KR101377365B1 - Measuring device for hexagonal structure - Google Patents

Abstract

The dimension measuring apparatus for hexagonal structures according to the present invention comprises; a first protractor fixing bar having graduations to mark lengths with a first protractor being combined on one side; a first pointer hinge-combined with the first protractor fixing bar having graduations to mark lengths and provided with the first pointer at one end to indicate graduations of the first protractor; a second protractor fixing bar hinge-combined with the second protractor fixing bar having graduations to mark lengths and provided with the second pointer at one end to indicate graduations of the second protractor; a third protractor fixing bar hinge-combined with the second protractor fixing bar having graduations to mark lengths and provided with the third pointer at one end to indicate graduations of the third protractor. The dimension measuring apparatus for hexagonal structures can measure the length of a side and the angle in the cross-section of a hexagonal structure by being combined with the outer periphery of the hexagonal structure.

Description

Measuring device for hexagonal structure

The present invention relates to a dimension measuring apparatus of a hexagonal structure, and more particularly, to a dimension measuring apparatus of a hexagonal structure that can conveniently and quickly measure the length and angle of the side on the cross-section of the hexagonal structure without several repetitive operations.

A hexagonal structure is a hexagonal structure having a rectangular cross section with eight sides, eight corners, and twelve vertices.

Honeycomb is a typical hexagon in nature. The honeycomb hexagon is the most economical structure that secures maximum space with the least amount of material, and it is also a stable structure that distributes the power in the most balanced way. This is because regular hexagonal structures have no gaps when the sides contact each other in a plane.

Of course, an equilateral triangle structure and a square structure can be pasted together without a gap, but an equilateral triangle requires a lot of materials forming a wall and a small space. Squares are easily distorted and distorted because external forces or shocks are not dispersed. However, the hollow hexagon is not only robust but also stable because external forces are easily dispersed.

In the case of circles, the shape is the maximum when the length of the perimeter is constant, and the width of each circle is the largest than other shapes.However, if several circles are connected, space between them can be used to create empty space between them. It cannot be used effectively. On the other hand, empty hexagons have very high space utilization when they are attached to one another.

Because of these unique advantages, hexagonal structures have long been the subject of study by architects, and when they are actually building sturdy structures, the hexagonal structures are often made inside. In addition, the hexagonal structure is used in various fields such as various parts and supports.

In order to analyze physical properties such as strength of the hexagonal structure, the external dimensions of the hexagonal structure must be measured. The dimension that determines the shape of the hexagon is the angle at the three vertex portions in the cross section and the length of the side that abuts these vertices.

Conventionally, in order to measure the length and angle of the sides on the cross-section of the hexagonal structure by using a straight ruler and a protractor, the angles at the lengths and vertices of each side were measured through repetitive measurement work. However, such a measuring method is cumbersome, and it is difficult to measure accurate dimensions because the measuring part is wrong during the repeated measuring process. In addition, it is difficult to measure the angle on the cross section of the hexagonal structure with a conventional protractor.

Conventional rulers and protractors have difficulty in measuring the external dimensions of three-dimensional structures such as hexagonal structures, and various devices for measuring external dimensions such as lengths and angles of sides of three-dimensional structures have been developed. For example, Korean Unexamined Patent Publication No. 2007-0000786 (published on July 10, 2007) discloses a vernier caliper capable of simultaneously measuring an angle and a length of a structure by adding an angler to a conventional vernier caliper structure. As another example, Korean Laid-Open Patent Publication No. 2012-0103319 (published on September 19, 2012) discloses an image in which the measurement light is reflected back to the measurement object by detecting the measurement object by irradiating the measurement light and different from each other. Disclosed is a surface angle measurement optical sensor that compares an image of an object detected by illumination and compares a light quantity difference with respect to a measurement point of an object corresponding to each pixel of the images, thereby deriving a surface angle with respect to the measurement point.

However, in order to measure the external dimension of the hexagonal structure with the vernier caliper disclosed in 2007-0000786, the repeated dimension measurement operation must be repeated, and the surface angle measurement optical sensor disclosed in Korean Patent Publication No. 2012-0103319 is expensive and hexagonal structure It is not effective to measure the external dimension of the.

The present invention has been made in view of this point, and an object of the present invention is to provide a dimensional measuring device of the hexagonal structure that can measure the length and angle of the side of the cross-section of the hexagonal structure conveniently and quickly without several repetitive operations.

In the hexagonal structure measuring apparatus according to the present invention for achieving the above object, a first protractor is formed on the side of the first protractor is formed with a scale indicating the slit and the length along the longitudinal direction, the first protractor formed with a scale indicating the angle A first indicator needle is fixed to the fixing bar, the first protractor is hinged to the first protractor fixing bar, and a scale indicating a slit and a length is formed along a length direction and provided with a first indicator needle at one end for indicating the scale of the first protractor. A second protractor fixing bar coupled to one side and hinged to the first protractor fixing bar, the second protractor having a scale indicating a slit and a length formed along a longitudinal direction and having a scale indicating an angle formed thereon; It is hinged to the fixed bar and a scale is formed to indicate the slit and the length along the longitudinal direction for indicating the scale of the second protractor 2 second indicator needle fixed bar provided at one end, and a third protractor formed with a scale indicating the slit and the length along the longitudinal direction and a scale indicating the angle is coupled to one side fixed to the second indicator needle Bar and hinge coupled to the third protractor fixing bar, the third protractor fixing bar and the first indicator needle fixing bar is hinged to form a slit and length along the longitudinal direction is formed to indicate the scale of the third protractor And a third indicator needle fixing bar provided at one end thereof for the third indicator needle.

At least one of the first to third protractor fixing bars and the first to third indicator needle fixing bars may include a first separating bar and a second separating bar which are detachably coupled to each other.

The first separation bar and the second separation bar may be coupled to each other by magnetic force.

The dimensional measuring device of the hexagonal structure according to the present invention is inserted into a portion where the slit of the first protractor fixing bar and the slit of the second protractor fixing bar intersect and hinge the first protractor fixing bar and the second protractor fixing bar. A second pin assembly inserted into a portion where the slit of the second indicator needle fixing bar and the slit of the third protractor fixing bar intersect to hinge hinge the second indicator needle fixing bar and the third protractor fixing bar. A third pin inserted at a portion where the pin assembly and the slit of the first indicator needle fixing bar and the slit of the third indicator needle fixing bar intersect to hinge-engage the first indicator needle fixing bar and the third indicator needle fixing bar; It may further comprise an assembly.

The first to third pin assemblies include a coupling pin, a first support member and a second support member coupled to each other to face the coupling pin, and the first support member and the second support member are coupled to each other. A non-circular body coupled to a pin and inserted into the slits, and a separation preventing part having a width greater than the width of the slits and disposed at one end of the body, wherein any one of the first support member and the second support member is provided. One or more may be rotatably coupled to the coupling pin.

Since the dimensional measuring device of the hexagonal structure according to the present invention is coupled to the outer periphery of the hexagonal structure to measure the length and angle of the sides of the hexagonal structure at one time, the hexagonal structure of the hexagonal structure through several measurement operations using a straight ruler and protractor Compared with the conventional measurement of dimensions, the measurement accuracy can be increased.

In addition, the dimensional measuring device of the hexagonal structure according to the present invention is made of a structure that can be opened to one side, it can be coupled to the length of the hexagonal structure is not difficult to measure the size without difficulty.

1 is a plan view showing a dimension measuring apparatus of the hexagonal structure according to an embodiment of the present invention.
Figure 2 shows an extract of the hinge connecting member insertion portion of the dimensional measurement apparatus of the hexagonal structure according to an embodiment of the present invention.
Figure 3 shows the pin assembly of the dimension measuring apparatus of the hexagonal structure according to an embodiment of the present invention.
Figure 4 shows the separated state of the separation unit of the dimension measuring apparatus of the hexagonal structure according to an embodiment of the present invention.
Figure 5 shows an extract of the separation portion of the dimension measuring apparatus of the hexagonal structure according to an embodiment of the present invention.
6 shows a state in which the dimension measuring apparatus of the hexagonal structure according to an embodiment of the present invention is coupled to the hexagonal structure for dimension measurement.

Hereinafter, the present invention will be described in more detail.

While the present invention has been described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. . Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

1 is a plan view showing a dimension measuring apparatus of the hexagonal structure according to an embodiment of the present invention.

As shown in Figure 1, the dimensional measuring device 10 of the hexagonal structure according to an embodiment of the present invention three protractor fixing bars 20, 40, 70 and three indicator needle fixing bar 30 60 and 80 have a structure connected to each other to form a hexagonal closed link structure. Each of the fixing bars 20, 30, 40, 60, 70, and 80 are hinged to neighboring ones, and thus, angles formed by the two fixing bars connected to each other may be variously changed.

The first protractor fixing bar 20 has a plurality of scales 21 spaced at regular intervals along the longitudinal direction to indicate the length. One end of the first protractor fixing bar 20 is formed such that an elongated slit 22 extends to an intermediate portion in the longitudinal direction, and the other end of the first protractor fixing bar 20 has a first protractor 23. It is provided. The first protractor fixing bar 20 has a fan shape, and a plurality of scales 24 indicating an angle are formed at regular intervals at the edge thereof.

The first indicator needle fixing bar 30 is hinged by the first hinge pin 26 on an end side of the first protractor fixing bar 20 provided with the first protractor 23. The first indicator needle fixing bar 30 has a plurality of scales 31 and elongated slits 32 spaced at regular intervals along the longitudinal direction to indicate the length. One end of the first indicator needle fixing bar 30 is provided with a first indicator needle 33 for indicating the scale 24 of the first protractor 23. The first protractor fixing bar 20 or the first indicator needle fixing bar 30 rotates about the first hinge pin 26 so that the first protractor fixing bar 20 and the first indicator needle fixing bar 30 are rotated. As the angle formed is different, the scale 24 of the first protractor 23 indicated by the first indicator needle 33 is different.

The first indicator needle fixing bar 30 is provided with a separating part 34 so that the first indicator needle fixing bar 30 may be separated into two parts. That is, the first indicator needle fixing bar 30 has a first separation bar 30a and a second separation bar 30b which are detachably coupled to each other. Thus, since the first indicator needle fixing bar 30 is made of a structure that can be separated, the dimension measuring device 10 of the hexagonal structure can be opened to one side through the separating portion 34 of the first indicator needle fixing bar 30. have. The opening and closing action of the dimension measuring device 10 of the hexagonal structure will be described later.

The first protractor fixing bar 20 is also hinged to the second protractor fixing bar 40. The second protractor fixing bar 40 has a plurality of scales 41 spaced at regular intervals along the longitudinal direction to indicate the length, and an elongated slit 42 formed in the longitudinal direction. A second protractor 43 is provided at one end side of the second protractor fixing bar 40. The second protractor 43 has the same structure as the first protractor fixing bar 20 described above, and has a plurality of scales 44 for displaying angles.

The first protractor fixing bar 20 and the second protractor fixing bar 40 are hinged to each other by the first pin assembly 50. The first pin assembly 50 is inserted into a portion where the slit 22 of the first protractor fixing bar 20 and the slit 42 of the second protractor fixing bar 40 cross each other, such that the first protractor fixing bar 20 is provided. And hinged second protractor fixing bar 40.

As shown in FIGS. 2 and 3, the first pin assembly 50 includes a coupling pin 51 and a first support member 52 and a second support member coupled to each other to face the coupling pin 51. 53). The first support member 52 and the second support member 53 have the same structure, and prevent the separation of the non-circular body 54 coupled to the coupling pin 51 and one end of the body 54. And a portion 55. The polygonal body 54 is inserted into each of the slits 22 and 42, and the departure preventing part 55 has a width larger than that of the slits 22 and 42 and the slits 22 and 42. ) Is placed outside. Although the body 54 is shown in the figure consisting of a rectangle, the body 54 may be formed in a shape other than circular, such as other polygons, or ovals, the width of which varies depending on the part.

When the first pin assembly 50 is inserted into a portion where the slit 22 of the first protractor fixing bar 20 and the slit 42 of the second protractor fixing bar 40 cross each other, the first supporting member 52 is provided. The departure prevention part 55 of the second protractor fixing bar 40 is disposed outside the slit 42, the departure prevention part 55 of the second support member 53 of the first protractor fixing bar 20 It is disposed outside the slit 22. Therefore, the first pin assembly 50 is not easily separated from the first protractor fixing bar 20 or the second protractor fixing bar 40. In addition, the second support member 53 lying in the body 54 of the first support member 52 lying in the slit 42 of the second protractor fixing bar 40 or in the slit 22 of the first protractor fixing bar 20. The body 54 of) may move along each slit 22, 42. As a result, the positions of the first protractor fixing bar 20 and the second protractor fixing bar 40 in the respective slits 22 and 42 may be changed.

As shown, the body 54 of the first support member 52 and the second support member 53 is rectangular and its shortest width is smaller than the width of the slits 22, 42, but the body 54. The diagonal width of is greater than the width of the slits 22, 42. In addition, any one of the first support member 52 and the second support member 53, or both the first support member 52 and the second support member 53 may rotate with respect to the coupling pin 51.

Accordingly, when the first support member 52 is rotated about the coupling pin 51, the edge portion of the body 54 of the first support member 52 is located next to the slit 42 of the second protractor fixing bar 40. It can be in close contact with the inner surface. Similarly, when the second support member 53 is rotated about the coupling pin 51, the corner portion of the body 54 of the second support member 53 is located at the side of the slit 22 of the first protractor fixing bar 20. It can be in close contact with the side. When the first pin assembly 50 is brought into close contact with the inner surface of the first protractor fixing bar 20 or the inner surface of the second protractor fixing bar 40, the first pin assembly is formed within the respective slits 22 and 42. Movement of 50 can be suppressed. That is, the first pin assembly 50 may be fixed to a specific position of the slit 22 of the first protractor fixing bar 20 or to a specific position of the slit 42 of the second protractor fixing bar 40.

Referring back to FIG. 1, a second indicator needle fixing bar 60 is hinged to the second protractor fixing bar 40 by a second hinge pin 46. The second indicator needle fixing bar 60 has a plurality of scales 61 spaced at regular intervals along the length direction to indicate the length thereof, and at one end thereof to indicate the scale 44 of the second protractor 43. The second indicator needle 63 is provided. The second protractor fixing bar 40 or the second indicator needle fixing bar 60 rotates about the second hinge pin 46 so that the second protractor fixing bar 40 and the second indicator needle fixing bar 60 are rotated. When the angle formed is different, the scale 44 of the second protractor 43 indicated by the second indicator needle 63 is also changed.

The second indicator needle fixing bar 60 is also hinged to the third protractor fixing bar 70 by the second pin assembly 57. The third protractor fixing bar 70 has a plurality of scales 71 spaced at regular intervals along the longitudinal direction to indicate the length, and an elongated slit 72 formed in the longitudinal direction. The third protractor 73 is provided at one end side of the third protractor fixing bar 70. The third protractor 73 has the same structure as the above-described first protractor fixing bar 20 and has a plurality of scales 74 for displaying angles.

The second pin assembly 57 is inserted into a portion where the slit 62 of the second indicator needle fixing bar 60 and the slit 72 of the third protractor fixing bar 70 cross each other to form a second indicator needle fixing bar ( 60 and hinged to the third protractor fixing bar (70). The second pin assembly 57 has the same structure as the first pin assembly 50 described above, and the slit 62 of the second indicator needle fixing bar 60 and the slit of the third protractor fixing bar 70. 72 can move along, but are not easily separated from these slits 62, 72. Therefore, the intersection position of the second indicator needle fixing bar 60 and the third protractor fixing bar 70 may be changed.

And similar to the operation of the first pin assembly 50 as described above, the second pin assembly 57 is also a specific position of the slit 62 of the second indicator needle fixing bar 60, or the third protractor fixing bar ( 70 may be fixed to a specific position of the slit 72. That is, the first support member 52 or the second support member 53 of the first pin assembly 50 is rotated about the coupling pin 51, and a part of the second indicator needle fixing bar 60 is rotated. By closely contacting the inner surface or the inner surface of the third protractor fixing bar 70, the movement of the second pin assembly 57 in each slit 62, 72 can be suppressed.

The third indicator needle fixing bar 80 is hinged to the third protractor fixing bar 70 by a third hinge pin 76. The third indicator needle fixing bar 80 has a plurality of scales 81 spaced apart at regular intervals along the length direction to indicate the length, and at one end thereof to indicate the scale 74 of the third protractor 73. A third indicator needle 83 is provided for. The third protractor fixing bar 70 or the third indicating needle fixing bar 80 rotates around the third hinge pin 76 so that the third protractor fixing bar 70 and the third indicating needle fixing bar 80 are rotated. When the angle formed is different, the scale 74 of the third protractor 73 indicated by the third indicator hand 83 also changes.

The third indicator needle fixing bar 80 is hinged by the first indicator needle fixing bar 30 and the third pin assembly 59 described above. The third pin assembly 59 is inserted into a portion where the slit 32 of the first indicator needle fixing bar 30 and the slit 82 of the third indicator needle fixing bar 80 cross each other, and thus the first indicator needle fixing bar 30. Hinge coupling the 30 and the third indicator fixing bar (80). The third pin assembly 59 has the same structure as the first pin assembly 50 described above, and the slit 32 of the first indicator needle fixing bar 30 and the slit of the third indicator needle fixing bar 80. It can move along 82 but is not easily separated from these slits 32 and 82. Therefore, the intersection position of the first indicator needle fixing bar 30 and the third indicator needle fixing bar 80 may be changed.

And similar to the operation of the first pin assembly 50 as described above, the third pin assembly 59 also rotates the first support member 52 or the second support member 53 about the coupling pin 51. In this way, the specific position of the slit 32 of the first indicator needle fixing bar 30 or the specific position of the slit 82 of the third indicator needle fixing bar 80 can be fixed.

Thus, the dimensional measuring device 10 of the hexagonal structure according to an embodiment of the present invention is the first protractor fixing bar 20, the first indicator needle fixing bar 30, the second protractor fixing bar 40, 2 indicator needle fixing bar 60, the third protractor fixing bar 70, the third indicator needle fixing bar 80 is connected in sequence, the third indicator needle fixing bar 80 is the third protractor fixing bar 70 And the first indicator needle fixing bar 30 form a hexagonal closed link structure. When the dimension measuring device 10 of the hexagonal structure has a fixed closed link structure, it is difficult to be coupled around the long hexagonal structure. To this end, the dimension measuring apparatus 10 of the hexagonal structure according to the present invention may be opened to one side through the separating part 34 by being provided with the separating part 34 in the first indicator needle fixing bar 30.

As shown in FIGS. 4 and 5, the first indicator needle fixing bar 30 includes a first separating bar 30a and a second separating bar 30b which are connected to each other so as to be separated from each other, and the first separating bar. The separating part 34 is provided between 30a and the 2nd separating bar 30b. A first inclined portion 30c is provided at the end of the first separating bar 30a, and a second inclined portion 30d is fitted at the end of the second separating bar 30b to be fitted and coupled to the first inclined portion 30c. do. In addition, a first connecting member inserting portion 35 is provided at the first separating bar 30a, and a second connecting member inserting portion 36 corresponding to the first connecting member inserting portion 35 is provided at the second separating bar 30b. ) Is provided. The second connection member insertion part 36 is provided at an extension part 30e provided to extend toward the first separation bar 30a at the end of the second separation bar 30b.

Insertion grooves 37 open toward each other are formed in the first connection member insertion portion 35 and the second connection member insertion portion 36, and the connection member 38 is inserted into these insertion grooves 37. When the first inclined portion 30c of the first separating bar 30a and the second inclined portion 30d of the second separating bar 30b are fitted to each other, the first connecting member inserting portion 35 and the second connecting member are combined. The insertion part 36 is joined, and the connection member 38 is fully inserted into the insertion groove 37 of these connection member insertion parts 35 and 36. At this time, the first separation bar 30a and the second separation bar 30b are connected to one. If the connecting member 38 is made of magnets and the first separation bar 30a and the second separation bar 30b are made of iron, the coupling and separation of the first separation bar 30a and the second separation bar 30b is more smooth. Can be done.

As shown in FIG. 4, after the first separating bar 30a and the second separating bar 30b are separated to open one portion of the dimensional measuring device 10 of the hexagonal structure, as shown in FIG. 6. When the circumference of the hexagonal structure 90 is wound and the first separation bar 30a and the second separation bar 30b are combined, the dimensional measuring device 10 of the hexagonal structure 90 can be easily connected to the long hexagonal structure 90. Can be combined to measure dimensions.

Then, the three protractor fixing bars 20, 40, 70 and three indicator needle fixing bars 30, 60, 80 are brought into close contact with each side on the cross-section of the hexagonal structure 90, and then fixed. The angle of the hexagonal structure 90 by checking the scales 21, 31, 41, 61, 71 and 81 provided in the bars 20, 30, 40, 60, 70 and 80. The length of the sides can be easily measured. Hexagonal structure 90 can also be identified by checking the respective scales 24, 44 and 74 indicated by the three indicator needles 33, 63 and 83 in three protractors 23, 43 and 73. The angle at the three vertices of can be easily measured. And by measuring the angle at the three vertices of the hexagonal structure 90, the angle at the remaining three vertices can be easily confirmed.

As described above, the dimensional measuring device 10 of the hexagonal structure according to the present invention is such that a plurality of fixing bars 20, 30, 40, 60, 70, 80 is in close contact with the cross-sectional side of the hexagonal structure. By arrange | positioning around the outer periphery of a hexagonal structure, the length and angle of the edge on the cross section of a hexagonal structure can be measured at once.

In addition, the dimensional measuring device 10 of the hexagonal structure according to the present invention is coupled to the outer periphery of the hexagonal structure can measure the length and angle of the side on the cross-section of the hexagonal structure at one time, using a straight ruler and a protractor Through this, the measurement accuracy can be improved as compared with the conventional measurement of the dimensions of the hexagonal structure.

In addition, the dimensional measuring device 10 of the hexagonal structure according to the present invention is made of a structure that can be opened to one side, it can be coupled to the length of the hexagonal structure is not difficult to measure the size without difficulty.

In the dimensional measuring device 10 of the hexagonal structure according to the present invention, the structure of each of the plurality of protractor fixing bar 20, 40, 70 and the plurality of indicator needle fixing bar 30, 60, 80, Their hinge coupling structure, opening structure and the like can be variously changed. For example, a protractor may be installed in the indicator needle fixing bars 30, 60 and 80, and the protractor fixing bars 20, 40 and 70 may be provided with an indicator needle. In addition, the pin assemblies 50, 57, 59 are not limited to the structure shown in the figure, but may be modified in various other structures that can hingeably couple adjacent fixing bars to each other. In addition, the separating part 34 is not provided in the first indicator needle fixing bar 30 as shown, and may be provided in other support bars 60, 80 or protractor fixing bars 20, 40, 70. Can be. In addition, the detachable coupling structure of the first separation bar 30a and the second separation bar 30b may also be changed to a structure other than the structure using the connection member 38 and the insertion groove 37 as shown.

10: measuring device of hexagonal structure 20, 40, 70: 1,2,3 protractor fixing bar
21, 24, 31, 41, 44, 61, 71, 74, 81: Scale 22, 32, 42, 62, 72, 82: Slit
23,43,73: 1st, 2nd, 3rd protractor 30a, 30b: 1st, 1st and 2nd separation bar
30c, 30d: 1st, 2nd inclined portions 33, 63, 83: 1st, 2, 3 indicator hands
34: separating part 35, 36: first and second connecting member insertion part
37: insertion groove 38: connection member
50, 57, 59: 1,2,3 pin assembly 51: coupling pin
52, 53: first and second support members 54: body
55: departure prevention unit

Claims (5)

delete A first protractor fixing bar having a scale indicating a slit and a length along a longitudinal direction, the first protractor having a scale indicating an angle formed thereon;
A first indicator needle fixing bar coupled to the first protractor fixing bar and hinged, a scale indicating a slit and a length along a longitudinal direction, and having a first indicator needle at one end for indicating the scale of the first protractor ;
A second protractor fixing bar having a slit and a length indicating a length along a length direction, the second protractor having a scale indicating an angle being coupled to one side, and a second protractor fixing bar hinged to the first protractor fixing bar;
A second indicator needle fixing bar which is coupled to the second protractor fixing bar and is hinged, and has a scale indicating a slit and a length along a length direction, and having a second indicator needle at one end for indicating the scale of the second protractor ;
A third protractor fixing bar coupled to one side of the third protractor having a scale indicating a slit and a length formed along the longitudinal direction, the third protractor having a scale indicating an angle formed therein, and hinged to the second indicator needle fixing bar; And
It is hinged to the third protractor fixing bar and the first indicator needle fixing bar, a scale for indicating the slit and the length is formed along the longitudinal direction, the third indicator needle for indicating the scale of the third protractor at one end Including; a third indicator needle fixed bar provided;
At least one of the first to third protractor fixing bar and the first to third indicator needle fixing bar includes a first separation bar and a second separation bar which are detachably coupled to each other,
A first pin assembly inserted into a portion where the slit of the first protractor fixing bar and the slit of the second protractor fixing bar intersect to hinge-engage the first protractor fixing bar and the second protractor fixing bar;
A second pin assembly inserted into a portion where the slit of the second indicator needle fixing bar and the slit of the third protractor fixing bar intersect to hinge-engage the second indicator needle fixing bar and the third protractor fixing bar; And
A third pin assembly inserted into a portion where the slit of the first indicator needle fixing bar and the slit of the third indicator needle fixing bar intersect to hinge-engage the first indicator needle fixing bar and the third indicator needle fixing bar; Including,
The first to third pin assemblies include a coupling pin, a first support member and a second support member coupled to each other to face the coupling pin,
The first support member and the second support member include a non-circular body coupled to the coupling pin and inserted into the slits, and a separation prevention part disposed at one end of the body having a width greater than the width of the slits. ,
At least one of the first support member and the second support member is a dimension measuring apparatus of the hexagonal structure, characterized in that rotatably coupled to the coupling pin. 3. The method of claim 2,
The first separation bar and the second separation bar is a dimension measuring device of the hexagonal structure, characterized in that coupled to each other by a magnetic force.
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