JP7658400B2 - Measuring fixture - Google Patents

Description

The present invention relates to a measuring tool for measuring the length between circular holes located in H-beams.

Patent Document 1 discloses an actual dimension measuring device used to measure the length between two points on a set of bolts. The actual dimension measuring device disclosed in Patent Document 1 is configured in a cylindrical shape with one open end and the other closed end. The height of the actual dimension measuring device is higher than the height of any obstacles located between the set of bolts. One end of the actual dimension measuring device is placed over each of the bolts located at the measurement start point and end point, and is magnetically attached to the bolt mounting position by magnetic force. A long hole is located at the intersection of the other end face of the actual dimension measuring device and the center line of the bolt. By using a tape measure to measure the length between the long holes of the actual dimension measuring device located at the start point and end point, the length between the set of bolts can be measured while avoiding obstacles.

JP 2017-161356 A

H-beams whose strength is reinforced by stiffeners and the like are known. Stiffeners are attached to the H-beams by, for example, welding. When the H-beam is heated during welding, it expands due to heat. After welding, the thermally expanded portion of the H-beam contracts. Due to the heat expansion and contraction, welding distortion that exceeds the tolerance may occur in the H-beam. To evaluate welding distortion, the length between the circular holes in the longitudinal direction of the H-beam is measured. If the circular holes are located in the web of the H-beam, the stiffeners make it difficult to measure the length between the circular holes in a straight line. In addition, for relatively long H-beams, workers must be positioned at both ends of the H-beam.

The present invention was made in consideration of the above problems, and aims to provide a measuring tool that makes it easy to measure the length of H-shaped steel in the longitudinal direction.

(1) The measuring jig according to claim 1 is a measuring jig attached to an H-shaped steel having a first circular hole and a second circular hole located vertically apart at the longitudinal end of the web, and comprises a main body, a first convex portion protruding from the main body and insertable into the first circular hole, and a second convex portion protruding from the main body and insertable into the second circular hole, the main body being vertically apart from the first circular hole and the second circular hole, and having a first reference surface located on a first imaginary plane including the center line of the first circular hole and the center line of the second circular hole.

By inserting the first convex part into the first circular hole and the second convex part into the second circular hole, the main body does not rotate around the center line of the first circular hole or the center line of the second circular hole. In this state, the first reference surface is vertically separated from the first circular hole and the second circular hole and is located on a first imaginary plane that includes the center lines of the first circular hole and the second circular hole, so the positions of the center lines of the first circular hole and the second circular hole are determined by the first reference surface.

(2) The measuring jig according to claim 2 is the measuring jig according to claim 1, in which the main body has a first part where the first convex part and the second convex part are located, a second part where the first reference surface is located, and a third part that connects the first part and the second part, and the third part does not overlap with the first imaginary plane.

According to the above configuration, in an inserted state in which the first convex portion is inserted into the first circular hole and the second convex portion is inserted into the second circular hole, the third portion does not interfere with the portion of the H-shaped steel that is located on the first imaginary plane. As a result, in the inserted state, the reference plane can be located above or below the H-shaped steel.

(3) The measuring jig according to claim 3 is the measuring jig according to claim 2, further comprising a first magnet located in the first portion.

The first magnet keeps the first portion in contact with the web.

(4) The measuring jig according to claim 4 is the measuring jig according to claim 2 or 3, further comprising a second magnet located in the second portion.

According to the above configuration, the second magnet keeps the steel scale, etc., aligned with the reference surface.

(5) The measuring jig according to claim 5 is the measuring jig according to claim 1 or 2, in which the first convex portion has a cylindrical shape with a part of the outer circumferential surface being chamfered, and the second convex portion has a cylindrical shape with a part of the outer circumferential surface being chamfered.

The above configuration makes it easy to insert and remove the first protrusion into the first circular hole, and the second protrusion into and from the second circular hole.

(6) The measuring jig according to claim 6 further has a third convex portion protruding from the main body in the vertical direction and a fourth convex portion protruding from the main body in the vertical direction, the third convex portion being insertable into a third circular hole located in the flange of the H-shaped steel, the third convex portion being insertable into a fourth circular hole located in the flange and spaced from the third circular hole in a first direction perpendicular to the vertical direction, the main body being spaced from the third circular hole and the fourth circular hole in the vertical direction, and the measuring jig according to claim 1 having a second reference surface located in a second imaginary plane including the center line of the first circular hole and the center line of the second circular hole.

According to the above configuration, by inserting the third convex portion into the third circular hole and the fourth convex portion into the fourth circular hole, the main body does not rotate around the center line of the third circular hole or the center line of the fourth circular hole. In this state, the second reference surface is vertically separated from the third circular hole and the fourth circular hole and is located on a second imaginary plane that includes the center lines of the third circular hole and the fourth circular hole, so that the positions of the center lines of the third circular hole and the fourth circular hole are determined by the second reference surface.

(7) The measurement jig according to claim 7 is the measurement jig according to claim 6, in which the second reference surface is at a different position from the first reference surface in the vertical direction, and is at a different position from the first reference surface in the vertical direction and in a second direction perpendicular to the first direction.

(8) The measuring jig according to claim 8 is the measuring jig according to claim 7, in which the main body has a first plane on which the first convex portion and the second convex portion are located and which extends in the up-down direction and the first direction, and a second plane on which the third convex portion and the fourth convex portion are located and which extends in the first direction and the second direction.

The measuring tool of the present invention makes it easy to measure the length of an H-shaped steel beam in the longitudinal direction.

FIG. 1 is a plan view of an H-shaped steel 100 to which a measuring jig 10 according to one embodiment is attached. FIG. 2 is a top view of the H-shaped steel 100 to which the measuring jig 10 is attached. FIG. 3 is a perspective view showing the relationship between the H-shaped steel 100 and the first imaginary plane P2. FIG. 4 is a plan view of the H-shaped steel 200 to which the measuring jig 10 is attached. FIG. 5 is a top view of another example of an H-shaped steel 200 to which the measuring jig 10 is attached. FIG. 6 is a plan view of another example of an H-shaped steel 100 to which the measuring jig 10 is attached. FIG. 7 is a top view of another example of an H-shaped steel 100 to which the measuring jig 10 is attached. FIG. 8 is a perspective view showing the relationship between the H-shaped steel 100 and the second imaginary plane P3. FIG. 9 is a perspective view showing the measuring jig 10. As shown in FIG. FIG. 10 is a plan view of the measuring jig 10 with the first convex portion 21, the second convex portion 22, the third convex portion 171, and the fourth convex portion 172 removed. FIG. 11 is a side view showing the measuring jig 10. FIG. 12 is a top view showing the measuring jig 10. FIG. 13 is a plan view of the first protrusion 21. As shown in FIG. FIG. 14 is a plan view of an H-shaped steel 100 to which a measuring jig 11 according to a modified example is attached. FIG. 15 is a side view of an H-shaped steel 100 to which a measuring jig 11 according to a modified example is attached.

Below, an embodiment of the present invention will be described with reference to the drawings as appropriate. Note that the embodiment described below is merely one example of how the present invention is realized, and it goes without saying that the embodiment can be modified as appropriate without changing the gist of the present invention.

The directions related to the measuring jig 10 are given as an up-down direction 7, a front-back direction 8, and a left-right direction 9. The front-back direction 8 and the left-right direction 9 are both horizontal directions perpendicular to the up-down direction 7 and perpendicular to each other. The front-back direction 8 (an example of a first direction) is the longitudinal direction of the H-shaped steel 100, which will be described in detail later. The left-right direction 9 (an example of a second direction) is the width direction of the H-shaped steel 100. The up-down direction 7 is the height direction of the H-shaped steel 100.

The measuring jig 10 according to one embodiment will be described with reference to Figs. 1 to 13. First, the configuration of the H-shaped steel 100 for which the measuring jig 10 is used will be described.

[Configuration of H-shaped steel 100, 200]
As shown in Figures 1 and 2, the H-shaped steel 100 is made of steel, and flanges 102, 103 are connected to both ends in the up-down direction 7 of a web 101 whose main surface faces the left-right direction 9. A plurality of plate-shaped stiffeners 104 are positioned at predetermined intervals in the longitudinal direction of the H-shaped steel 100 (front-rear direction 8 in Figure 1). The stiffeners 104 are, for example, steel plates, and are welded to the flanges 102, 103 and the web 101 with their main surfaces facing the front-rear direction 8. As shown in Figures 4 and 5, the H-shaped steel 100 may have a structure in which plate-shaped gusset plates 107 are further welded to both ends in the front-rear direction 8 of the web 101.

As shown in FIG. 3, a first circular hole 105 and a second circular hole 106 penetrating in the left-right direction 9 are located at both ends of the H-shaped steel 100 in the front-rear direction 8. The first circular hole 105 and the second circular hole 106 are located apart in the up-down direction 7. A center line 153 of the first circular hole 105 extends in the left-right direction 9. A center line 154 of the second circular hole 106 extends in the left-right direction 9 below the first circular hole 105, similar to the center line 153 of the first circular hole 105. In other words, the center line 153 of the first circular hole 105 and the center line 154 of the second circular hole 106 are parallel.

4 and 5 show an H-shaped steel 200 with gusset plates 107 welded to both ends in the front-rear direction 8. The H-shaped steel 200 is used as a so-called loss beam. The gusset plate 107 has a first circular hole 108 and a second circular hole 109. The first circular hole 108 and the second circular hole 109 are located apart in the up-down direction 7. The first circular hole 108 and the second circular hole 109 are located forward of the front end of the flange 102 and rearward of the rear end. The first circular hole 108 and the second circular hole 109 are located in the gusset plate 107 at a position that does not overlap the web 101 of the H-shaped steel 100 and protrudes beyond both ends of the web 101 in the front-rear direction 8. The gusset plate 107 is welded to both sides of the web 101 in the left-right direction 9, for example. In addition, the configuration of the web 101, flanges 102, 103, and stiffener 104 in the H-shaped steel 200 is the same as that of the H-shaped steel 100.

As shown in Figures 2, 5, 7, and 8, the third circular hole 140 and the fourth circular hole 141 are located on the upper surface 112 of the flange 102, which is the upper one of the two flanges 102, 103. The third circular hole 140 and the fourth circular hole 141 are located apart in the left-right direction 9 perpendicular to the up-down direction 7. The third circular hole 140 is located, for example, at the left end of the upper surface 112 of the flange 102. The fourth circular hole 141 is located, for example, at the right end of the upper surface 112 of the flange 102. The third circular hole 140 and the fourth circular hole 141 are located in multiple locations along the front-rear direction 8 from the front end to the rear end of the upper surface 112 of the flange 102.

The center line 164 of the third circular hole 140 extends in the up-down direction 7. The center line 165 of the fourth circular hole 141 extends in the up-down direction 7, similar to the center line 164 of the third circular hole 140. In other words, the center line 164 of the third circular hole 140 and the center line 165 of the fourth circular hole 141 are parallel.

[Configuration of measuring jig 10]
The measuring jig 10 is a jig that is attached to the H-shaped steel 100, 200. As shown in Figures 1, 2, 4 and 5, the measuring jig 10 is attached to the first circular hole 105 and the second circular hole 106 of the H-shaped steel 100. Also, as shown in Figures 6 and 7, the measuring jig 10 is attached to the third circular hole 140 and the fourth circular hole 141 of the H-shaped steel 100. Also, the measuring jig 10 is attached to the first circular hole 108 and the second circular hole 109 of the H-shaped steel 200. For example, two measuring jigs 10 are used.

As shown in Figures 1, 4, and 6, the measuring tool 10F attached to the front end of the H-shaped steel 100, 200 and the measuring tool 10R attached to the rear end of the H-shaped steel 100, 200 extend in the up-down direction 7 and the left-right direction 9, and are mirror-symmetrical on a symmetry plane (not shown) located between the pair of measuring tools 10F, 10R in the front-rear direction 8. The H-shaped steel 100, 200 is also mirror-symmetrical on a symmetry plane (not shown). In the following description, unless otherwise specified, the configuration of the measuring tool 10F attached to the front end of the H-shaped steel 100 will be described as the measuring tool 10, and the configuration of the measuring tool 10R attached to the rear end of the H-shaped steel 100 will be omitted.

As shown in Figures 9 to 12, the measuring jig 10 includes a main body 20, a first convex portion 21, a second convex portion 22, a third convex portion 171, a fourth convex portion 172, a first magnet 23, a second magnet 24, a third magnet 25, and a fourth magnet 173.

[Main body 20]
The main body 20 is, for example, a metal plate. The outer shape of the main body 20 in a plan view is a substantially rectangular shape that is long in the vertical direction 7. The main body 20 includes a first portion 121, a second portion 122, a third portion 123, a fourth portion 129, a first reference surface 124, and a second reference surface 130. In addition, a long hole 125 that extends in the vertical direction 7 and penetrates the main body 20 in the horizontal direction 9 is located at the front end of the main body 20. The portion between the front end surface 193 of the long hole 125 and the front end surface 194 of the main body 20 (the first portion 121 and the third portion 123) functions as a gripping portion 80 that is gripped when the worker attaches the measuring jig 10 to the H-shaped steel 100. That is, the long hole 125 functions as a hole through which the worker's finger passes.

[Part 1 121]
The first portion 121 is a portion located on the lower end side of the main body 20. A length L1 (see FIG. 10) of the first portion 121 in the up-down direction 7 is shorter than a length LH1 (see FIG. 3) of the web 101 in the up-down direction 7 (L1<LH1).

10, the first portion 121 includes a first through hole 126 and a second through hole 127. The first through hole 126 and the second through hole 127 are both circular holes and penetrate the first portion 121 along the left-right direction 9. The first through hole 126 and the second through hole 127 are located at the rear end of the first portion 121. The first through hole 126 and the second through hole 127 are aligned in the up-down direction 7. The first through hole 126 is located above the second through hole 127. The length L2 between the center line 162 (see FIGS. 9 to 12) of the first through hole 126 and the center line 163 of the second through hole 127 is the same as the length LH2 between the center line 153 of the first circular hole 105 (see FIG. 3) and the center line 154 of the second circular hole 106 (L2=LH2).

The length L3 between the center line 162 of the first through hole 126 and the front end 180 of the first portion 121 is greater than the length LH3 between the center line 153 of the first circular hole 105 and the front end 190 of the H-shaped steel 100 (L3>LH3). In this embodiment, the length between the center line 163 of the second through hole 127 and the front end 180 of the first portion 121 is the same as the length L3. The length between the center line 154 of the second circular hole 106 and the front end 190 of the H-shaped steel 100 is the same as the length LH3.

The length L11 between the center line 162 of the first through hole 126 and the upper end 181 of the first portion 121 is smaller than the length LH11 between the center line 153 of the first circular hole 105 and the lower surface 113 of the flange 102 (L11 < LH11). A female thread is formed on the inner circumferential surface of the first through hole 126 and the inner circumferential surface of the second through hole 127.

[Part 2 122]
The second part 122 is a part located at the upper end of the main body 20. The upper part of the second part 122 extends rearward in the front-rear direction 8 from the front end (front end surface 187), and the rear end extends downward in the up-down direction 7. At the rear end extending downward, a first reference surface 124 facing forward and a rear end surface 136 facing rearward are located. The length L4 of the second part 122 in the front-rear direction 8 is greater than the length LH3 from the center line 153 of the first circular hole 105 to the front end 190 of the H-shaped steel 100 (L4>LH3). The length L5 in the up-down direction 7 from the lower end 183 of the bent part of the second part 122 to the center line 162 of the first through hole 126 is greater than the length LH5 in the up-down direction 7 from the center line 153 of the first circular hole 105 to the upper surface 112 of the flange 102 located above (L5>LH5). In this embodiment, the length from the center line 154 of the second circular hole 106 to the front end 190 of the H-shaped steel 100 is the same as the length LH3.

[Part 3 123]
The third portion 123 is located between the first portion 121 and the second portion 122 in the up-down direction 7 of the main body 20. The third portion 123 connects an upper end of the first portion 121 and a lower end of the second portion 122. A length L6 of the third portion 123 in the front-rear direction 8 is smaller than a length L7 of the first portion 121 in the front-rear direction 8 (L6<L7). The length L6 of the third portion 123 in the front-rear direction 8 is smaller than a length L8 in the front-rear direction 8 from a first reference plane 124 of a bent portion of the second portion 122 to a front end 184 of the third portion 123 (L6<L8). A length L13 in the front-rear direction 8 from a rear end 192 of the third portion 123 to a first reference plane 124 of the bent portion of the second portion 122 is greater than a length LH3 in the front-rear direction 8 from a center line 153 of the first circular hole 105 (center line 154 of the second circular hole 106) to a front end 190 of the H-shaped steel 100 (L13>LH3). A length L9 in the up-down direction 7 of the third portion 123 is greater than a length L10 from a lower end 183 of the bent portion of the second portion 122 to an upper end 181 of the first portion 121 (L9>L10).

The front end surface 185 of the third portion 123 (see Figures 9 and 10) is flush with the front end surface 186 of the first portion 121 and the front end surface 187 of the second portion 122. The rear end surface 155 of the third portion 123 is located forward of the rear end surface 137 of the first portion 121 and the rear end surface 136 of the second portion 122. In other words, the main body 20 is formed with a recess 135 recessed from the rear to the front at the position of the third portion 123.

[Part 4-129]
The fourth part 129 is two plates. The fourth part 129 is connected to the first part 121. One of the fourth parts 129 is connected to the lower end and front end position of the left surface of the first part 121. The other of the fourth part 129 is connected to the lower end and front end position of the right surface of the first part 121. The outer shape of the fourth part 129 as viewed from the vertical direction 7 is a convex shape whose width decreases in the direction away from the first part 121. The lower surface 142 (an example of a second plane) of the fourth part 129 is a plane that extends in the front-rear direction 8 and the left-right direction 9, and is the same plane as the lower end surface 139 (see FIG. 6) of the first part 121. One of the fourth parts 129 has a third through hole 131 that penetrates in the vertical direction 7 and has a female thread formed on its inner circumferential surface (see FIGS. 10 and 11). The other of the fourth part 129 has a fourth through hole 132 that penetrates in the vertical direction 7 and has a female thread formed on its inner circumferential surface. The length L12 in the left-right direction 9 between the center line 157 of the third through hole 131 and the center line 158 of the fourth through hole 132 is the same as the length LH12 between the center line 164 of the third circular hole 140 and the center line 165 of the fourth circular hole 141 (see Figure 8) (L12 = LH12).

[First reference plane 124]
As shown in Figures 9 and 10, the first reference surface 124 is located at the rear end of the second part 122. The first reference surface 124 is a surface of the rear end of the second part 122 facing forward. When the measuring jig 10 is attached to the H-shaped steel 100, the first reference surface 124 is located on a first imaginary plane P2 including the center line 153 of the first circular hole 105 and the center line 154 of the second circular hole 106, as shown in Figures 1 and 3. That is, in the front-rear direction 8, the position of the first reference surface 124 is the same as the position of the center line 153 of the first circular hole 105 and the position of the center line 154 of the second circular hole 106. When the measuring jig 10 is attached to the H-shaped steel 100, the first reference surface 124 is located above the flange 102 of the H-shaped steel 100. That is, a lower end 188 (see FIG. 10 ) of the first reference surface 124 is located higher than an upper end 181 of the first portion 121. The first reference surface 124 is located rearward of the third portion 123 in the front-rear direction 8, and faces a rear end surface 155 (see FIG. 9 and FIG. 10 ) of the third portion 123.

[Second reference plane 130]
As shown in Figures 9 and 10, the second reference surface 130 is located at the bottom of the first part 121. The second reference surface 130 is, for example, a surface facing forward among the inner circumferential surfaces of the slit-shaped fifth through hole 134 that penetrates the first part 121 in the left-right direction 9 and extends in the up-down direction 7. When the measuring jig 10 is attached to the H-shaped steel 100, the second reference surface 130 is located on a second imaginary plane P3 including the center line 164 of the third circular hole 140 and the center line 165 of the fourth circular hole 141, as shown in Figure 8. That is, in the front-rear direction 8, the position of the second reference surface 130 is the same as the position of the center line 164 of the third circular hole 140 and the position of the center line 165 of the fourth circular hole 141. When the measuring jig 10 is attached to the H-shaped steel 100, the second reference surface 130 is located above the upper surface 112 of the flange 102 of the H-shaped steel 100. The second reference surface 130 is located forward of the first through hole 126 and the second through hole 127 in the front-rear direction 8. The second reference surface 130 is located below the long hole 125 in the up-down direction 7. The second reference surface 130 is located below the first magnet 23 and the second magnet 24.

[First convex portion 21 and second convex portion 22]
9, 11, and 12, the first convex portion 21 and the second convex portion 22 protrude leftward from one main surface (an example of a first plane) facing left among the main surfaces of the first portion 121 extending in the up-down direction 7 and the front-rear direction 8. In the measuring jig 10R attached to the rear end of the H-shaped steel 100, the first convex portion 21 and the second convex portion 22 protrude rightward from one main surface (an example of a first plane) facing rightward of the first portion 121. The first convex portion 21 and the second convex portion 22 are positioned side by side in the up-down direction 7. The first convex portion 21 includes a shaft portion 30 and a head portion 31.

The first convex portion 21 and the second convex portion 22 are metallic hexagon socket bolts. The first convex portion 21 is located above the second convex portion 22. The first convex portion 21 can be attached to and detached from the first portion 121 by screwing into the first through hole 126. The second convex portion 22 can be attached to and detached from the first portion 121 by screwing into the second through hole 127. The first convex portion 21 and the second convex portion 22 have the same shape, and the first convex portion 21 will be described below as an example.

[Shaft portion 30]
11 , the shaft portion 30 is a cylindrical rod body that extends along the left-right direction 9. The diameter of the shaft portion 30 is the same as the diameter of the first through hole 126. A male screw is formed on the outer circumferential surface of the shaft portion 30.

[Head 31]
As shown in Fig. 13, the head 31 of the first convex portion 21 has a cylindrical shape with a part of the outer circumferential surface chamfered. Specifically, a part of the circumferential direction of the head 31 is chamfered along the height direction. In this embodiment, the head 31 is chamfered at two places so as to be symmetrical in a plan view. As a result, the head 31 of the first convex portion 21 has exposed surfaces 143 and 144 with a rectangular outer shape in a plan view. The other of the bottom surfaces of the head 31 has a groove 156 with a hexagonal outer shape in a plan view, into which a hexagonal bolt (not shown) can be inserted. The diameter r1 of the head 31 is the same as or smaller than the diameter rH1 of the first circular hole 105 (second circular hole 106) (r1 <= rH1).

[Third convex portion 171 and fourth convex portion 172]
The third convex portion 171 and the fourth convex portion 172 protrude from each of the fourth portions 129. The third convex portion 171 protrudes from one side of the fourth portion 129, and the fourth convex portion 172 protrudes from the other side of the fourth portion 129. The third convex portion 171 and the fourth convex portion 172 protrude downward from the lower surface of each of the fourth portions 129. The third convex portion 171 and the fourth convex portion 172 are aligned in the left-right direction 9. The third convex portion 171 is located to the left of the fourth convex portion 172.

The third convex portion 171 and the fourth convex portion 172 are metal hexagonal bolts. The third convex portion 171 can be attached to and detached from the first portion 121 by screwing into the third through hole 131. The fourth convex portion 172 can be attached to and detached from the second portion 122 by screwing into the fourth through hole 132. The shapes of the third convex portion 171 and the fourth convex portion 172 are similar to those of the first convex portion 21 and the second convex portion 22, and a description thereof will be omitted in this embodiment.

[First magnet 23 and second magnet 24]
1, 4, and 9 to 11, the first magnet 23 and the second magnet 24 are permanent magnets having a circular outer shape when viewed from the left-right direction 9. The first magnet 23 and the second magnet 24 are exposed to a first plane 128 of the first part 121. The first magnet 23 and the second magnet 24 are located between the first through hole 126 and the second through hole 127 in the up-down direction 7. The first magnet 23 is located above the second magnet 24 in the up-down direction 7.

[Third magnet 25]
6 and 9 to 11 , the third magnet 25 is a permanent magnet that has a circular outer shape when viewed from the left-right direction 9. The third magnet 25 is embedded in the second part 122. The third magnet 25 is exposed to the first plane 128. The third magnet 25 is located behind the first reference surface 124 in the front-rear direction 8, and at least partially overlaps with the first reference surface 124 in the up-down direction 7.

(First usage mode of measuring jig 10)
A first usage mode of the measuring jig 10 will be described. In the first usage mode, as shown in Figures 1 and 2, the length between the first circular holes 105 located at both ends of the web 101 in the longitudinal direction is measured. The length between the two first circular holes 105 is the same as the length between the two second circular holes 106.

A pair of measuring jigs 10F, which is attached to the front end of the H-shaped steel 100, and 10R, which is attached to the rear end of the H-shaped steel 100, are prepared. In measuring jig 10F, the first convex portion 21 and the second convex portion 22 protrude from the first plane 128 facing left of the first part 121. In measuring jig 10R, the first convex portion 21 and the second convex portion 22 protrude from the first plane 128 facing right of the first part 121.

The measuring jig 10F is lifted by the operator by gripping the gripping portion 80. With the first convex portion 21 and the second convex portion 22 of the measuring jig 10F aligned with the first circular hole 105 and the second circular hole 106 from the right of the front end of the H-shaped steel 100, the measuring jig 10F is brought close to the right side of the web 101. The first convex portion 21 of the measuring jig 10F is inserted into the first circular hole 105 from the right. The second convex portion 22 of the measuring jig 10F is inserted into the second circular hole 106 from the right. The first magnet 23 and the second magnet 24 are attracted to the right side of the web 101 by magnetic force. As a result, the measuring jig 10F is attached to the front end of the H-shaped steel 100. When the measuring jig 10F is attached to the H-shaped steel 100, the front end 189 (see FIG. 1) of the flange 102 fits into the recess 135. Therefore, the measuring jig 10F attached to the H-shaped steel 100 does not come into contact with the flange 102.

The measuring jig 10R is also lifted by the operator by gripping the gripping portion 80. With the first convex portion 21 and the second convex portion 22 of the measuring jig 10R aligned with the positions of the first circular hole 105 and the second circular hole 106 from the right of the rear end of the H-shaped steel 100, the measuring jig 10R is brought close to the right side of the web 101. The first convex portion 21 of the measuring jig 10R is inserted into the first circular hole 105 from the right. The second convex portion 22 of the measuring jig 10R is inserted into the second circular hole 106 from the right. The first magnet 23 and the second magnet 24 are attracted to the right side of the web 101 by magnetic force. As a result, the measuring jig 10R is attached to the rear end of the H-shaped steel 100. When the measuring jig 10R is attached to the H-shaped steel 100, the rear end 191 (see FIG. 1) of the flange 102 fits into the recess 135. Therefore, the measuring jig 10R attached to the H-shaped steel 100 does not come into contact with the flange 102.

Next, a steel tape measure 160 having an L-shaped metal tip is prepared (see FIG. 1). The tip of the tape measure 160 is pulled out from a case (not shown) and engaged with the first reference surface 124 from one side in the left-right direction 9. By bringing the tape measure 160 adjacent to the left side of the third part 123, the tape measure 160 is attracted to the third magnet 25 and maintained in contact with the left side of the third part 123. As a result, the markings on the tape measure 160 face one side in the left-right direction 9. The worker moves the case (not shown) of the tape measure 160 backwards, causing the tape measure 160 to be pulled out of the case.

The tape measure 160 is pulled out in the front-to-rear direction 8 to a position beyond the first reference surface 124 of the measuring jig 10R. The pulled out tape measure 160 comes into contact with the left end of the first reference surface 124 of the measuring jig 10R (see FIG. 2). The worker reads the scale at the left end position of the first reference surface 124 of the measuring jig 10R from either the left-to-right direction 9, thereby measuring the length between the first circular holes 105 located at both ends of the H-shaped steel 100.

(Second usage mode of the measuring jig 10)
Next, a description will be given of a second usage mode of the measuring jig 10. In the second usage mode, as shown in Figures 4 and 5, the length between the first circular holes 108 of the gusset plates 107 at both ends of the web 101 in the longitudinal direction is measured.

First, a pair of measuring jigs 10F to be attached to the front end of the H-shaped steel 200 and 10R to be attached to the rear end of the H-shaped steel 200 are prepared. The measuring jig 10F is lifted by the operator by gripping the gripping portion 80. The measuring jig 10F is brought close to the right surface of the gusset plate 107 with the first convex portion 21 and the second convex portion 22 of the measuring jig 10F aligned with the positions of the first circular hole 108 and the second circular hole 109 from the right side of the front end of the H-shaped steel 200. The first convex portion 21 of the measuring jig 10F is inserted into the first circular hole 108 from the right. The second convex portion 22 of the measuring jig 10F is inserted into the second circular hole 109 from the right. The first magnet 23 and the second magnet 24 are attracted to the right surface of the gusset plate 107 located on the right side by magnetic force. This allows the measuring jig 10F to be attached to the front end of the H-shaped steel 200.

The measuring jig 10R is also lifted by the operator by gripping the gripping portion 80. With the first convex portion 21 and the second convex portion 22 of the measuring jig 10R aligned with the first circular hole 108 and the second circular hole 109 from the right of the rear end of the H-shaped steel 200, the measuring jig 10R is brought close to the right side of the gusset plate 107. The first convex portion 21 of the measuring jig 10R is inserted into the first circular hole 108 from the right. The second convex portion 22 of the measuring jig 10R is inserted into the second circular hole 109 from the right. The first magnet 23 and the second magnet 24 are attracted to the right side of the gusset plate 107 located to the right by magnetic force. As a result, the measuring jig 10R is attached to the rear end of the H-shaped steel 100.

Next, a steel tape measure 160 having an L-shaped tip fitting is prepared (see FIG. 4). The tip of the tape measure 160 is pulled out from a case (not shown) and engaged with the first reference surface 124 from one of the left and right directions 9. By bringing the tape measure 160 adjacent to the left side of the third part 123, the tape measure 160 is attracted to the third magnet 25 and maintained in contact with the left side of the third part 123. The worker moves the case (not shown) of the tape measure 160 backwards, causing the tape measure 160 to be pulled out of the case.

The tape measure 160 is pulled out in the front-to-rear direction 8 to a position beyond the first reference surface 124 of the measuring jig 10R. The pulled out tape measure 160 is brought into contact with the left end of the first reference surface 124 of the measuring jig 10R. The worker reads the scale at the left end position of the first reference surface 124 of the measuring jig 10R from either the left-to-right direction 9, thereby measuring the length between the first circular holes 108 located at both ends of the H-shaped steel 200.

(Third usage mode of the measuring jig 10)
Next, a description will be given of a third usage mode of the measuring jig 10. In the third usage mode, as shown in Fig. 6 and Fig. 7, the measuring jig 10 is used to measure the length between the third circular holes 140 (fourth circular holes 141) located on the upper surface 112 of the flanges 102 in the longitudinal direction of the H-shaped steel 100.

First, a pair of measuring jigs 10F to be attached to the front end of the H-shaped steel 100 and 10R to be attached to the rear end of the H-shaped steel 100 are prepared. Both measuring jigs 10F and 10R are measuring jigs 10 in which the third convex portion 171 and the fourth convex portion 172 are screwed into the third through hole 131 and the fourth through hole 132 on the underside 142 of the fourth part 129.

The measuring jig 10F is lifted by an operator by gripping the gripping portion 80. With the third convex portion 171 and the fourth convex portion 172 of the measuring jig 10F aligned with the third circular hole 140 and the fourth circular hole 141 from above the front end of the H-shaped steel 100, the measuring jig 10F is brought close to the top surface 112 of the upper flange 102. The third convex portion 171 of the measuring jig 10F is inserted into the third circular hole 140 from above. The fourth convex portion 172 of the measuring jig 10F is inserted into the fourth circular hole 141 from above. In this way, the measuring jig 10F is attached to the front end of the H-shaped steel 100.

The measuring jig 10R is also lifted by the worker by gripping the gripping portion 80. The third convex portion 171 and the fourth convex portion 172 of the measuring jig 10R are aligned with the third circular hole 140 and the fourth circular hole 141 from above the rear end of the H-shaped steel 100, and the measuring jig 10R is brought close to the upper surface 112 of the upper flange 102. The third convex portion 171 of the measuring jig 10R is inserted into the third circular hole 140 from above. The fourth convex portion 172 of the measuring jig 10R is inserted into the fourth circular hole 141 from above. In this way, the measuring jig 10R is attached to the rear end of the H-shaped steel 100.

Next, a steel tape measure 160 having an L-shaped tip fitting is prepared (see FIG. 6). The tip of the tape measure 160 is pulled out from a case (not shown) and engaged with the second reference surface 130 from one side of the left-right direction 9 (e.g., the left side) (see FIG. 7). By placing the tape measure 160 adjacent to the left side of the first part 121, the tape measure 160 is attracted to the fourth magnet 173 and maintained in contact with the left side of the first part 121. The worker moves the case (not shown) of the tape measure 160 backwards, causing the tape measure 160 to be pulled out of the case.

The tape measure 160 is pulled out in the front-rear direction 8 to a position beyond the second reference surface 130 of the measuring jig 10R. The pulled out tape measure 160 is positioned along the position of the second reference surface 130 of the measuring jig 10R. The tape measure 160 is attracted to the fourth magnet 173 and maintained in contact with the left surface of the first part 121 of the measuring jig 10R. The worker reads the scale of the tape measure 160 on the second reference surface 130 of the measuring jig 10R from one of the left-right directions 9, thereby measuring the longitudinal length between the third circular hole 140 and the fourth circular hole 141 located at both ends of the H-shaped steel 100.

[Functions and Effects of the Measuring Tool 10 According to the Embodiment]
By inserting the first convex portion 21 into the first circular hole 105 and the second convex portion 22 into the second circular hole 106, the main body 20 does not rotate around the center line 153 of the first circular hole 105 or around the center line 154 of the second circular hole 106. In this state, the first reference surface 124 is separated from the first circular hole 105 and the second circular hole 106 in the up-down direction 7 and is located on a first imaginary plane P2 including the center line 153 of the first circular hole 105 and the center line 154 of the second circular hole 106, so that the positions of the center line 153 of the first circular hole 105 and the center line 154 of the second circular hole 106 are determined by the first reference surface 124. The length between the first reference surfaces 124 of a pair of measuring jigs 10 attached to both ends of the H-shaped steel 100 is equal to the length between the center lines 153 of the first circular holes 105 or the length between the center lines 154 of the second circular holes 106 in the longitudinal direction of the H-shaped steel 100. By measuring the length between the first reference surfaces 124, measurement can be performed without being affected by the presence or absence of obstacles on the H-shaped steel 100, thereby improving measurement accuracy. In addition, the length between the first reference surface of the measuring jig 10F and the first reference surface 124 of the measuring jig 10R fixed to the H-shaped steel can be directly measured, making measurement easier.

In addition, in the above embodiment, when the measuring jig 10 is brought closer to the right side of the web 101, the positions of the first convex portion 21 and the second convex portion 22 are surrounded by the web 101, the flange 102, and the first portion 121 and are difficult to see. On the other hand, the first reference surface 124 located above the flange 102 is visible. The visible first reference surface 124 is easy to align with the center line 153 of the first circular hole 105 (center line 154 of the second circular hole 106) in the front-rear direction 8. By aligning the first reference surface 124 with the center line 153 of the first circular hole 105 (center line 154 of the second circular hole 106) in the front-rear direction 8, the positions of the first convex portion 21 (second convex portion 22) and the first circular hole 105 (second circular hole 106) in the front-rear direction 8 can be aligned. Therefore, even in situations where the first convex portion 21 and the second convex portion 22 are difficult to see, they can be easily aligned with the first circular hole 105 and the second circular hole 106.

In an inserted state in which the first convex portion 21 is inserted into the first circular hole 105 and the second convex portion 22 is inserted into the second circular hole 106, the third portion 123 does not interfere with the portion of the H-shaped steel 100 that is located on the first imaginary plane P2. This allows the first reference surface 124 to be positioned above the H-shaped steel 100 in the inserted state.

The first magnet 23 keeps the first portion 121 in contact with the web 101.

The second magnet 24 keeps the steel tape measure 160 aligned with the first reference surface 124.

The first protrusion 21 can be easily inserted and removed into the first circular hole 105, and the second protrusion 22 can be easily inserted and removed into the second circular hole 106.

By inserting the third convex portion 171 into the third circular hole 140 and the fourth convex portion 172 into the fourth circular hole 141, the main body 20 does not rotate around the center line 164 of the third circular hole 140 or the center line 165 of the fourth circular hole 141. In this state, the second reference surface 130 is separated from the third circular hole 140 and the fourth circular hole 141 in the vertical direction 7 and is located on a second imaginary plane P3 that includes the center line 164 of the third circular hole 140 and the center line 165 of the fourth circular hole 141, so that the positions of the center line 164 of the third circular hole 140 and the center line 165 of the fourth circular hole 141 are determined by the second reference surface 130. The length between the second reference surfaces 130 of a pair of measuring jigs 10 attached to both ends of the H-shaped steel 100 is equal to the length between the third circular hole 140 and the fourth circular hole 141 to which the measuring jigs 10F and 10R are attached. By measuring the length between the second reference surfaces 130, it is possible to improve the measurement accuracy without being affected by the presence or absence of obstacles on the H-shaped steel 100 or the smoothness of the upper surface 112 of the flange 102. In addition, since it is only necessary to measure the length between the second reference surfaces 130, the measurement can be made easier.

The second reference surface 130 is located below the first magnet 23 and the second magnet 24. This allows the engagement position of the tape measure 160 to be closer to the third convex portion 171 and the fourth convex portion 172. Therefore, when the tape measure 160 is extended, the measuring jig 10 can be stabilized in a state where it is attached to the H-shaped steel 100.

(Modification)
In the above embodiment, the measuring jig 10 has the fourth portion 129, the third convex portion 171, the fourth convex portion 172, the second reference surface 130, and the fourth magnet 173, but is not limited to this. The measuring jig 10 does not have to have the fourth portion 129, the third convex portion 171, the fourth convex portion 172, the second reference surface 130, and the fourth magnet 173. In other words, the measuring jig 10 may be a dedicated product capable of measuring the length in the longitudinal direction between the first circular holes 105 (the second circular holes 106).

In the above embodiment, the first convex portion 21 and the second convex portion 22 protrude from the first plane 128 of the first portion 121, but this is not limited to this. As shown in Figs. 14 and 15, the first portion 91 of the measuring jig 11 may have a main surface facing the front-rear direction 8. The side surface facing left of the first portion 91 may be the first plane 146, and the first convex portion 21 and the second convex portion 22 may protrude leftward from the first plane 146 of the first portion 91. The third portion 93 may extend in the left-right direction 9, and one main surface facing forward at the left end may be the first reference surface 145. The one main surface facing forward at the left end is located at the same position as the center line 153 of the first circular hole 105 and the center line 154 of the second circular hole 106 in the front-rear direction 8. The third part 93 may connect the upper right end of the first part 91 to the upper right end of the second part 92 to the right of the flange 102 of the H-shaped steel 100. This allows the measuring jig 11 to be attached to the H-shaped steel 100 from the right side of the H-shaped steel 100 to measure the length. At this time, the first magnet 23 and the second magnet 24 may be exposed on the left side surface (first plane 146) of the first part 91. The third magnet 25 may be located on the left end surface of the second part 92.

In addition, in the above embodiment, the measuring jig 10F is attached to the left end of the H-shaped steel 100, and the measuring jig 10R is attached to the right end of the H-shaped steel 100, but this is not limited to the above. The measuring jig 10R may be attached to the left end of the H-shaped steel 100, and the measuring jig 10F may be attached to the right end of the H-shaped steel 100. In this case, the measuring jig 10R is attached to the front end of the H-shaped steel 100 from the left side of the H-shaped steel 100. The measuring jig 10F is attached to the rear end of the H-shaped steel 100 from the left side of the H-shaped steel 100. In other words, the first plane 128 may be the right surface, which is the opposite to that in the first embodiment.

In the above embodiment, the thickness of the first part 121 in the left-right direction 9 may be greater than the thickness between the right end of the flange 102 of the H-shaped steel 100 and the right surface of the web 101. In this case, the third part 123 may be omitted, and the lower end of the second part 122 may be connected to the upper right end of the first part 121. The third part 123 may be a rectangular plate. The first reference surface 124 may be the rear end surface of a slit or groove recessed from the surface of the third part 123 along the thickness direction and the up-down direction 7 of the third part 123.

In the above embodiment, the main body 20 is not limited to a plate, and may be a rod. The rod-shaped main body 20 may extend in the vertical direction 7 so as to intersect with the center lines of the first circular hole 105 and the second circular hole 106 of the H-shaped steel 100, and the upper end may be bent into a substantially U-shape to match the outer peripheral surface of the flange 102 of the H-shaped steel 100. The upper tip of the main body 20 may be bent downward, and the surface facing forward may be the first reference surface 124.

In addition, in the above embodiment, the rear end of the second section 122 is bent downward, but this is not limited to this. The rear end of the second section 122 may be bent upward, for example. This makes it easier to engage the tape measure 160 with the first reference surface 124.

In the above embodiment, the second part 122 is located above the H-shaped steel 100, but this is not limited to this. The second part 122 may be located below the H-shaped steel 100. That is, the third part 123 may connect the lower end of the first part 121 to the second part 122. The second part 122 is not limited to the top and bottom of the H-shaped steel 100, but may extend to the left or right in the front-to-rear direction 8. The first reference surface 124 is on the first imaginary plane P2 and may be located anywhere as long as it does not physically interfere with the H-shaped steel 100.

In the above embodiment, the second portion 122 may have a rectangular shape in a plan view, and one main surface may have a marking indicating the position of the first reference surface 124. The tip of the tape measure 160 is aligned with the position of the marking, and the tape measure 160 is attracted to the measuring jig 10 by the third magnet 25, so that the longitudinal length of the first circular hole 105 and the second circular hole 106 of the H-shaped steel 100 can be easily measured.

In addition, in the above embodiment, the first magnet 23, the second magnet 24, and the third magnet 25 each have one main surface facing left exposed, but this is not limited to this. As long as the first magnet 23, the second magnet 24, and the third magnet 25 can be fixed to the main body 20, both the left and right main surfaces may be exposed from the main body 20. This allows the measurement jig 10F and the measurement jig 10R to be configured appropriately by arbitrarily attaching the first convex portion 21 and the second convex portion 22 to either the left or right surface 9 of the first part 121.

In the above embodiment, the first magnet 23, the second magnet 24, and the third magnet 25 have been described as examples, but the present invention is not limited to this. The first magnet 23, the second magnet 24, and the third magnet 25 may be configured to be detachable between the measuring tool 10 and the tape measure 160 or the H-shaped steel 100. At least one of the first magnet 23, the second magnet 24, and the third magnet 25 may be, for example, a hook-and-loop fastener or double-sided tape. This allows the magnet to be used not only for steel components, but also for components made of various metals.

In the above embodiment, a tape measure 160 is used as an example of a device for measuring length, but this is not limiting. A ruler, a laser distance sensor, an ultrasonic sensor, or the like may also be used as a device for measuring length.

In the above embodiment, the surface facing forward of the bent portion of the second part 122 is the first reference surface 124, but this is not limited thereto. The first reference surface 124 may be the surface facing backward of the bent portion of the second part 122 (rear end surface 136). In this case, the third magnet 25 may be embedded so as to be exposed from the first reference surface 124.

In the above embodiment, the second reference surface 130 is configured separately from the first reference surface 124, but this is not limited to the above. The first reference surface 124 may be used as the second reference surface 130 by positioning the center line 162 of the third through hole 131 and the center line 163 of the fourth through hole 132 on the first imaginary plane P2. The fourth portion 129 may be located below the first reference surface 124, the first through hole 126, and the second through hole 127 in order to position the center line 162 of the third through hole 131 and the center line 163 of the fourth through hole 132 on the first imaginary plane P2. This allows the measurement jig 10 to be made smaller.

In addition, in the above embodiment, the second reference surface 130 may be positioned differently from the second convex portion 22 in the up-down direction 7. In other words, the second reference surface 130 may be positioned so as not to overlap in the front-rear direction 8. This makes it possible to prevent the tape measure 160 from overlapping the second convex portion 22 when the tape measure 160 engaged with the second reference surface 130 is extended in the front-rear direction 8, making it easier to take measurements.

In the above embodiment, the third circular hole 140 and the fourth circular hole 141 may be located on the upper surface 112 of the flange 102 of the H-shaped steel 200. The measuring jig 10 may be used to measure the length between the third circular holes 140 (fourth circular holes 141) in the longitudinal direction of the H-shaped steel 200.

In the above embodiment, the first reference surface 124 is preferably located, for example, above the flange 102 or below the flange 103. When the measuring tool 10 is brought closer to the right side of the web 101, the positions of the first convex portion 21 and the second convex portion 22 are surrounded by the web 101, the flange 102, and the first portion 121 and become difficult to see. Therefore, by positioning the first reference surface 124 so that it is visible in the front-rear direction 8, it becomes easier to align the first reference surface 124 with the center line 153 of the first circular hole 105 (center line 154 of the second circular hole 106) in the front-rear direction 8. By aligning the first reference surface 124 with the center line 153 of the first circular hole 105 (center line 154 of the second circular hole 106) in the front-rear direction 8, the positions of the first convex portion 21 (second convex portion 22) and the first circular hole 105 (second circular hole 106) in the front-rear direction 8 can be aligned. Therefore, even in situations where the first convex portion 21 and the second convex portion 22 are difficult to see, they can be easily aligned with the first circular hole 105 and the second circular hole 106.

[Appendix 1]
A measurement jig attached to an H-shaped steel having a first circular hole and a second circular hole positioned apart in a vertical direction at an end of a longitudinal direction of a web,
The main body,
a first protrusion protruding from the main body and insertable into the first circular hole;
a second protrusion protruding from the main body and insertable into the second circular hole;
The main body is a measurement tool having a first reference surface that is spaced apart in the vertical direction from the first circular hole and the second circular hole and that is located on a first imaginary plane that includes the center line of the first circular hole and the center line of the second circular hole.

[Appendix 2]
The above body is
a first portion in which the first convex portion and the second convex portion are located;
a second portion in which the first reference surface is located; and
a third section connecting the first section and the second section,
The measuring tool of claim 1 , wherein the third portion does not overlap the first imaginary plane.

[Appendix 3]
The measurement tool of claim 2 , further comprising a first magnet located in the first portion.

[Appendix 4]
The measuring tool of claim 2 or 3, further comprising a second magnet located in the second portion.

[Appendix 5]
the first protrusion has a cylindrical shape with a part of an outer circumferential surface being chamfered,
The measuring tool according to claim 1 , wherein the second protrusion has a cylindrical shape with a part of an outer circumferential surface being chamfered.

[Appendix 6]
The device further includes a third protrusion protruding from the main body in the up-down direction and a fourth protrusion protruding from the main body in the up-down direction,
The third protrusion can be inserted into a third circular hole located in a flange of the H-shaped steel,
the third protrusion is located on the flange and is insertable into a fourth circular hole spaced apart from the third circular hole in a first direction perpendicular to the up-down direction,
6. A measuring tool as described in any one of claims 1 to 5, wherein the main body has a second reference surface that is spaced apart in the vertical direction from the third circular hole and the fourth circular hole and that is located on a second imaginary plane that includes the center line of the first circular hole and the center line of the second circular hole.

[Appendix 7]
The measuring tool according to claim 6, wherein the second reference surface is at a different position from the first reference surface in the vertical direction, and is at a different position from the first reference surface in the vertical direction and in a second direction perpendicular to the first direction.

[Appendix 8]
The above body is
a first plane on which the first convex portion and the second convex portion are located and which extends in the up-down direction and the first direction;
The measuring tool according to claim 6 or 7, further comprising: a second plane on which the third convex portion and the fourth convex portion are located, the second plane extending in the first direction and the second direction.

7...Vertical direction 8...Anteroposterior direction (first direction)
9...Left and right direction (second direction)
10, 11... Measuring jig 20, 28... Main body 21... First convex portion 22... Second convex portion 23... First magnet 24... Second magnet 25... Third magnet 100... H-shaped steel 101... Web 102, 103... Flange 105... First circular hole 106... Second circular hole 91, 121... First part 92, 122... Second part 93, 123... Third part 124, 145... First reference surface 126... First through hole 127... Second through hole 128, 146... First plane 129... Fourth part 130... Second reference surface 133... Second plane 140... Third circular hole 141... Fourth circular hole 142... Lower surface (second plane)
171: third convex portion 172: fourth convex portion P2: first imaginary plane P3: second imaginary plane

Claims (8)

A measurement jig attached to an H-shaped steel having a first circular hole and a second circular hole positioned apart in a vertical direction at an end of a longitudinal direction of a web,
The main body,
a first protrusion protruding from the main body and insertable into the first circular hole;
a second protrusion protruding from the main body and insertable into the second circular hole;
The main body is a measurement tool having a first reference surface that is spaced apart in the vertical direction from the first circular hole and the second circular hole and that is located on a first imaginary plane that includes the center line of the first circular hole and the center line of the second circular hole. The above body is
a first portion in which the first convex portion and the second convex portion are located;
a second portion in which the first reference surface is located; and
a third section connecting the first section and the second section,
The measuring tool of claim 1 , wherein the third portion does not overlap the first imaginary plane. The measuring tool of claim 2 further comprising a first magnet located in the first portion. The measuring tool according to claim 2 or 3, further comprising a second magnet located in the second portion. the first protrusion has a cylindrical shape with a part of an outer circumferential surface being chamfered,
3. The measuring tool according to claim 1, wherein the second protrusion has a cylindrical shape with a part of an outer circumferential surface being chamfered. The device further includes a third protrusion protruding from the main body in the up-down direction and a fourth protrusion protruding from the main body in the up-down direction,
The third protrusion can be inserted into a third circular hole located in a flange of the H-shaped steel,
the fourth protrusion is located on the flange and is insertable into a fourth circular hole spaced apart from the third circular hole in a first direction perpendicular to the up-down direction,
2. The measuring tool according to claim 1, wherein the main body has a second reference surface that is spaced apart from the third circular hole and the fourth circular hole in the vertical direction and that is located on a second imaginary plane that includes the center line of the third circular hole and the center line of the fourth circular hole. The measurement tool according to claim 6, wherein the second reference surface is at a different position from the first reference surface in the vertical direction, and is at a different position from the first reference surface in the vertical direction and in a second direction perpendicular to the first direction. The above body is
a first plane on which the first convex portion and the second convex portion are located and which extends in the up-down direction and the first direction;
The measuring tool according to claim 7 , further comprising: a second plane on which the third convex portion and the fourth convex portion are located, the second plane extending in the first direction and the second direction.

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