JPS6329591Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a universal parallel ruler equipped with scale alignment means that allows the rotation angle of the scale to be easily read.

Conventionally, there is a known method of reading the rotation angle of a scale by aligning the vernier scale on the scale side with the minute scale on the head support side. It is not always easy to read the scale, and there are problems in terms of visibility, speed, and accuracy.Recently, means for digitally displaying the rotation angle of the scale have been proposed. However, the above-mentioned digital display means requires means for A-D conversion in the relative rotation section between the head support side and the scale side, which not only requires major modification of the head but also requires a large and complicated structure. The reality is that further technological development is required in terms of practicality.

Therefore, the present invention provides a universal parallel ruler equipped with a scale means that allows the rotation angle of the scale to be easily seen and read quickly and accurately by simply adding structurally simple technical means to the conventional head part. This is what I am trying to do.

The present invention will be explained in detail with reference to examples below.
In FIG. 1, reference numeral 1 denotes a head portion of a universal parallel ruler, which is connected to a cursor 3 that moves along the longitudinal direction of a vertical rod 2 via a parallel link mechanism 4.
Reference numeral 5 denotes a head support portion that is separably connected to the parallel link mechanism 4, and rotatably supports the operating head 6. A scale mounting plate 8 rotates together with the operation head 6 via a base plate 7, and scales 9a and 9b are also rotated together with this. On the side of the head support 5, there is provided a protractor 10 with minute scales 10ae of 180° clockwise and counterclockwise. A vernier scale plate 11 having vernier scales 11a of 60' in the counterclockwise direction is provided. Conventionally, the rotation angle of the scale was read by matching the minute scales 10a and the vernier scales 11a.

Here, in the universal parallel ruler according to the present invention, as clearly shown in FIGS. 2 and 3, an extended degree scale 10b is provided outside the degree scale 10a of the protractor board 10, while a vernier scale plate 11 is provided with an extended degree scale 10b. The vernier scale 11a is provided at a position where it can overlap the extended minute scale 10b. Each vernier scale 11a is provided with a perspective scale 12 through which the extended degree scale 10b can be seen, and the structure is such that the extended degree scale 10b, which has come to an overlapping position, can be visually recognized from this perspective scale 12. It has been done. In the case of the example,
The vernier scale plate 11 is made of a thin plate made of polished glass,
A see-through scale 12 is provided with the back surface being a polished glass surface and only the scale lines of the vernier scale 11a being transparent.
In FIG. 4, the vernier scale plate 11 is fixed onto the substrate 7 with screws 14 via a support stand 13, and the vernier scale 11a at the tip is attached to the protractor 1.
Located above the extended minute scale 10b with a step of 0, the minute scale 1 on the inner circumference of the protractor 10
It is opposite to the 0a part. 15 is a cover body fixed to the board 7 with screws 16, and a vernier scale plate 11
The upper part is covered with a transparent dustproof cover 17.

In the above embodiment, the vernier scale plate 11 is made of a thin plate made of polished glass, but the point is that it is opaque and has light transmittance, and has the effect of illuminating the degree scale 10b where the vernier scale 11a overlaps. Of course, it is also possible to use an alternative product in which the transparent scale 12 is made of, for example, a translucent plastic plate, with only the scale lines of the vernier scale 11a being transparent. In addition, when the vernier scale plate 11 is composed of a thin metal plate such as stainless steel,
Since it is easily deformed due to its strength, it is difficult to drill the see-through scale 12 to the edge of the vernier scale 11a, and
When fixing to the substrate 7, it is necessary to interpose a reinforcing plate, but in the case of the vernier scale plate 11 made of polished glass or plastic of the present invention, the see-through scale 12 can be inserted along the vernier scale 11a to its edge. It has the advantage that a reinforcing plate is not particularly required when fixing as described above.
In addition, 18 is a dustproof cushion provided between the protractor board 10 and the dustproof cover 17, 19 is an index board integrated with the protractor board 10, and 20 is an index board 1.
9 is an index claw that engages with the head, and 21 is a back cover of the head portion.

According to the universal parallel ruler of the present invention having the above configuration, since the perspective scale 12 is provided on each vernier scale 11a provided superimposed on the minute scale 10b, for example, in the case of FIG. Since the indicator 0' on the vernier scale coincides with 0° on the scale, and the minute scale 10b is visible from the perspective scale 12 between 0' and 60', it can be immediately read that the rotation angle of the scale is 0°. In the case of Fig. 3, the indicator 0' of the vernier scale is located between 5° and 6° of the minute scale 10a in the counterclockwise direction, and the perspective scale 40' of the vernier scale is located in the counterclockwise direction. Since the minute scale 10b is visible from 12, it can be immediately read that the rotation angle of the scale is 5°40'. In the case of FIG. 3, the minute scale 10b is also visible from the vernier scale 60' apart from the vernier scale in the clockwise direction 20', so that alignment of the scales can be confirmed. By applying appropriate coloring, fluorescent paint, etc. to the periphery of the perspective scale 12 of the vernier scale plate, the minute scale 10b, and its surroundings, it is possible to more easily read the consistent degree scale from the perspective scale 12. Of course, it is also possible to configure it so that it can be done.

As described above, according to the universal parallel ruler according to the present invention, the extended minute scale 10b is provided on the outer circumference with a step with respect to the minute scale 10a on the inner circumference of the protractor board 10. Since the scale interval of the degree scale can be increased and the perspective scale 12 of the vernier scale is superimposed on the extended extended degree scale 10b, the size of the scale board relative to the vernier scale plate can be increased. You can widen the interval between minute scales to improve readability without
At the same time, the perspective scale 12 is changed to the minute scale 10 on its inner circumference.
Since the rotation angle of the scale can be read by aligning the perspective scale 12 with both the degree scales 10a and 10b relative to the point a, it is possible to quickly and accurately rotate the scale, thereby simplifying drafting work. This has the effect of making it efficient and smooth.

[Brief explanation of the drawing]

Figure 1 is a plan view of the universal parallel ruler according to the present invention;
Fig. 2 is an enlarged schematic plan view showing the principle of the main part, Fig. 3 is a schematic plan view of the main part enlarged and showing the principle, and Fig. 4 is a partial longitudinal section of one embodiment. FIG. 10a, 10b: Minute scale, 10: Protractor board, 1
1: Vernier scale plate, 11a: Vernier scale, 1
2: Perspective scale.

Claims (1)

[Scope of utility model registration request] Vernier scale plate 11 on the scale side that can rotate relative to the minute scale of the protractor plate 10 on the head support side
In a universal parallel ruler having a vernier scale 11a on the inner circumference of the protractor board 10, an extended degree scale 10b is provided on the outer circumference with a step with respect to the degree scale 10a on the inner circumference of the protractor plate 10. A perspective scale 12 is provided in which only the scale lines of the scale 11a are transparent, and at the same time, the perspective scale 12 is superimposed on the extended minute scale 10b provided with the step.
Both minute scales 10a, 10 are installed opposite to the minute scale 10a on the inner periphery, and the perspective scale 12 faces the minute scales 10a, 10.
A universal parallel ruler equipped with a scale alignment means that allows the rotation angle of the scale to be read by aligning with the scale.