JPH06203084A - Automatic drafting device - Google Patents

Abstract

PURPOSE:To provide an automatic drafting device capable of generating an optional kind of a dimension line by retrieving the route of the dimension line so as not to overlap the dimension line and a dimension numeric and preventing the erroneous recognition of dimension values by slanting the bent part of the dimension line. CONSTITUTION:This device is provided with a procedure for obtaining a dimension value position, the coordinates of the both end points of a line segment for generating the dimension line and the generation area of the dimension line through a prescribed input means 1 in order to prepare the dimension line, the means 2 for extending the generation area of the dimension line onto a bit map, the means for retrieving the dimension value position and the drawing route of the dimension line between the line segment end points on the bit map, the means 4 for generating the dimension line on the route retrieved on the bit map, the means 5 for storing the generated dimension line and the means 6 for displaying it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an automatic drafting device,
In particular, the present invention relates to an automatic drafting device in design drafting of a printed wiring board.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, a drawing apparatus of this type receives an input data and determines an external shape or a hole shape of a component in accordance with a programmed procedure to create a component data file. Interference that performs processing related to dimension lines and dimension numbers in the drafting information, with the automatic design unit, the data editing unit that extracts information for drafting assembly drawings and component drawings from the component data file, and creates drafting information for each drawing It has an avoidance processing unit and a drafting processing unit that actually controls the automatic drafting machine based on the drafting information (for example, Japanese Patent Laid-Open No. 62-108373). Since this prior art device is characterized in that an interference avoidance processing unit is provided, FIG.
The operation procedure of the interference avoidance processing unit will be described with reference to FIG.

As shown in FIG. 9, the interference avoidance processing section includes a dimension line drawing direction dispersion processing section, a dimension line type selection processing section, a dimension line length calculation processing section, and a region determination processing section.

The dimension line drawing direction dispersion processing unit determines the presence or absence of the dimension line drawing and the drawing direction of the dimension line based on a predetermined selection criterion in order to prevent the interference of the dimension line and the dimension number from the inputted graphic information. . Here, with respect to the drawing direction of the dimension line, with respect to the X and Y coordinates, the X + direction, the X- direction, and the Y direction.
It can be pulled out in either the + direction or the Y-direction.

Next, the dimension line type selection processing section rearranges the dimension line and dimension number data in the order of dimension values for each of the drawing directions determined by the dimension line drawing direction dispersion processing section described above. The dimension line type is determined from the rearranged data based on the dimension values adjacent to the dimension values in descending or ascending order and the digit heights when the dimension values are plotted.

Next, the dimension line length calculation processing unit determines the start point, the end point of each dimension line, the position of the stepped portion, etc. for each dimension line type by the dimension value or the interval between adjacent dimension lines.

Next, the area determination processing section determines whether or not all the dimension lines and dimension numbers are within a predetermined area set in the drawing.

As described above, in the case of drawing by this system, as shown in the conventional example of FIG. 7 (A), when the dimension line 22 indicating the dimension value 23 of the hole 21 interferes with the dimension number, The dimension line 22 is generated by bending it in a stepwise right angle and avoiding it.

[0009]

In the above-mentioned conventional drafting apparatus, it is necessary to prepare in advance a dimension line type in which the dimension lines and the dimension numbers do not overlap with each other. There was a drawback that I could not cut it. Further, the conventional drafting device described above, the bending direction of the dimension line is at a right angle, but as in the drawing used for manufacturing the printed wiring board, if there are many places where the dimension line occurs,
Regardless of the dimension numbers, the dimension drawing line in the X direction may be orthogonal to the dimension drawing line in the Y direction.
At this time, if the dimension lines are bent at right angles, there is a drawback that the dimension lines may be erroneously recognized when they overlap each other.

[0010]

The automatic drafting device of the present invention is, in an automatic drafting device such as a printed wiring board, a dimension value position where a numeral of a dimension value is located and coordinates of both end points of a line segment for which a dimension line is to be generated. And an input means for inputting information about the dimension line such as the dimension line generation area, a means for expanding the dimension line generation area into a bitmap, and a dimension line drawing path for the dimension value position and the end point of the line segment. On the bitmap, means for generating a dimension line on the path searched on the bitmap, means for storing the generated dimension line, and means for displaying. There is.

[0011]

The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. In this embodiment, an input means 1 for obtaining a dimension value position, a line end point where a dimension line is desired to be generated and a generation area, which are information for creating a dimension line, and a bit map expansion means 2 for expanding the generation area into a bitmap. , A narrow range route searching means 3 for searching a route of a dimension line between a dimension value position and a line end point where the dimension line is generated, a dimension line generating means 4 for generating a dimension line on the searched route, and a generated dimension The storage unit 5 stores line data, and the display unit displays dimension line data. When the storage means decomposes and stores the conductor pattern of the printed wiring board into pixels and stores the conductor pattern of the wiring to be present on the printed wiring board by bit map expansion in which each pixel has one bit. The range for searching the wiring route extends over, for example, substantially the entire plane and multiple layers of the printed wiring board. However, the search for the route of the lead line of the drawing of the printed wiring board which is the subject of the present invention is a route search in a narrow range, for example, from the land end point to the writing start point of the dimension value on the plane. In the specification and drawings, this is called narrow range route search.

Further, FIG. 2 is a flow chart of the operation procedure in the narrow range route searching means 3, and FIG. 3 is information obtained from the input means 1 in order to create a dimension line drawn to show the dimension value of the diameter of the circular hole 21. FIG. 4 is a diagram showing the contents, and FIG. 4 is a diagram in which the generation area 17 obtained by the input means 1 is developed into a bitmap (pixel), and white circles indicate pixels. Further, FIG. 5 is a diagram showing a route search for a dimension line, and FIG. 6 is a diagram showing a procedure for bending the dimension line when an obstacle is hit during the route search.

An automatic drawing apparatus according to an embodiment of the present invention will be described below with reference to FIGS. 1, 2, 3, 4, 5, and 6.

The input means 1 in FIG. 1 will be described with reference to FIG. The information obtained by the input means 1 is the coordinates of the line segment that generated the dimension line, the end point 8, the dimension value position 7 that indicates the position where the dimension value starts to be written, and the generation area that indicates the range for searching the route of the dimension line. Seventeen. The route to search is
From the end point 8 to the dimension value position 7, the dimension value position 7 is shown in FIG.
The route reaching the X coordinate of is searched. This requires a dimension line extending in the X direction if the line segment is parallel to the X axis from the positional relationship of the line segment coordinates. Conversely, if the line segment is parallel to the Y axis, then Y
It is determined that the dimension line extending in the direction is desired, and as a result, it is determined whether the route reaches the X coordinate of the dimension value position 7 or the Y coordinate. This will be described in the narrow range route searching means 3 described later.

The bit map expanding means 2 in FIG. 1 will be described with reference to FIGS. The manufacturing data of the printed wiring board designed by the CAD system or the like in the generation area 17 obtained from the input means 1 is developed in the bitmap 18. At this time, the bitmap 18 is calculated from the coordinate value XY of the end point 8.
The offset value to the address above is issued. That is, the bitmap of FIG. 4 is a two-dimensional array taken on the storage means, and the generation area 17 of FIG. 3 is on the printed wiring board (for example, on a drawing showing the entire printed wiring board). This is the specified area. Therefore, the route of the dimension line obtained by the narrow range route search means is (the drawing of) the printed wiring board.
It is necessary to give the return value (offset value) to reflect it upward.

Next, the narrow range route search means 3 in FIG.
This will be described with reference to the operation flowchart of FIG. 2 and FIGS. 5 and 6.

First, in step 201, the dimension value position 7 from the input means 1, the line end point 8 and the line segment coordinate generation area 17 for which a dimension line is desired to be generated, and the generation area 17 obtained by the input means 1 from the bitmap expansion means 2 are obtained. A bitmap 18 of the manufacturing data in is obtained.

Next, at step 202, if the obtained line segment is parallel to the X axis, a dimension line extending in the X direction is generated from the line segment coordinates, and conversely if the obtained line segment is parallel to the Y axis. For example, it is determined that a dimension line extending in the Y direction is generated. further,
If the X coordinates of the line end point 8 parallel to the X axis and the dimension value position 7 are compared (line end point 8 <dimension position 7), the + X direction, (line end point 8
If it is> the dimension value position 7), it is determined that a route reaching the X coordinate of the dimension value position 7 should be searched with a dimension line extending in the -X direction. This is similarly performed when the obtained line segment is parallel to the Y axis (step 202).

Next, in step 203, the line end point 8
When the route search is started from the search direction 12 by providing a more predetermined space 10, a collision point 1 with another dimension value
Find three.

Next, at step 204, the collision point 1
Find an empty area 11 in the circle with a clearance diameter of 9 from 3. The clearance diameter 9 starts from a certain default value and increases the radius by 1 bit until the route of the dimension line can be secured. As shown in FIGS. 5 and 6, after the clearance diameter 9 that can secure the route of the dimension line is determined, the inside of the circle is divided into four, and the empty area 11 obtained by subtracting the occupied area (occupied area) 14 of other data is created. I want it. The clearance diameter 9 is a relief diameter, and is a diameter from the collision point 13 to the time when a pixel on the dimension line can be confirmed. Further, the occupied area 14 shown by hatching in FIG. 6 is an area where the pixels of the dimension line cannot pass when the clearance diameter is divided into four. In the occupied area 14, the position of the obstacle 13 found during the route search is recognized, and the direction of the dimension line and the presence / absence of bending at the clearance diameter 9 (that is, the dimension line is not always bent, but a straight line is formed). In some cases) and dimension pixels.

Next, as shown in FIGS. 5 and 6, step 2
At 05, the empty area 11 is provided with a bent portion of the dimension line. It is not particularly specified that the bending angle a indicated by reference numeral 15 and the bending angle b indicated by reference numeral 16 are the same. By bending the dimension lines obliquely in this way, erroneous recognition can be avoided when the dimension lines in the XY directions are orthogonal.

Thereafter, in step 206, a route search is similarly performed in the search direction 12.

Next, when the dimension value position 7 is reached on the X coordinate, the dimension line generating means 4 causes the pit map developing means 2
However, while converting the address on the bitmap 18 to the address on the manufacturing data based on the determined offset value, the dimension line is generated and the automatic drawing is advanced.

The dimension line 32 thus generated is shown in FIG.
It shows with (B). The dimension line 32 generated by the present invention is shown in FIG.
As is clear from (B), the bent portion of the dimension line 32 is obliquely generated, and the dimension line of an arbitrary line type is generated in order to search for the dimension line by the narrow range route searching means. .

[0026]

As described above, according to the present invention, a dimension line can be generated with an arbitrary dimension line type in an automatic drafting device such as a printed wiring board, and the bent portion of the dimension line is inclined. , When the dimension lines in the XY directions are orthogonal to each other, there is an effect that erroneous recognition of dimension values is eliminated. Furthermore, since the dimension lines are generated within a predetermined area by determining the area where the dimension lines are generated, there is an effect that wasted drawing space is eliminated and more dimension lines can be generated.

[Brief description of drawings]

FIG. 1 is a flowchart showing the overall operation procedure of the present invention.

FIG. 2 is a flowchart showing an operation procedure of narrow range route searching means.

FIG. 3 is a diagram showing information content for creating a dimension line obtained by an input means.

FIG. 4 is a diagram in which a generation area obtained by an input unit is developed into a bitmap.

FIG. 5 is a diagram showing a route search for a dimension line.

FIG. 6 is a diagram showing a procedure for bending a dimension line when a collision is encountered during a route search.

7 (A) is a dimensional line generated in the related art and FIG. 7 (B) is a dimensional line generated in the present invention.

FIG. 8 is a configuration diagram of a conventional technique.

FIG. 9 is a diagram showing a logical flow of a conventional interference avoidance processing unit.

[Explanation of symbols]

 1 Input Means 2 Bitmap Development Means 3 Narrow Range Route Search Means 4 Dimension Line Generation Means 5 Storage Means 6 Display Means 7 Dimension Value Positions 8 End Points 9 Clearance Diameter 10 Spaces 11 Space Areas 12 Search Direction 13 Collision Points 14 Occupied Areas 15 Folds Bending angle a 16 Bending angle b 17 Generation area 18 Bit map 21 Figure showing a circular hole 22, 32 Dimension line 23 Numbers showing dimension value

Claims (3)

[Claims] 1. A means for inputting information such as a dimension value position where a dimension value is to be located, coordinates of both end points of a line segment for which a dimension line is to be generated, and a dimension line generation area, and a bitmap of the dimension line generation area. , Means for searching the line for drawing out the dimension line between the dimension line position and the end point of the line segment on the bitmap, and means for generating the dimension line on the line searched for on the bitmap An automatic drafting device comprising: a means for storing the generated dimension line; and a means for displaying the generated dimension line. 2. A direction in which a dimension line is extended is determined, a collision point with another dimension line is found, and if there is a collision point, an area free from the collision point within a circle having a clearance diameter is found. 2. The automatic drafting device according to claim 1, wherein the step of bending the dimension line at an arbitrary angle in the empty area is performed by means for searching the lead line of the dimension line on the bitmap. . 3. The automatic drafting device according to claim 1, wherein the dimension line is a dimension line in a design drawing of a printed wiring board.