line are designated, that is, on the digitizer, and the designated location is located at another location, that is, the screen of the display device. A straight line is drawn. Therefore, it is not possible to draw a drawing on a drawing board as if drawing directly with a writing instrument on paper.If you are not used to CAD input operation, the input operation will feel uncomfortable and CAD will be difficult to handle. Existed.

Further, the figure drawn on the blackboard is not suitable for CAD input data, and the output of the electronic blackboard cannot be used for CAD input. SUMMARY OF THE INVENTION It is an object of the present invention to easily convert a precision drawing drawn by a free parallel ruler into CAD input data.

[Means to solve the problem]

To achieve the above object, the present invention provides a table 4,
A horizontal rail 8 fixed to the upper edge of the table 4, slidably connected to the horizontal rail 8 at a right angle to the horizontal rail 8, and covering substantially the entire drawing range of the table 4. Vertical rail 12 with a length that can cross
And an operation head 18 movably connected to the vertical rail 12.
And straight rulers 22 and 24 detachably fixed to a ruler mounting plate 20 of the operation head 18;
And a scanner 26 disposed to face the surface.

[Action]

In the above-described configuration, the precise figure drawn on the paper on the table can be converted into electronic data by the scanner 26 by moving the vertical rail 12 across the drawing range of the table 4 and along the horizontal rail 8. Yes, this data is CAD
Can be entered.

〔Example〕

Hereinafter, the configuration of the present invention will be described with reference to embodiments shown in the accompanying drawings.

In FIG. 5, reference numeral 2 denotes a machine base in which a display device of CAD (computer-assisted drawing system) and a magnifying projection mechanism are built, and a plate-shaped transparent digitizer table 4 is supported on the machine frame. A horizontal rail 8 of a rail type free parallel ruler device 6 is fixed to the upper edge of the digitizer table 4, and a vertical rail 12 is perpendicular to the horizontal rail 8 via a horizontal cursor 10. , And are connected so as to be able to move in parallel in the left-right direction in FIG. The tail of the vertical rail 12 is supported on the guide rail 14 via a tail roller so as to be able to run freely. A vertical cursor 16 is slidably connected to one side of the vertical rail 12 via a roller, and an operation head 18 is attached to the vertical cursor 16 via a known double hinge mechanism.
Straight rulers 22, 24 are detachably fixed to the ruler mounting plate 20 of the head 18. On the other side of the vertical rail 12, a scanner 26, that is, a sensor for converting characters, figures, symbols, and the like written on the table 4 into electronic signals is built in.
Is facing the table 4 surface. The arrangement range of the scanner 26 along the longitudinal direction of the vertical rail 12 extends over substantially the entire length of the drawing range on the table 4 in the vertical direction.

Next, the CAD and the enlargement projection mechanism in the machine base 2 will be described.

The digitizer table 4 supported by the machine base 2
Are set to the same dimensions as a normal drafting board, and have a flat surface like the drafting board. When the operator supports one point on the digitizer table with a position support 28 such as a light pen connected to the control device 30 by a cord, the digitizer table 4 is based on a well-known principle. Is output to the control device 30. Reference numeral 32 denotes a screen having substantially the same dimensions as the digitizer table 4, and is disposed close to the back side of the digitizer table 4. 34 is green (Gree
a display device comprising a cathode ray tube for n)
A lens 36, a light valve 38 and a polarizing prism 40 are provided in front of the display surface. The light valve 38
Constitutes a device that converts an image input from one side into a clear image and irradiates it to the other side, and the configuration and principle of the light valve 38 are described in U.S. Patent Nos. 3,372,351 and 4,433,535. Since it is disclosed in detail, a detailed description thereof will be omitted. The light valve 38 converts an image of the display device 34 into a clear image by interaction with the input light from the xenon lamp 42, and converts this image into a polarizing prism 40.
Irradiation. The image projected on the polarizing prism 40 is configured to be enlarged and projected on the screen 32 via a half mirror 44 and a lens 46. 48 is red
A display device comprising a cathode ray tube, a lens 50 and a light valve 52 are provided in front of a display surface of the display device, and the light valve 52 faces the polarizing prism 40. Reference numeral 54 denotes a display device comprising a cathode ray tube for blue, and a lens 56, a reflection mirror 58, and a light valve 60 are disposed in front of a display surface of the display device, and the light valve 60 faces the polarizing prism 40. ing. The lens 3
6, 50, 56 light valves 38, 50, 60, 44 lamp 42, polarizing prism 40, half mirror 44, and reflecting mirror 58 project an image of the display surface of display device 34, 48, 54 onto screen 32 in an enlarged manner. The enlargement ratio of the enlargement / projection mechanism 62 is determined based on the position on the digitizer table 4 and the screen 32 based on the drawing coordinate signal of the position.
The position is set so that the position corresponding to the position in the above projected view matches. The display devices 34, 48, 54 are connected to the control device 30. In the figure, 71 is the control device 30
The encoder converts the movement of the vertical rail 12 along the horizontal rail 8 into a pulse signal, and supplies the pulse signal to the control device 30 as a feedback signal of the movement of the scanner 26. Is what you do.

 Next, the operation of the present embodiment will be described.

The graphic information drawn on the paper on the table 4 using the free parallel ruler 6 turns on the scanner 26 and moves the vertical rails 12 along the surface of the table 4 manually from left to right in FIG. , And the surface of the table 4 is scanned by the scanner 26, whereby the data can be converted into electronic data. This electronic data is input to the control device 30 and stored in the external storage device 64. The graphic data stored in the storage device can be displayed on the table 4 and corrected. In this case, the graphic data is displayed on the display device 34, for example. The image on the display surface of the display device 34 is projected in the direction of the polarizing prism 40 by the light valve 38, and the image of the display device 34 is enlarged and projected on the screen 32 via the polarizing prism 40, the half mirror 44 and the lens 46. The XY coordinate reference of this enlarged projection and the XY coordinate reference of the digitizer table 4 match at 1: 1. An operator operates a command switch of a cursor (not shown) connected to the control device 30 by a code, for example, instructs the control device 30 to issue a green linear command, and two points on the digitizer table 4 at the tip of the position indicator 28. When A and B are designated, the drawing coordinate signals of points A and B are input to the control device 30. The control device 30 controls the display device 34 based on the input coordinate signal. As a result, a straight line AB is displayed on the display surface of the display device 34 with reference to the XY coordinate axes of the image plane. The image on the display surface of the display device 34 is displayed on the digitizer table 4 in real time according to the above-described principle, whereby the graphic on the digitizer table 4 is corrected. Of course, a part of the display figure on the digitizer table 4 can be deleted based on the software built in the controller 30.

The above is the case where the display is corrected using the green straight line. However, according to the same principle, a straight line such as red or blue, or a circle or a point can be drawn at the designated position on the digitizer table 4. . The data input to the control device 30 may be processed by another computer system 66 connected to the control device 30 as shown in FIG. 9, but as shown in FIG. 30 processing units
It is configured to be stored in 30a and output to the XY plotter 68. The line drawing information can be input to the digitizer table 4 by a method in which both ends of a line segment are indicated by a light pen as described in the above embodiment, or by a light pen on the digitizer table 4 along a straight ruler 22, 24. A method of drawing a line and inputting the line can be considered. In this embodiment, the scanner 26 is instructed on the vertical rail 12 of the free parallel ruler device 6. As shown in FIGS. 6 and 7, a vertical rail 70 supporting the scanner 26 and incorporating a pulse encoder is provided. Even if the rail 70 is formed separately from the vertical rail 12 of the universal parallel ruler device 6, the rail 70 is connected to the horizontal rail 8 at a right angle to the horizontal rail 8 via a horizontal cursor so as to be slidable. good. Further, the scanning operation may be performed by moving the table side instead of the rail.

〔effect〕

As described above, according to the present invention, since the scanner is integrated with the free parallel ruler, there is an effect that after drawing is completed, the drawing can be easily input to the CAD without removing the drawing from the table.

[Brief description of the drawings]

1 is a front view, FIG. 2 is a sectional view, FIG. 3 is a sectional view, FIG. 4 is a sectional view, FIG. 5 is an external view, FIG. 6 is a front view, and FIG.
FIG. 8 is a sectional view, FIG. 8 is an explanatory diagram, FIG. 9 is a block explanatory diagram, and FIG. 10 is a block explanatory diagram. 2 ... machine stand, 4 ... table, 6 ... parallel ruler device, 8 ... horizontal rail, 10 ... horizontal cursor, 12 ... vertical rail, 14 ... guide rail, 16 ... vertical cursor, 18 ... operation head, 20 ... ruler mounting plate, 22, 24 ... straight ruler, 26 ...
... Scanner, 28 ... Position indicator, 32 ... Screen, 34
…… Display device, 36 …… Lens, 38 …… Light valve, 40 …… Polarizing prism, 42 …… Xenon lamp, 44
... half mirror, 46 ... lens, 48 ... display device, 50 ... lens, 52 ... light valve, 54 ... display device, 56 ... lens, 58 ... reflective mirror, 60 ...
… Light valve, 62… Magnifying projection mechanism, 64… External storage device, 66… Computer system, 70… Vertical rail

Claims (2)

(57) [Claims] 1. A table 4, a horizontal rail 8 fixed to the upper edge of the table 4, and slidably connected to the horizontal rail 8 at a right angle to the horizontal rail 8. A vertical rail 12 having a length capable of crossing substantially the entire drawing range of the table 4, an operation head 18 movably connected to the vertical rail 12, and a detachable / removable attachment to a ruler mounting plate 20 of the operation head 18. A CAD drafting data input device, comprising fixed straightedges 22 and 24 and a scanner 26 disposed on the vertical rail 12 so as to face the table 4. 2. A table 4, a horizontal rail 8 fixed to an upper edge of the table 4, and slidably connected to the horizontal rail 8 at a right angle to the horizontal rail 8. A pair of vertical rails 12, 70 having a length capable of crossing substantially the entire drawing range of the table 4, and an operation head movably connected to one of the pair of vertical rails 12, 70; 18 and a ruler mounting plate 20 of the operation head 18
CAD including straight rulers 22 and 24 detachably fixed to the table and a scanner 26 disposed on the other vertical rail 70 of the pair of vertical rails 12 and 70 so as to face the table 4 surface. Drawing data input device.