JP7112784B1 - scale - Google Patents

Abstract

A scale capable of quickly and accurately matching a compass to a required length from the circumference is provided. In addition, the present invention provides a scale that can quickly and accurately match the drawing size to the required length with a compass when changing the sheet metal material size and in the so-called "kiku drawing", which is the end portion processing. A scale (1) has a peripheral portion (200) in which numbers (203) indicating the peripheral length are written, a reference recess (214) in which one leg of a compass is fitted, and numbers (203) indicating the peripheral length written in the peripheral portion (200) from the reference recess (214). radii 210 arranged in rows spaced apart by a radius corresponding to the perimeter indicated by , and provided with radial recesses 213 for engaging the other leg of the compass. [Selection drawing] Fig. 1

Description

The present invention relates to scales.

When working on an object, it may be necessary to drill a hole that matches the outer diameter of the object. For example, in a construction where a heat insulating material is wrapped around a pipe through which a fluid passes and a sheet metal is wrapped around it, a circular hole that matches the perimeter of the sheet metal material is drilled when performing sheet metal work on flanges and various valves at the joints of the pipes. , It is necessary to drill the sheet metal material that covers the flanges and various valves.

Conventionally, the circumference of the sheet metal material is measured with a tape measure, the circumference is divided by π to calculate the diameter, and the diameter is further divided by 2 to calculate the radius. was spreading. In addition, in "Kikushibori", which is performed in the so-called size change or end processing, where the outer diameter is changed from a thick part to a thin part, the first diameter is obtained from the circumference of the thick side, and the thin side is A second diameter is obtained from the circumference, and the width of the folding margin of "Kikushibori" is obtained by subtracting the second diameter from the first diameter and dividing it by half. Therefore, it takes too much time and effort, and there has been a demand for more efficient work, especially in the field.

In this regard, a so-called π measure has been proposed (for example, Patent Document 1). This π measure is a tape measure in which the diameter corresponding to the circumference is written in memory.

However, with this π measure, the measured diameter must be divided into two using a calculator or the like, which is time-consuming. In addition, the memory spacing marked on the π measure is π times the memory spacing of a regular ruler. Therefore, the diameter cannot be measured accurately. In addition, there are many operations using a compass, and it is troublesome to adjust the compass quickly and accurately to the calculated radius each time.

Therefore, there is a demand for a scale that can quickly and accurately match the compass to the required length from the circumference.

Utility Model Registration No. 3032622

The problem to be solved by the present invention is to provide a scale that allows the compass to be quickly and accurately adjusted to the required length from the circumference.

The present invention consists of a perimeter portion in which numbers indicating the perimeter are listed in descending order, a reference recess for matching one leg of the compass, and a length of a radius corresponding to the perimeter indicated by the number indicating the perimeter from the reference recess. and a radius portion arranged in a row with a gap therebetween and provided with a radius recess for matching the other leg of the compass.

ADVANTAGE OF THE INVENTION According to this invention, the scale which can match|combine a compass to required length rapidly and accurately from circumference can be provided.

It is a perspective view of the scale of this embodiment. FIG. 11 shows a perimeter and a radius; FIG. 10 is a diagram showing a minor perimeter and a minor radius;

A scale according to an embodiment of the present invention will be described in detail below with reference to the drawings.

(Scale composition)
FIG. 1 is a perspective view of the scale 1 of this embodiment. As shown in FIG. 1, the scale 1 includes a peripheral portion 200 in which numbers 203 (unit: mm) indicating the peripheral length are written in descending order from one longitudinal direction of the main body to the other, and one leg of the compass. The length of the radius corresponding to the perimeter indicated by the number 203 indicating the perimeter shown in the perimeter portion 200 from the reference recess 214 (hereinafter, 214A to 214D shown in FIG. 1 is referred to as the reference recess 214) and the reference recess 214 a radius 210 spaced apart and provided with a radius recess 213 for fitting the other leg of the compass. Here, the perimeter is the perimeter of the outer diameter of a pipe in which a heat insulating material and a sheet metal material are wrapped around a bare pipe. Also, the radius is the radius corresponding to this outer diameter.

The circumference part 200 is appropriately provided between the pipe type display part 201 indicating the type of pipe described in the circumference part 200 and the number 203 indicating the circumference, and is a circumference part mark that serves as a mark when reading the number 203 indicating the circumference. 202 and .

Radius 210 is provided with a plurality of reference recesses 214 for fine adjustment. The plurality of reference recesses 214 are composed of a first reference recess 214A that indicates a radius that is normally used as a reference, and a second reference that is a reference recess 214 with a radius when more play (gap) is required depending on the material of the heat insulating material. and a recess 214B to a fourth reference recess 214D.

The radius recesses 213 are arranged in rows corresponding to each of the plurality of reference recesses 214 .

Here, the intervals between the plurality of reference recesses 214 and the radius recesses 213 will be described. For example, the distance between the second reference recessed portion 214B and the radius recessed portion 213B arranged at the uppermost portion of the row corresponding to the second reference recessed portion 214B in FIG. It is the length of the radius corresponding to the circumferential length longer by 5 mm than the interval between the radial recess 213A arranged at the top and the first reference recess 214A. Similarly, in the case of the third reference recess 214C, the length of the radius corresponds to the longer peripheral length of 10 mm, and in the case of the fourth reference recess 214D, the length of the radius corresponds to the longer peripheral length of 15 mm.

These longer circumferences of 5 mm, 10 mm, and 15 mm correspond to radii when more play (clearance) is required depending on the material of the heat insulating material.

Similarly, the distance between the radial recess 213C and the third reference recess 214C and the distance between the radius recess 213D and the fourth reference recess 214D are longer than the distance between the radius recess 213A and the first reference recess 214A by 10 mm and 15 mm, respectively. is the length of the radius corresponding to the length.

Radius 210 further comprises a radius mark 212 that serves as a mark for reading radius recess 213 .

Radius 210 may further have a radius recess 215 for bare pipe whose distance from reference recess 214 is the radius of the outer diameter for each size of bare pipe. The size of the bare pipe, that is, the circumference, is determined by the standard. Therefore, the radius recess 215 for bare piping has the sizes of the piping such as "15A", "20A", and "25A" written next to it instead of the circumference.

The scale 1 may also have a minor perimeter 300 and a minor radius 310 that indicate other perimeter types.

2A and 2B are diagrams showing the perimeter portion 200 (FIG. 2A) and the radius portion 210 (FIG. 2B). As shown in FIG. 2, the pipe type display section 201 displays “cold” indicating a pipe that mainly passes a cooled fluid. In this case, the peripheral portion 200 and the radius portion 210 are provided with a number 203 and a radius recess 213 indicating the peripheral length in the case of a pipe through which mainly cooled fluid passes.

The number 203 indicating the peripheral length describes the peripheral length corresponding to the sheet metal material of the piping that mainly passes the cooled fluid, which is often used. For example, the number 203 indicating the circumference is "960", "795", "715", "635", "555", "510", "470", "425", "410", "315", " 300” and “280”.

The radius recessed portion 213 has a distance from the reference recessed portion 214 that is 960, 795, 715, 635, 555, 510, 470, and 425 of the number 203 indicating the circumference. , 410, 315, 300, and 280, respectively.

The perimeter mark 202 may be a recess, a through hole, or a mark of another shape. The perimeter marks 202 are appropriately provided at convenient positions, for example, between "960" and "795", between "635" and "555", and between "410" and "315".

The radius mark 212 may be a recess, a through hole, or other shaped mark. The radius mark 212 is located at a position corresponding to the circumference mark 202 . In the above example, the radius mark 212 is located between the radius recess 213 corresponding to "960" and the radius recess 213 corresponding to "795", and between the radius recess 213 corresponding to "635" and "555". Between the corresponding radius recesses 213, between the radius recesses 213 corresponding to "410" and the radius recesses 213 corresponding to "315", respectively.

3A and 3B are diagrams showing a minor perimeter portion 300 (FIG. 3A) and a minor radius portion 310 (FIG. 3B). As shown in FIG. 3, in the pipe type display section 301, "supply" is written to indicate the case of pipes through which fluids at room temperature are mainly passed. In this case, the circumference part 200 and the radius part 210 are provided with a numeral 303 and a radius recess 313 indicating the circumference in the case of piping through which fluid at room temperature mainly passes.

In addition, a sub perimeter mark 302 is provided on the sub perimeter section 300, and a sub radius section mark 312 is provided on the sub radius section 310, respectively.

The number 303 indicating the circumference, the sub-perimeter mark 302, and the sub-radius mark 312 are provided in the same manner as described with reference to FIG.

How to provide the radius recess 313, the reference recess 314, and the radius recess 315 for the bare pipe is indicated by the number 303 indicating the circumferential length of the distance from the reference recess 314 (the first reference recess 314A to the fourth reference recess 314D). The arrangement is the same as that explained in the explanation of FIG.

(Shape of scale)
From the standpoint of usability, it is desirable that the scale 1 has a hollow columnar shape that is a parallelogram when viewed from above, as shown in FIG. In addition to this shape, the scale 1 may have any other shape, such as a plate-like shape, a triangular shape when viewed from the top, a polygonal shape with pentagons or more, and an elliptical shape.

A plurality of sets of the peripheral portion 200 and the radius portion 210 can be provided for each type of piping, and each set includes a number 203 indicating the peripheral length for each peripheral length of the sheet metal material corresponding to the size and heat insulation thickness, the radius concave portion 213, A plurality of reference recesses 214 and radius recesses 215 for bare pipe can be provided.

(Scale material)
The material of the scale 1 is not limited as long as it is solid, such as resin such as synthetic resin, metal, cellulose such as paper and wood, glass, and ceramics.

(How to use the scale)
Scale 1 is used by the following procedure.

<When determining the cutting radius of sheet metal materials for flanges and various valves>
(1) Check the type of piping.
Select the side marked "cold" for piping that mainly carries chilled fluids, and the side marked "feed" for piping that mainly carries room temperature fluids from scale 1. .
(2) Measure the circumference of the sheet metal material of the straight pipe.
After confirming the presence or absence of fine adjustment according to the circumferential length, the reference recess 214 corresponding to the fine adjustment is selected from among the reference recesses 214 .
(3) Align one leg of the compass with the selected reference recess 214;
(4) Select the row of the radius recesses 213 corresponding to the number 203 indicating the perimeter from the perimeter, and furthermore, among the radius recesses 213 in this row, move the other leg of the compass to the radius recesses 213 in the same row as the selected reference recess 214 . match the
(5) Draw a circle on the sheet metal material with a compass and cut it out.

<When obtaining the folding margin width of "Kikushibori">
(1) Check the type of piping.
Select the side marked "cold" for piping that mainly carries chilled fluids, and the side marked "feed" for piping that mainly carries room temperature fluids from scale 1. .
(2) Measure the circumference of the sheet metal material of the straight pipe.
A number 203 indicating the circumference is selected from the circumference, and one leg of the compass is aligned with the radius recess 213 corresponding to the number 203 indicating the selected circumference.
(3) When changing the size, measure the circumference of the thin pipe sheet metal.
A number 203 indicating the circumference is selected from the circumference length, and the radius depression 213 corresponding to the number 203 indicating the selected circumference and in the same row as the radius depression 213 selected in (2) or the radius depression 215 for bare piping Align the other leg of the compass with
(4) Align the ruler with the sheet metal, align one leg of the compass with the ruler, and move the compass parallel along the ruler to draw the margin width of the "Kikushibori".

(effect of scale)
As described above, the scale 1 of the present embodiment has a peripheral portion 200 in which the numbers 203 indicating the peripheral length are written in descending order from one side of the longitudinal direction to the other, and a reference concave portion 214 for matching one leg of the compass. , and a radius recess 213 arranged in a row with a radius corresponding to the circumference indicated by the number 203 indicating the circumference written on the circumference portion 200 from the reference concave portion 214, and where the other leg of the compass is aligned. and a radius 210 that is Radius 210 may further have a radius recess 215 for bare pipe whose distance from reference recess 214 is the radius of the outer diameter for each size of bare pipe.

Therefore, according to the present invention, there is an effect that it is possible to provide a scale capable of quickly and accurately matching the compass to the required length from the circumference.

1 Scale 200 Circumferential portion 201 Piping type display portion 202 Circumferential portion mark 203 Number indicating circumferential length 210 Radius portion 212 Radius portion mark 213 Radius recess 213A Radius recess 213B Radius recess 213C Radius recess 213D Radius recess 214 Reference recess 214A First reference recess 214B Second reference concave portion 214C Third reference concave portion 214D Fourth reference concave portion 215 Radial concave portion 300 for bare pipe Subperimeter portion 301 Pipe type display portion 302 Subperimeter mark 303 Number indicating circumference 310 Subradius portion 312 Subradius portion mark 313 Radial concave portion 314 Reference recess 314A First reference recess 314B Second reference recess 314C Third reference recess 314D Fourth reference recess 315 Radial recess for bare piping

Claims (4)

a perimeter part in which numbers indicating the perimeter are written in descending order;
A reference recess for matching one leg of the compass, and a radius for matching the other leg of the compass, which is arranged in a row with a radius corresponding to the peripheral length indicated by the number indicating the peripheral length from the reference recess. a radius in which the recess is provided;
A scale with The peripheral part is
It further comprises a circumference mark that is provided between the numbers indicating the circumference and serves as a mark when reading the numbers indicating the circumference,
2. The scale according to claim 1, wherein said radius portion further comprises a radius portion mark disposed at a position corresponding to said peripheral portion mark and serving as a mark when said radius recess is read. The perimeter portion and the radius portion are
2. The scale according to claim 1, wherein a plurality of sets are provided for each type of piping. The radius portion is
2. The scale of claim 1, further comprising radial recesses for bare pipe.

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