JP3936710B2 - ruler - Google Patents

Description

The present invention relates to a ruler for drawing basic figures such as a quadrangle, a triangle, and a parallelogram.

Conventional rulers for drawing basic figures such as rectangles, triangles, and parallelograms include straight rulers and triangle rulers. In addition, there is a template in which the shape and size of a figure are determined in advance. Alternatively, there is a template in which a hole having a predetermined shape such as a regular square or a regular triangle is formed in a base plate and dimensions are displayed on each side thereof.
International Publication No. W099 / 26795

To draw a basic figure such as a rectangle, triangle, or parallelogram using a straight ruler or triangle ruler, you must draw lines one by one while keeping the angle constant at 90 degrees or 60 degrees. I can't draw. Further, in order to draw a figure using a template, since the shape and size of the figure are determined in advance, it is difficult to draw a figure having a desired shape in an arbitrary size. A lot of templates are required to draw the shape of the shape you want to draw in various sizes, and the template you want may not exist.

Connect both ends of the four straight rulers so that their opposite sides are equal in length by connecting means such as eyelets so that they can be rotated relative to each other. In addition, the vertical surface of the concavo-convex surface functions as a stopper so that the apex angle formed by the inner periphery of adjacent straight rulers can be fixed at a constant angle such as 60 degrees or 90 degrees. By fixing the apex angle to a certain angle, two lines can be drawn in a single stroke in a single stroke along both sides of the apex angle, making it easy to draw figures with a certain angle. And you can draw quickly. In addition, it is possible to draw a figure of any size within the range of the displayed dimensions. In this case, since the zero position of the display dimension varies depending on the angle of the apex angle, it is necessary to display a dimension corresponding to the angle of the apex angle on the front and back of this ruler. Therefore, this ruler is manufactured by combining two angles such as 60 degrees and 90 degrees to be fixed. Also, the angle can be arbitrarily set to 30 degrees, 45 degrees, and the like.

If the apex angle is fixed, two lines can be drawn continuously in one stroke along both sides of the apex angle in a single stroke, so various figures can be drawn easily and quickly. I can do it. In addition, it is possible to draw a figure of any size within the range of the displayed dimensions. For example, if the apex angle is fixed at 90 degrees, a square and a rectangle can be drawn easily and quickly in an arbitrary size. If one apex angle is fixed at 60 degrees, right triangles, equilateral triangles, standard rhombuses, parallelograms, trapezoids, etc. can be drawn easily and quickly in any size.

That is, when this ruler is manufactured so that the apex angle can be fixed at 60 degrees and 90 degrees, one ruler can be a square, a rectangle, a right triangle, an equilateral triangle, a standard rhombus, a parallelogram, and a trapezoid. One figure can be drawn easily and quickly in any size.

  The best mode for carrying out the present invention will be described based on an embodiment with reference to the drawings. As shown in FIG. 1, both ends of the four straight rulers 1, 2, 3, and 4 are connected so as to be relatively rotatable with an eyelet 5 or the like so that the lengths of opposite sides thereof are equal, and apex angles α1 and α4 are set. It can be fixed at 60 degrees, and the apex angles α2 and α3 can be fixed at 90 degrees. FIG. 1 shows a state in which the apex angles α2 and α3 are fixed at 90 degrees. When the apex angles α1 and α4 are changed to 60 degrees, the zero position of the display dimension is shifted as shown in FIG. Therefore, as shown in FIG. 3, dimensions corresponding to the case where the apex angles α1 and α4 are changed to 60 degrees are displayed on the back side of the ruler. FIG. 3 is a view when the ruler is turned over by changing the apex angles α1 and α4 of FIG. 1 to 60 degrees, and the zero positions of the dimensions are displayed together. As a result, it is possible to easily and quickly draw seven shapes such as a square, a rectangle, a right triangle, a regular triangle, a standard rhombus, a parallelogram, and a trapezoid with a single ruler.

  In order to draw a square or rectangle of an arbitrary size using the ruler of FIG. 1, first, two lines are drawn with an arbitrary length along both sides of the apex angle α2 (or α3). Next, the entire ruler is shifted, the position of the ruler is determined so that the shape formed by the drawn line and both sides of the apex angle α3 (or α2) is a square or a rectangle, and two lines are drawn similarly.

To draw a right-angled triangle of any size using the ruler of FIG. 3, first, the length of the diagonal line and the base of the right-angled triangle is 2 to 1 along both sides of the apex angle α4 (or α1). Draw two lines. Next, the entire ruler is shifted and the remaining lines are drawn using arbitrary sides.

  In order to draw an equilateral triangle of an arbitrary size using the ruler of FIG. 3, first, two lines are drawn with an arbitrary length along both sides of the apex angle α4 (or α1). Next, the entire ruler is shifted and the remaining lines are drawn using arbitrary sides.

In order to draw a rhombus or a parallelogram of an arbitrary size using the ruler of FIG. 3, first, two lines with an arbitrary length are drawn along both sides of the apex angle α4 (or α1). Next, the entire ruler is shifted, and the position of the ruler is determined so that the shape formed by the drawn line and both sides of the apex angle α1 (or α4) becomes a rhombus or a parallelogram, and two lines are drawn.

To draw a trapezoid of an arbitrary size using the ruler of FIG. 3, first, two lines are drawn with an arbitrary length along both sides of the apex angle α4 (or α1). Next, the entire ruler is shifted while rotating to the right, and the position of the ruler is determined so that the shape formed by the drawn line and both sides of the apex angle α3 (or α2) becomes a trapezoid, and two lines are drawn.

As a method of connecting the both ends of the four straight rulers so as to be relatively rotatable, there are methods such as a screw, a bolt / nut, a combination of a shaft and a retaining ring, a combination of a shaft and a pin, in addition to the eyelet.

This ruler can also be manufactured with a structure as shown in FIG. In the case of the structure as shown in FIG. 4, the strength is weaker than in the case of FIG.

This ruler can be made of materials such as bamboo, wood, plastic, aluminum, steel, etc., which are usually used when making a ruler.

  This ruler can be made in any size. The width and length of the four straight rulers can be set arbitrarily. However, it is necessary to make the lengths of opposite sides equal.

Examples of the use of this ruler include: (1) used by students and students when drawing basic figures and graphs, or when performing woodworking, and (2) character lines and lines in offices, etc. It can be used when drawing a flowchart (flowchart) or the like, or (3) used when drawing a basic figure or the like using a marking needle or the like at the factory site.

The ruler of an Example is shown, (a) is a top view, (b) is a side view, (c) is a front view. FIG. 2 is a plan view when the apex angle α1 of FIG. 1 is relatively rotated and changed to 60 degrees. It is a top view at the time of turning over the ruler of FIG. Another Example is shown, (a) is a plan view, (b) is a side view, and (c) is a front view.

Explanation of symbols

1, 2, 3, 4 Straight ruler 5 Eyelet α1, α2, α3, α4 Vertical angle

Claims (1)

The installation surface by connecting both ends of the four straight rulers so that they can be rotated relative to each other by connecting means such as eyelets so that the lengths of the opposite sides are equal, and connecting both ends of the straight ruler with an uneven surface A ruler that eliminates the step and allows the vertical surface of the uneven surface to function as a stopper so that the apex angle formed by the inner periphery of adjacent straight rulers can be fixed at a fixed angle such as 60 degrees or 90 degrees.

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