JPH0333514Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a magnetic ruler for drafting that can be used for drawings in various industries.

(Prior art) Conventionally, for example, a triangular ruler held and fixed in a predetermined position or another triangular ruler is slid along one side of the T ruler to draw many parallel lines or square or triangular figures. A drafting method using a drafter (registered trademark) or a drafter (registered trademark) is generally known.

(Problem that the invention aims to solve) However, in these drafting methods, the spacing between parallel lines was determined in advance with a divider or determined by eye, but the former is troublesome and takes unnecessary time and effort, while the latter This required skill, and even if one concentrated one's attention, the spacing would be uneven, resulting in poor quality drawings. Moreover, there is a risk that the ruler may slip during drafting and cause an unexpected mistake, and it is also impossible to efficiently draw a wide variety of diagrams, such as square shapes that require a center line, in a short period of time. Furthermore, in the past, there was no easy storage space for small drafting tools and writing utensils, so they were easily lost, and searching for them required unnecessary time, which significantly reduced drafting efficiency. Therefore, the finishing of the drawing was delayed.

(Means for solving the problem) This invention was made in order to solve the above problem, and it uses multiple magnetic straightedges in a beveled manner with the main straightedge as a reference. This allows you to easily draw figures using parallel lines, slanted lines, etc.

The magnetic ruler for drafting of this invention will be explained in detail below with reference to drawing examples. First, 1 is a main straight ruler having a storage groove 5 inside and a protrusion 4 (which also serves as a knob) that protrudes upward at one end. Then, on the reference side 2 of one edge, scales 3 of the actual scale are attached to the left and right from the 0 index 9 at the center, and on the reference side 2 of the other edge, the scale 3 of 1/2 scale is attached. has been done.
Further, a guide piece 7, which can form a right-angled guide plate A by rotation, is pivotally attached to the protrusion 4. That is, in the embodiment shown in the drawings, two guide pieces 7a and 7b, each having a claw portion, are pivoted by a pivot shaft 8, and in the state of the normal drafting straightedge shown in FIG. When 7a is pressed downward and rotated to the right as shown by the arrow, the pawl portion of the guide piece 7a pushes up the pawl portion of the guide piece 7b and rotated to the left as shown by the arrow. Since the ends of both guide pieces 7a and 7b protrude downward from the lower surface of the main straight ruler 1, they themselves constitute a right angle guide plate A and have the function of a T ruler. In order to return from the T-square shape to the straight-square shape, both guide pieces 7a and 7b are rotated left and right, respectively, and returned to their normal positions. Further, in the main straight ruler 1 having the above structure, at least the reference side 2 having the scales 3 on both edges is made of a magnetic material, for example, stainless steel. Furthermore, a template 6 that constitutes the bottom plate of the storage groove 5 is provided on the bottom surface of the main straight ruler 1.
Note that a protractor and the like are engraved on the template 6. Moreover, 10a and 10b are magnetic straight rulers that utilize the absorption power of magnets. The magnetic straightedges 10a and 10b have their tips oriented at predetermined angles of 45° and 60°, respectively, with respect to right-angled proximal sides 12a and 12b, respectively, and oblique sides 13a and 13b of the tips, and A scale 11 is attached to each edge.

Furthermore, the weight of the main straightedge 1 and the magnetic straightedge 10a,
The magnetic force of 10b is selectively set as appropriate so that parallel lines can be drawn stably, quickly and smoothly, for example, when parallel lines are drawn one after another. Further, the magnetic straightedges 10a and 10b can be stored in the storage groove 5 of the main straightedge 1.

(Example of use) Figure 4 A and B show how a rectangular figure that requires a center line (for example, the main projection of a bolt or shaft) is drawn using the main straight edge ruler 1 and the two magnetic straight edge rulers 10a and 10b. When drawing a circle, first draw the center line P as shown in Figure 4 A.
After drawing , magnetic straightedges 10a and 10b are placed at a predetermined distance on the left and right from the 0 index 9 of the main straightedge 1.
is fixed on the reference side 2 of the main straight ruler 1, and the line segment a
-Draw b-c-d. Then, change the position of the magnetic straight edge 10b as shown in FIG.
By subtracting d, we get quadrilaterals a, b, with center line P.
c and d are drawn.

Next, in FIGS. 5 and 6, diagonal lines of 45° and 60° are drawn in parallel one after another while sliding the main straightedge 1, magnetic straightedge 10a, and magnetic straightedge 10b, respectively.

Furthermore, Figure 7 shows the main straightedge 1 and the magnetic straightedge 10.
This is a case where a short diagonal line forming an angle of 30° to the base line Q is drawn using

(Effects of the invention) According to this invention, equally spaced parallel lines, especially parallel diagonal lines, can be drawn simply, easily and quickly. The main straight ruler 1 has a protrusion 4 and can be used as a normal drafting straight ruler using this as a knob, and also functions as a T ruler by forming a right angle guide plate A with a guide piece 7. Therefore, if the main straight edge 1 and the plurality of magnetic straight edges 10a, 10b, . . . It has outstanding effects such as being able to draw on.

Furthermore, since the magnetic straightedges 10a and 10b are used which are fixed to the main straightedge 1 by adsorption, there is no risk of the rulers slipping during line drawing and causing an unexpected failure as in the conventional case.

Moreover, since the main straight ruler 1 is provided with a storage groove 5, it is convenient to store various drafting tools and writing instruments, and the bottom plate of the storage groove 5 serves as a template 6, making the room extremely heavy.

In other words, the ruler of this invention combines various functions and benefits such as a straight edge, T-square, protractor, template, and triangular ruler, and can be used for any drawing as long as it is a figure consisting of a straight line, a small arc, or a small circle. It can be drawn easily and efficiently. It also has a function that allows you to quickly finish drafting.
In addition, even if the magnetic straightedge is moved on the drawing paper while being attracted to the main straightedge, it does not easily fall off.

[Brief explanation of the drawing]

The drawings show an embodiment of this devised magnetic ruler for drafting, in which Fig. 1 is an overall perspective view, Fig. 2 is a vertical side view of the main straight ruler, and Fig. 3 A and B show the magnetic straight ruler, respectively. 4 is a perspective view of
6 and 6 are explanatory views of an example of use in which parallel diagonal lines are drawn at 45 degrees and 60 degrees, and FIG. 7 is an explanatory view of an example in which short diagonal lines are drawn at an angle of 30 degrees with respect to the base line. 1...Main straightedge, 2...Reference side, 3...Scale,
4... Protrusion, 5... Storage groove, 6... Template, 7, 7a, 7b... Guide piece, 8... Pivot, 9
...0 index, 10a, 10b...Magnetic straightedge, 1
1... Scale, 12a, 12b... Base end side, 13
a, 13b...Tip hypotenuse, A...Right angle guide plate, P
...center line, Q...baseline.

Claims (1)

[Scope of utility model registration request] A main straight ruler 1 having a storage groove 5 in which a reference side 2 is made of a magnetic material and has at least a scale 3, a guide piece 7 which can be rotated to form a right angle guide plate A is pivotally attached to a protrusion 4 at one end. , a template 6 that constitutes the bottom plate of the storage groove 5 on the bottom surface of the main straight ruler 1, and tip oblique sides 13a, 13 whose tips are each at a predetermined angle.
b, ... A plurality of magnetic straightedges 10a, 10
A magnetic ruler for drafting consisting of b,...