JP3076288U - Perspective drawing auxiliary ruler - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The present invention is intended to be used in perspective drawing work in a narrow work space without using complicated or large-scale equipment and without complicated calculations. It is a straight ruler with the function of drawing a "straight line". SOLUTION: The present invention provides a color scale for the purpose of increasing a numerical scale 2 and a visibility symmetrically with respect to two parallel sides of a straight ruler by setting 0 scales 1 in the center of each side, and symmetrically with respect to the 0 scales 1. Three
It has been subjected to. By the above-mentioned contrivance, the two straight lines which are the basis of the perspective drawing are simultaneously 0 on the two sides of the straight ruler.
The position and angle of the straightedge can be easily adjusted so as to pass through the point of symmetry from the scale 1. When the straight ruler is placed in such a state, the straight line connecting the 0 graduations 1 on both sides is exactly the middle line between the two reference straight lines, and passes through the intersection of the two reference straight lines on its extension. By repeating the above-described means, it is possible to draw a plurality of straight lines having the same intersection.

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straight ruler having a function of drawing a plurality of straight lines having the same intersection, which is frequently used in perspective drawing.

[0002]

2. Description of the Related Art When plotting the above-mentioned "a plurality of straight lines having the same intersection", if the intersection is not included in the drawing paper range, conventionally, a work space is widened and a long ruler is used. They were drawing or using large-scale drafting equipment, such as a complex mechanism or a ruler and workbench integrated. Many of these were expensive and there was also a risk of failure due to the complexity of the mechanism.

[0003]

[Problem to be solved by the present invention] The above-mentioned drawbacks are solved by a ruler according to the present invention, which has a simple working mechanism in a narrow working space, does not require complicated calculation and work methods, and has no fear of failure or malfunction. Is what you do.

[0004]

Means for Solving the Problems In the present invention, when focusing only on one side of the ruler, a numerical scale and a color arrangement arranged symmetrically with respect to the 0 scale are used, and a method of an embodiment described later is used. The center point of any two points can be easily determined. Since the scales are set on two parallel sides of the straight ruler, a straight line that is located exactly in the middle of any two straight lines and intersects the intersection of the two straight lines can be drawn by the method of the embodiment described later. By repeating this procedure, it is possible to draw a plurality of straight lines having the same intersection between any two reference straight lines.

[0005]

Embodiments of the present invention will be described below with reference to the accompanying drawings. (FIG. 1) Reference numeral 1 denotes a zero scale of a ruler, which is located at the center of each of two parallel sides. Reference numeral 2 denotes a numerical scale, which indicates a distance from the zero scale. Each side is symmetrically arranged with the 0 scale 1 interposed therebetween. Reference numeral 3 denotes a color scheme for enhancing visibility, and the divisions and ranges are indicated by oblique lines or the like for convenience in the drawings. Like the numerical scale 2, they are arranged symmetrically with the 0 scale 1 interposed therebetween. In FIG. 2 and subsequent figures, hatching is omitted for simplicity. First, a method for obtaining an intermediate point between two arbitrary points using only one side of the ruler will be described. Adjust the position of the ruler so that any two points are exactly symmetrical with respect to the zero scale 1 of the ruler. At this time, the color scheme 3 provided symmetrically with respect to the 0 scale 1 enhances visibility in work. After the adjustment of the position, the 0 scale 1 at that time becomes an intermediate point between the two points. (FIG. 2) Reference numerals 4a and 4b denote arbitrary two straight lines serving as a basis for perspective drawing. 5 is an intermediate line between any two straight lines 4a and 4b, and is a straight line for drawing. In order to obtain the intermediate line 5 between the two straight lines 4a and 4b, the above-described method is performed simultaneously on two parallel sides of the ruler. The position and angle of the ruler are adjusted such that the intersection of the two straight lines 4a and 4b and each side of the ruler is symmetrical with respect to the 0 scale 1 on each side. When the adjustment is completed, mark the position of 0 scale 1 on each side and draw a straight line connecting these two marks, that is, the middle line between the two straight lines.

[0006]

[Embodiment] In the above-mentioned "Embodiment of the invention", the method of drawing inside the two reference straight lines is described. However, by using the following method, it is also possible to draw outside the two reference straight lines. I can do it. (FIG. 3) Reference numerals 6a and 6b denote arbitrary two straight lines serving as a basis for perspective drawing. Reference numeral 7 denotes a straight line which is outside the arbitrary two straight lines 6a and 6b and which passes through the intersection of the two straight lines 6a and 6b as an extension of the straight line. The position and angle of the ruler are adjusted so that one of the two reference straight lines 6a and 6b (6b in the example) intersects simultaneously with the 0 scale 1 on the two sides of the ruler. Next, on each side of the ruler, a symmetrical position is marked with the intersection of the other line (6a in the example) and the 0 scale 1. The straight line connecting these two marks is a straight line 7 outside the two reference straight lines and having the same intersection as the two straight lines.

[0007]

[Effects of the Invention] As described above, if this ruler is used, a plurality of straight lines having the same intersection can be easily drawn without any restrictions such as the angle of view and the angle of looking down. Basically, however, two intermediate lines are drawn, and then the intermediate line is drawn and repeated. Therefore, it is not always possible to draw a line with the same intersection from all coordinates. In some cases, it is also required to draw by visual measurement with the aid of lines drawn using this ruler. Therefore, it is somewhat unsuitable for drawing that requires precision, but it is sufficiently effective for drawing and illustration at a level that does not require precision. In addition, since it can be used in a small work space and the expected price is low due to the low manufacturing cost, it is very effective for students and hobbies.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a plan view showing a typical embodiment using the present invention.

FIG. 3 is a plan view showing an embodiment using the present invention.

[Explanation of symbols]

1, 0 scale 2, numerical scale 3, color scheme for enhancing visibility 4a, 4b, arbitrary two straight lines that are the basis of perspective drawing 5, intermediate line of 4a, 4b derived using the present invention 6a, 6b , Any two straight lines that are the basis of the perspective drawing 7, a straight line that is outside of 6a and 6b derived using the present invention and that passes through the intersection of 6a and 6b on its extension

Claims (1)

[Utility model registration claims] 1. A zero scale is arranged at the center of one side of a straight ruler, a numerical scale and a color scheme for enhancing the visibility of a symmetrical position are applied symmetrically with respect to the center, and further, another parallel side is also provided. Straight ruler characterized by the same scale and color scheme.