JPH0331593Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvements in transparent rulers mainly made of plastic, such as straight rulers, triangular rulers, and protractors.

Hitherto, a transparent ruler whose entire lower surface is a finely roughened surface on which writing can be performed with a pencil, and whose edges are lined with graduation lines has been known from, for example, Japanese Utility Model Application Publication No. 55-52387.

However, with this structure, the entire bottom surface is a finely rough surface that can be written on with a pencil, so when you place a ruler on it and look through the letters, symbols, ruled lines, etc. on the paper below, the same rough surface is used. Not only does this get in the way, making it impossible to do this clearly, but the scale lines do not form a space for landmark markings near the center, so, for example, it is impossible to do this clearly on many sheets of paper. When marking a part of a scale line and using it as a reference point when marking or drawing lines to create tables or columns, place the mark at the far end of the scale line. As a result, the distance between this mark and the corresponding mark on the edge of the ruler becomes wider, leading to misunderstandings in determining the positional relationship between the two, and the above-mentioned reference point There were problems such as errors easily occurring in the work of distinguishing strokes and line drawings.

This invention has a grid line arranged on the edge of the transparent ruler body with a space for marking marks near the center, and a band shape that allows writing with a pencil on the underside of the ruler body only at the part where the scale line is arranged. The purpose of the present invention is to solve these problems by providing a ruler that is characterized by having a fine rough surface portion formed thereon.

In addition, in the illustrated embodiment, a 1 mm
Scale lines 3 and 4 in units of 1 cm are placed on the lower surface of the other side portion 5, and graduation lines 6 and 1 in units of 5 mm are placed on the lower surface of the other side portion 5.
A scale line 7 in units of cm is printed, a scale line 6 in units of 5 mm and a scale line 7 in units of 1 cm are printed at the center, and a grid line 8 in units of 5 mm and an orthogonal scale line 9 in units of 1 mm are printed at the same center. A step of providing a transparent layer 12 by silk printing with transparent ink on the lower surface of both side portions 2, 5 and the lower surface of the printed portion 10 of the orthogonal scale line 9 of the straight edge main body 1; A fine rough surface 13 on which writing can be written with a pencil is provided by applying pressure to the surface using a pressing body (not shown) having a rough pressure surface, and the above-mentioned 1 mm unit scale is provided. A space 14 for marking is provided at a position near the center of each of the lines 3 and 1 cm graduation lines 4.

In this invention, as mentioned above, scale lines are arranged on the edge of the transparent ruler body, and a fine rough surface that can be written with a pencil on the bottom of the ruler body is formed only in the area where the scale lines are arranged. You can use this to write a mark on the ruler body, and use this mark as a reference to easily mark markers and draw lines to create uniform tables and columns on multiple sheets of paper. Of course, in the present invention, a space for marking the mark is provided near the center of the scale line, so by writing the mark in the same place, the mark can be placed on the edge of the ruler. There is an advantage in that the above-mentioned marking and line-drawing work can be reliably performed by using these marks provided in adjacent parts, and in the present invention, the above-mentioned rough surface is provided only along the above-mentioned scale lines. Therefore, the remaining part of the ruler body remains completely transparent, allowing the characters, symbols, and ruled lines on the paper below to be clearly seen through that part. With these features, the present invention has the effect of being able to sufficiently solve the above-mentioned problems.

[Brief explanation of drawings]

The drawings show one embodiment of the ruler of the present invention, in which FIG. 1 is a perspective view of the entire ruler seen from the back side, and FIG. 2 is a sectional view taken along line A--A in FIG. 1. 1... Ruler body, 2... One side part, 3...
Unit scale line, 4... 1 cm unit scale line, 5... Other side part, 6... 5 mm unit scale line, 7... 1 cm unit scale line, 8... Square scale line, 9... Orthogonal scale line, 10...Printed portion, 12...Transparent layer, 13...
...Fine rough surface that can be written on with a pencil, 14...Space for marking marks, 15...Narrow metal piece.

Claims (1)

[Scope of utility model registration request] On the edge of the transparent ruler body, scale lines are arranged near the center with a space for marking marks, and only in the area where the scale lines are arranged, there is a fine band-shaped strip that can be written on the underside of the ruler body with a pencil. A ruler characterized by having a rough surface.