JP6278746B2 - Triangular scale - Google Patents

Description

  The present invention relates to a triangular scale having an elongated substantially triangular prism shape, including three scale surfaces, and a total of six scale regions along the longitudinal sides on both sides of each scale surface.

  As described above, the triangular scale has a long and narrow triangular prism shape and includes three long sides and three scale surfaces, and a total of six scale regions are formed along the long sides on both sides of each scale surface. In each scale area, a scale indicating the length of a different scale factor and a number corresponding to the scale are formed (see Patent Document 1).

Noto 3030996 gazette

  The conventional triangular scale is generally selected from the six scale areas according to the scale of the drawing, and the scale is used to measure the length of the line in the drawing, or it is necessary. This is used to add a straight line with a long length in the figure.

  By the way, in a situation where a triangular scale is used, it is necessary to check the angle between two straight lines that intersect in the drawing, or to add a straight line that intersects one straight line at a predetermined angle. May be. Of course, in such a case, it is sufficient to use a protractor, but it is not uncommon that the place is outside the site and does not have a protractor, which hinders the smooth execution of work. There was a possibility.

As described in claim 1, an elongated substantially triangular prism shape, three scale surfaces A, B, and C, a long side AB corresponding to a butted portion of the scale surface A and the scale surface B, and the scale Formed along the longitudinal side AC of the surface A and the scale surface C, the longitudinal side AC corresponding to the butted portion of the scale surface B and the scale surface C, and the longitudinal side AB of the scale surface A Of the scale surface Ab, the scale region Ac formed along the longitudinal side AC of the scale surface A, the scale region Ba formed along the longitudinal side AB of the scale surface B, and the scale surface B The scale region Bc formed along the longitudinal side BC, the scale region Ca formed along the longitudinal side AC of the scale surface C, and the length of the scale surface C A triangular scale comprising and a scale region Cb formed along BC,
The scale region Ba along the longitudinal sides AB of the scale surface B, a one of the reference marks, and the scale for length measurement, the length from the reference scale by setting one of the scale to the reference scale A number for display , and the reference scale and the reference mark coincide on the long side AB ,
On the other hand, in the scale region Ca along the long side AC of the scale surface C, a position where an imaginary straight line passing through the reference mark and crossing the scale surface A is perpendicular to the long side AC is used as an angle reference point. When the length of the short side of the scale surface A is (W) mm along the long side AC, an angle mark indicating an angle of (90 ° −θ) is placed at a position at a distance of (Wtanθ) mm. Provide a provided triangular scale.

According to a second aspect of the present invention, the scale for measuring the length is provided in almost the entire length of the scale region Ba, and the scale at the center thereof is set as a reference scale. The scale and the reference mark are set so as to coincide on the long side AB,
On the other hand, the number for displaying the length from the reference scale provides the triangular scale according to claim 1, which is provided in both directions starting from the reference scale .

According to a third aspect of the present invention, there are provided a plurality of the angle marks by changing the value of the θ with respect to one angle reference point over almost the entire length of the scale region Ca. The triangular scale according to Item 1 or 2 is provided.

According to a fourth aspect of the present invention, the angle mark is formed of a combination of a scale and a number, and the lower side of the number of the angle mark is opposed to the longitudinal side AC of the scale region Ca. Then, the triangle scale according to any one of claims 1 to 3, in which numerals of angle marks are arranged in a reverse direction in comparison with a display form of numerals in a normal triangle scale.

  In addition, as described in claim 5, a removable cover member capable of covering at least the scale region Ba of the scale surface B and the scale region Ca of the scale surface C is formed, and the scale region is formed on the cover member. The triangular scale according to claim 1, wherein Ba and Ca are formed and the reference mark and the angle mark are provided thereon.

  When a triangular scale is applied to an arbitrary straight line in the drawing so that the scale surface A faces downward and passes through two points of the reference marks and the angle marks of the scale areas Ba and Ca, the triangular scale has an angle with respect to the straight line. It has an inclination of the angle indicated by the mark. Therefore, if a straight line is drawn from the reference mark along the long side AB, a straight line having an angle indicated by the angle mark can be drawn with respect to an arbitrary straight line without using a protractor. Of course, when two straight lines intersecting each other in the drawing intersect at the angle indicated by the angle mark, the long side AB of the triangular scale is aligned with one straight line, and the other straight line is the reference mark and the angle mark. It can be confirmed by whether or not the two points are passed.

Also, if so as to form a scale and numbers indicating the length scale region Ba provided with standards mark the desired angle and length of the straight line that originates a reference mark, can be very easily drawing.
In addition, when the number indicating the length is provided bi-directionally starting from the reference scale as in the triangular scale of claim 2, a desired angle and length starting from the reference mark and the reference scale are used. The straight line can be easily drawn in either direction.

As described in claim 3 , a plurality of angle marks can be provided over a substantially entire length of the scale region Ca by changing the value of θ with respect to one angle reference point. Since the angle can be accommodated, convenience is further improved.

  In addition, as described in claim 4, the lower side of the number of the angle mark is opposed to the longitudinal side AC corresponding to the scale region Ca, and thus the comparison is made in comparison with the number display mode on a normal triangular scale. When the number of the angle mark is arranged in the direction, when working in a posture where the triangular scale is looked down from directly above, the number on the reference mark and the number on the angle mark side are aligned in the same direction, making it easy to see. Misreading is unlikely.

  Further, as described in claim 5, if the scale region Ba of the scale surface B and the scale region Ca of the scale surface C are covered with a cover member and a reference mark and an angle mark are provided there, an existing mark is provided. Triangular scale can be modified inexpensively and easily.

It is a top view of a triangular scale. It is an enlarged side view of a triangular scale. It is an expanded view which shows the scale surfaces A, B, and C of a triangular scale. It is the perspective view seen from the scale surface B side of a triangular scale. It is the perspective view seen from the scale surface C side of the triangular scale. It is an expanded side view of the triangular scale which shows another form.

Embodiments of the present invention will be described below with reference to the drawings.
The triangular scale 1 has an elongated substantially triangular prism shape (the embodiment is a substantially regular triangular prism shape), and has three scale surfaces A, B, and C each having a short side length (W) mm as shown in FIG. And three longitudinal sides AB, AC, and BC, which are the butted portions of the scale surfaces A, B, and C, respectively.
The long side AB corresponds to the butted portion of the scale surface A and the scale surface B, and the long side AC corresponds to the butted portion of the scale surface A and the scale surface C. The longitudinal side BC corresponds to the butted portion of the scale surface B and the scale surface C.

As shown in FIG. 2, the scale surface A is provided with a concave groove 2 at the center, and two scale regions Ab and Ac are provided along the longitudinal sides AB and AC with the concave groove 2 interposed therebetween. Similarly, the scale surface B is provided with two scale regions Ba and Bc along the long sides AB and BC with the concave groove 2 interposed therebetween. Similarly, the scale surface C has the long sides BC and B with the concave groove 2 interposed therebetween. Two scale regions Ca and Cb are provided along the AC.
The scale region Ab is provided along the long side AB of the scale surface A, the scale region Ac is provided along the long side AC of the scale surface A, and so on. The scale region Ba is along the longitudinal side AB of the scale surface B, the scale region Bc is along the longitudinal side BC of the scale surface B, the scale region Ca is along the longitudinal side AC of the scale surface C, and the scale region Cb is scaled. It is provided along the longitudinal side BC of the surface C.

  Therefore, the triangular scale 1 of the embodiment has scales positioned on the front side and the outer side as viewed from the user side of the scale surfaces B and C with the scale surface A in contact with the paper surface as shown in FIG. Reference marks 3 and angle marks 4 are provided in the areas Ba and Ca.

[Reference mark]
As shown in FIGS. 1, 3 and 4, the reference mark 3 is provided only in the center of the scale area Ba of the scale surface B. The reference mark 3 is set to “0” and symmetrically from there. Numbers indicating the scale and length for 80 mm are formed at intervals of 1 mm.

[Angle mark]
The angle mark 4 corresponding to the reference mark 3 is formed in a state where scales and numbers are combined in almost the entire scale area Ca of the scale surface C, as shown in FIGS.

Each angle mark 4 has a position where a virtual straight line (not shown) crossing the scale surface A through the reference mark 3 is perpendicular to the longitudinal side AC, and the angle reference point 5 is set along the longitudinal side AC therefrom. The actual scale is formed with a scale provided at a position of (Wtanθ) mm and a number indicating an angle of (90 ° −θ). Specifically, when the length W of the short side of the triangular scale 1 in FIG. 1 is 15 mm, the angle reference point 5 is set at a position where the virtual straight line passes through the reference mark 3 and is orthogonal to the long side AC, On the other hand, for example, assuming that θ is 60 °, a scale at a position of about 26 mm which is a calculated value of (Wtan θ) = (15 tan 60 °) and “30 °” where (90 ° −θ) = (90 ° −60 °) = 30 ° Is described. Accordingly, if the two points of the reference mark 3 in the scale area Ba and the 30 ° angle mark 4 displayed in the scale area Ca are aligned with the straight line XY in FIG. 1, the triangular scale 1 is set to 30 ° with respect to the straight line XY. Can be tilted.
In the embodiment, θ is set from 0 ° to 80 °, and the corresponding scales and numbers from 90 ° to 10 ° are provided symmetrically about the angle reference point 5.
The numbers indicating the angles are displayed at intervals of 10 ° from the viewpoint of the space limitation of the scale area Ca and the ease of viewing.

  Further, as shown in FIGS. 1, 3, and 5, the number of the angle mark 4 is contrary to the display mode of the number attached to the scale of the normal triangular scale, and the longitudinal side AC corresponding to the scale region Ca is displayed. It is drawn in the opposite direction, that is, upside down. Accordingly, as shown in FIG. 2, when the triangular scale 1 is used looking down from directly above, the numbers on the reference mark 3 side and the numbers on the angle mark 4 side are aligned in the same direction as shown in FIG. This makes it easier to read the scales and makes it difficult to read the scale.

  Since the triangular scale 1 of the embodiment is configured as described above, when the direction of the straight line XY in the drawing is adjusted so as to pass through two points of the reference mark 3 of the scale region Ba and the angle mark 4 of the scale region Ca. The triangular scale 1 has an inclination of an angle indicated by the angle mark 4 with respect to the straight line XY. Therefore, if a straight line is drawn from the reference mark 3 along the long side BA, a straight line inclined at an angle indicated by the angle mark 4 can be drawn with respect to an arbitrary straight line without using a protractor. In addition, a straight line having an arbitrary length can be accurately drawn from the reference mark 3 by using a scale having a length formed in the scale region Ba. By the way, in order to draw a similar straight line using a conventional protractor and a ruler, draw a straight line of an appropriate length while measuring the angle with a protractor, and change the protractor to a ruler and measure the length. Work is necessary.

  When measuring the angle between two straight lines intersecting each other, the long side AB of the triangular scale 1 is matched with one straight line, and the reference mark 3 of the scale region Ba is matched with the intersection of the straight lines. In this state, the angle mark 4 on the scale area Ca through which the intersecting straight lines pass may be read.

  The scale areas Ab, Ac, Bc, and Cb other than the scale areas Ba and Ca of the triangular scale 1 are not shown in the drawing, but, as with a normal triangular scale, scales indicating different scale ratio lengths. A number corresponding to the scale is formed.

  As mentioned above, although embodiment of this invention was described, of course, this invention is not limited to the said embodiment. For example, in the embodiment, the reference mark 3 and the angle mark 4 are directly displayed on the scale areas Ba and Ca of the triangular scale 1, but as shown in FIG. 6, at least the scale area Ba of the scale surface B, A removable cover member 6 that can cover the scale area Ca of the scale surface C is formed of, for example, an opaque synthetic resin, scale areas Ba and Ca are formed on the cover member 6, and the reference mark 3 and the angle mark 4 are formed there. May be provided. In this case, since the entire scale surface A is covered with the cover member 6 and the scale regions Ab and Ac are hidden, the scale regions Ab and Ac of the scale surface A are drawn on the portion of the cover member 6 covering the scale surface A. It is good to do. According to such an embodiment, the existing triangular scale can be easily and inexpensively modified. Although not shown, the cover member 6 may be formed in a cylindrical shape having a triangular cross section so as to completely cover the existing triangular scale.

In the embodiment, a large number of angle marks 4 are provided over the entire scale area Ca. For example, the angle marks 4 can correspond to 30 °, 60 °, 45 °, and 90 ° that can be measured with a triangle ruler. On the other hand, the scale region Ca may be provided with a scale having a length as in a normal triangular scale, and the angle marks 4 may be scattered therein. The angle mark 4 in this case may be a combination of a scale and an appropriate symbol (star shape, triangle, double circle, etc.).
In the embodiment, one reference mark 3 is provided at the center of the scale area Ba. However, a scale having a length used for a normal triangular scale is formed in the scale area Ba and both ends of the scale area Ba are formed. A scale may be set as a reference mark.

  In the embodiment, the position of the angle mark 4 in the scale area Ca is derived by calculation. However, the position of the angle mark 4 in the scale area Ca is derived by a calculation method other than the above or by drawing (CAD). Also good. In short, if the reference mark and the angle mark eventually satisfy the relationship defined in claim 1, the intended purpose of the invention can be achieved, and what is the method for forming the angle mark 4? It does not matter.

  In the embodiment, the scale of the angle mark 4 is formed by a vertical line orthogonal to the longitudinal side AC like the length scale. However, each scale of the angle mark 4 is an extension of the reference mark 3 in FIG. You may make it incline radially toward the intersection of a line and the longitudinal side BC. In such a case, the inclination of the scale serves as a guide when aligning the angle mark 4 with a straight line.

A, B, C ... Scale surface AB, AC, BC ... Long side Ab, Ac, Ba, Bc, Ca, Cb ... Scale region 1 ... Triangular scale 3 ... Reference mark 4 ... Angle mark 5 ... Angle reference point 6 ... Cover Element

Claims (5)

An elongated triangular prism shape having three scale surfaces A, B, and C, a long side AB corresponding to a butt portion of the scale surface A and the scale surface B, and a butt of the scale surface A and the scale surface C A longitudinal side AC corresponding to the portion, a longitudinal side BC corresponding to the butted portion of the scale surface B and the scale surface C, a scale region Ab formed along the longitudinal side AB of the scale surface A, and the scale The scale region Ac formed along the longitudinal side AC of the surface A, the scale region Ba formed along the longitudinal side AB of the scale surface B, and the longitudinal side BC of the scale surface B. A scale region Bc, a scale region Ca formed along the longitudinal side AC of the scale surface C, and a scale formed along the longitudinal side BC of the scale surface C. A triangular scale consisting comprises a Le region Cb, and,
The scale region Ba along the longitudinal sides AB of the scale surface B, a one of the reference marks, and the scale for length measurement, the length from the reference scale by setting one of the scale to the reference scale A number for display , and the reference scale and the reference mark coincide on the long side AB ,
On the other hand, in the scale region Ca along the long side AC of the scale surface C, a position where an imaginary straight line passing through the reference mark and crossing the scale surface A is perpendicular to the long side AC is used as an angle reference point. When the length of the short side of the scale surface A is (W) mm along the long side AC, an angle mark indicating an angle of (90 ° −θ) is placed at a position at a distance of (Wtanθ) mm. Triangular scale characterized by being provided. The scale for measuring the length is provided in almost the entire length of the scale area Ba, and the center scale of the scale is set as a reference scale, and the reference scale and the reference mark are on the long side AB. Is set to match,
2. The triangular scale according to claim 1, wherein the number for displaying the length from the reference scale is provided in both directions starting from the reference scale. 3. The angle mark is provided in a plurality of substantially all the lengths of the scale area Ca by changing the value of θ with respect to one angle reference point. 4. Triangular scale. The angle mark is formed of a combination of a scale and a number, and the lower side of the number of the angle mark is opposed to the longitudinal side AC of the scale region Ca, so that the number is displayed on a normal triangular scale. The triangle scale according to any one of claims 1 to 3, wherein the numbers of angle marks are arranged in the opposite direction in comparison with.   A removable cover member that can cover at least the scale region Ba of the scale surface B and the scale region Ca of the scale surface C is formed, and the scale regions Ba and Ca are formed in the cover member, and the reference is formed there. The triangular scale according to any one of claims 1 to 4, wherein a mark and the angle mark are provided.

Images