Alignment jig

Abstract

To provide an alignment jig capable of realizing high-precision alignment of through holes with each other regardless of an overlapping state of the through holes, while suppressing noise generation.SOLUTION: A positioning jig for aligning through holes formed in each of a plurality of building materials constituting a building with each other comprises: a pin that includes a body portion capable of being inserted through a through hole and includes a tapered portion whose diameter decreases toward a tip side of the body portion, and a male threaded portion located more at the tip side of the body portion than the tapered portion; and a nut in which a threaded hole including a female threaded portion that is screwed into the male threaded portion is formed. The nut includes a convex portion protruding in a hemispherical shape and having an inlet port of the threaded hole.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an alignment jig for aligning through holes formed in each of a plurality of building materials that constitute a building. [Background technology]

[0002] Conventionally, bolt joints have been widely used to fasten multiple building materials (e.g., splice plates and gusset plates) together. In order to perform this bolt joint, the through holes are sometimes aligned by overlapping the through holes so that at least a portion of the through holes communicate with each other, and then a ball core is struck into each of the through holes with a metal hammer or the like. However, this method produces a loud impact sound when aligning the through holes.

[0003] In response to this, Patent Document 1 discloses a ball core having a head configured to be able to apply torque, an insertion portion that extends from the head and reduces in diameter, and a threaded portion that generates an insertion force in the insertion portion. Furthermore, the threaded portion of this ball core is screwed into a nut that is fixed to a receiving base installed on a building material on the side opposite to the head. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-055449 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the overlapping state of the through holes before the ball core is inserted is not uniform, and the ball core inserted into the through holes is tilted at various angles. Therefore, in the technology described in Patent Document 1, depending on the overlapping state of the through holes, it may be difficult to screw the ball core into the nut fixed to the receiving base, and the accuracy of the alignment of the through holes may be reduced.

[0006] The present disclosure has been made in consideration of the above-mentioned problems, and aims to provide an alignment jig that can achieve high-precision alignment of through holes regardless of the overlap state of the through holes while suppressing the generation of noise. [Means for solving the problem]

[0007] In order to achieve the above object, an alignment jig according to the present disclosure is an alignment jig for aligning through holes formed in each of a plurality of building materials constituting a building, The pin includes a main body portion that can be inserted into the through hole, the pin including a tapered portion that reduces in diameter toward the tip of the main body portion and a male threaded portion that is located closer to the tip of the main body than the tapered portion, and a nut in which a screw hole is formed including a female threaded portion that screws into the male threaded portion, the nut including a convex portion that protrudes in a hemispherical shape and has an entrance to the screw hole.

[0008] In order to achieve the above object, an alignment jig according to the present disclosure is an alignment jig for aligning through holes formed in each of a plurality of building materials constituting a building, the alignment jig comprising: a pin including a main body portion capable of being inserted into the through hole, the pin including a tapered portion whose diameter decreases toward the tip side of the main body portion and a male thread portion located on the tip side of the main body portion relative to the tapered portion; a nut having a screw hole including a female thread portion screwed into the male thread portion; and a cylindrical first spacer having a first insertion hole capable of inserting the male thread portion, the nut having a screw hole including a female thread portion screwed into the male thread portion, the second spacer includes a recess into which at least a portion of the protrusion can be inserted, the recess having a seat surface on its inner circumferential surface such that an inner diameter of the second insertion hole becomes smaller as the seat surface extends from the outlet of the second insertion hole toward the entrance of the second insertion hole, and the recess into which at least a portion of the protrusion can be inserted. Effect of the Invention

[0009] According to the alignment jig of the present disclosure, it is possible to achieve highly accurate alignment of through holes even when the through holes are overlapped, while suppressing the generation of noise. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a diagram illustrating a schematic configuration of an alignment jig according to the first embodiment. [Diagram 2] FIG. 2 is a diagram illustrating a schematic configuration of a large diameter portion according to the first embodiment. [Diagram 3] FIG. 2 is a diagram illustrating a schematic configuration of a tapered portion according to the first embodiment. [Figure 4] FIG. 2 is a diagram illustrating a schematic configuration of a spacer according to the first embodiment. [Figure 5A] 5A to 5C are diagrams illustrating the action and effect of the alignment jig according to the first embodiment. [Figure 5B] 5A to 5C are diagrams illustrating the action and effect of the alignment jig according to the first embodiment. [Figure 6] FIG. 11 is a diagram illustrating an outline of the configuration of an alignment jig according to a second embodiment. [Figure 7A] 13A to 13C are diagrams illustrating the action and effect of the alignment jig according to the second embodiment. [Figure 7B] 13A to 13C are diagrams illustrating the action and effect of the alignment jig according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an alignment jig according to an embodiment of the present disclosure will be described with reference to the drawings. The embodiment shows one aspect of the present disclosure, and does not limit the present disclosure. The embodiment can be arbitrarily modified within the scope of the technical idea of ​​the present disclosure.

[0012] The alignment jig 1 according to the present disclosure aligns the through holes 102 formed in each of a plurality of building materials 100 constituting a building. The building is a steel-framed structure using steel beams and the like. In the present disclosure, as shown in FIG. 5A, an example will be described in which the alignment is performed between a first through hole 102A (102) formed in a first splice plate 100A (100), a second through hole 102B (102) formed in a second splice plate 100B (100), and a third through hole 102C (102) formed in a flange 100C (100) of a steel frame that is an H-shaped steel. At least one of the first splice plate 100A, the second splice plate 100B, and the flange 100C is slidable along a horizontal direction D2 perpendicular to the plate thickness direction of the flange 100C until each of the first splice plate 100A and the second splice plate 100B is bolted to the flange 100C by a fastener such as a high-strength bolt. Note that the object to be bolted is not limited to the flange 100C of the H-shaped steel, and may be, for example, the web of the H-shaped steel.

[0013] First Embodiment (composition) The configuration of an alignment jig 1A(1) according to the first embodiment will be described. FIG. 1 is a diagram showing a schematic configuration of the alignment jig 1A according to the first embodiment. As shown in FIG. 1, the alignment jig 1A includes a pin 2 and a nut 4. In the first embodiment, the alignment jig 1A further includes a spacer 6. The pin 2 has a longitudinal shape along one direction.

[0014] In the present disclosure, of both ends of the pin 2, one that is first inserted into the through-hole 102 is referred to as the tip 20 of the pin 2, and the other is referred to as the base end 22 of the pin 2. The direction in which the pin 2 extends is referred to as the extension direction D1, the direction from the base end 22 of the pin 2 toward the tip 20 of the pin 2 is referred to as one side of the extension direction D1, and the direction from the tip 20 of the pin 2 toward the base end 22 of the pin 2 is referred to as the other side of the extension direction D1.

[0015] The pin 2 includes a main body 10 that can be inserted through each of the first through hole 102A, the second through hole 102B, and the third through hole 102C. The first through hole 102A, the second through hole 102B, and the third through hole 102C have the same diameter, for example, a diameter of 24 mm. The largest diameter portion of the main body 10 (an extension portion 16 described later) has a diameter slightly smaller than the first through hole 102A, the second through hole 102B, and the third through hole 102C, for example, a diameter of 23.8 mm.

[0016] In the first embodiment, as shown in FIG. 1, the pin 2 further includes a large diameter portion 8 having a larger diameter than the main body portion 10. As described below, this large diameter portion 8 is located on the opposite side of the male thread portion 14 in the extension direction D1, sandwiching the tapered portion 12 therebetween. In the first embodiment, the large diameter portion 8 is connected to the other end of the main body portion 10 on the other side of the extension direction D1, and includes a base end 22 of the pin 2. Such a large diameter portion 8 constitutes the head of the pin 2 (ball core). Note that in some embodiments, the large diameter portion 8 is located on one side of the base end 22 of the pin 2 in the extension direction D1.

[0017] Fig. 2 is a diagram showing a schematic configuration of the large diameter portion 8 according to the first embodiment, as viewed from the other side of the extension direction D1. In the first embodiment, as shown in Fig. 2, the large diameter portion 8 has a hexagonal cross-sectional shape cut along a plane perpendicular to the extension direction D1. In some embodiments, the large diameter portion 8 has a rectangular cross-sectional shape cut along a plane perpendicular to the extension direction D1.

[0018] As shown in FIG. 1, the main body 10 includes a tapered portion 12 that reduces in diameter toward the tip side (tip 20 of the pin 2) on one side of the extension direction D1 of the main body 10, and a male threaded portion 14 located on the tip side of the main body 10 relative to the tapered portion 12. In the first embodiment, the main body 10 further includes an extension portion 16 that extends from the large diameter portion 8 toward the tapered portion 12, and a tip portion 18 that extends from one end of the male threaded portion 14 on one side of the extension direction D1 to one side of the extension direction D1. The main body 10 includes the extension portion 16, the tapered portion 12, the male threaded portion 14, and the tip portion 18 in this order from the other side of the extension direction D1. The tip portion 18 includes the tip 20 of the pin 2. The extension portion 16 has a larger diameter than the tapered portion 12. The tapered portion 12 has a larger diameter than the male threaded portion 14. The male threaded portion 14 has a larger diameter than the tip portion 18.

[0019] FIG. 3 is a diagram showing a schematic configuration of the tapered portion 12 according to the first embodiment, in which the pin 2 is cut along the extending direction D1. In the first embodiment, as shown in FIG. 3, when the pin 2 is cut along the extending direction D1, the narrow angle θ formed by a virtual straight line L1 passing through one end 24 on one side of the extending direction D1 of the tapered portion 12 and the other end 26 on the other side of the extending direction D1 of the tapered portion 12 and the axis line L2 of the pin 2 is about 3 degrees. For example, the length of the extending direction D1 of the tapered portion is 70 mm, the diameter of the largest diameter portion of the tapered portion 12 (the portion including the other end 26) is 23.8 mm, and the diameter of the smallest diameter portion of the tapered portion 12 (the portion including the one end 24) is 16 mm. The angle θ is, for example, 2.1 degrees. The one end 24 and the other end 26 of the tapered portion 12 are located at the same position in the circumferential direction centered on the axis L2 of the pin 2. In some embodiments, the angle θ is equal to or greater than 2.5 degrees and equal to or less than 3.5 degrees.

[0020] As shown in FIG. 1, the male thread portion 14 has a screw thread formed thereon. In the first embodiment, the main body portion 10 further includes a connection portion 13 that connects the tapered portion 12 and the male thread portion 14. The connection portion 13 has a smaller diameter than the tapered portion 12 and a larger diameter than the male thread portion 14. The length of the connection portion 13 in the extension direction D1 is shorter than both the tapered portion 12 and the male thread portion 14. The diameter of the male thread portion 14 (φ2 described later) is, for example, 12 mm. The length in the extension direction D1 including the male thread portion 14 and the tip portion 18 is approximately the same as the length of the tapered portion 12 in the extension direction D1.

[0021] 1, the nut 4 is formed with a threaded hole 29 including a female threaded portion 28 that is screwed onto the male threaded portion 14. The threaded hole 29 penetrates the nut 4 along the extension direction D1. Of the openings of the threaded hole 29 in the nut 4, one side into which the pin 2 is inserted is an entrance 31 of the threaded hole 29, and the other side from which the pin 2 exits is an exit 33 of the threaded hole 29.

[0022] The nut 4 includes a protruding portion 30 that protrudes in a semispherical shape. The protruding portion 30 protrudes to the other side in the extension direction D1. The protruding portion 30 has an entrance 31 of the screw hole 29.

[0023] The spacer 6 has a cylindrical shape and is formed with an insertion hole 34 through which the male thread portion 14 can be inserted. The insertion hole 34 penetrates the spacer 6 along the extension direction D1. Of the openings of the spacer 6 formed by the insertion hole 34, one into which the pin 2 is inserted is an entrance 40 of the insertion hole 34, and the other from which the pin 2 exits is an exit 38 of the insertion hole 34. The spacer 6 is positioned closer to the tapered portion 12 than the nut 4 when the through holes 102 are aligned with each other using the alignment jig 1A.

[0024] FIG. 4 is a diagram showing a schematic configuration of the spacer 6 according to the first embodiment, and is a cross-sectional view of the spacer 6 cut along the extending direction D1. In the first embodiment, as shown in FIG. 4, the spacer 6 includes a recess 44 having a seat 42 in which the inner diameter of the insertion hole 34 becomes smaller as it extends from the exit 38 of the insertion hole 34 toward the entrance 40 of the insertion hole 34 among the inner circumferential surface 36 that defines the insertion hole 34. At least a part of the protrusion 30 can be inserted into this recess 44. In the first embodiment, the seat 42 has a curvature approximately equal to that of the hemispherical shape of the protrusion 30, and is curved in a concave shape so as to be recessed toward the other side of the extending direction D1. The curvature is not particularly limited, but is, for example, a radius of 50.9 mm. The seat 42 may have the same curvature as the hemispherical shape of the protrusion 30. In some embodiments, the seat 42 extends linearly along the extending direction D1, and is not curved in a concave or convex shape.

[0025] In the first embodiment, the inner peripheral surface 36 of the spacer 6 further includes a straight surface 46 extending from the entrance 40 of the insertion hole 34 toward the exit 38 of the insertion hole 34 while maintaining the inner diameter of the insertion hole 34. One end of the straight surface 46 on one side in the extension direction D1 (the exit 38 side of the insertion hole 34) is connected to the seat surface 42.

[0026] In the first embodiment, if the inner diameter of the portion of the insertion hole 34 defined by the linear surface 46 is φ1 and the outer diameter of the male thread portion 14 is φ2, then 0.9φ1>φ2 is satisfied. Furthermore, in the first embodiment, 0.5φ1<φ2 is satisfied. φ2 is, for example, 12 mm or 16 mm.

[0027] In addition, by setting φ2 to 12 mm, the axial force introduced to the pin 2 can be increased, and the screw hole 29 and the insertion hole 34 can be more easily aligned, compared to when φ2 is set to 16 mm. Specifically, the force N (axial force N) introduced to the pin 2 by rotating the nut 4 (introducing torque) is N=Tr / (k·d). Here, Tr is the torque coefficient (N·m), which is, for example, the force introduced by a tool. k is the torque coefficient, which is calculated in advance, for example, based on the resistance when rotating the nut 4. d is the diameter of the threaded portion into which the torque is introduced (i.e., φ2). The performance of the jig / tool ​​that can introduce torque to the nut 4 is limited, and it is difficult to make it greater than a certain value (Tr=constant). On the other hand, it is desirable to introduce as large an axial force as possible to the pin 2 so that the misalignment between the screw hole 29 and the insertion hole 34 can be corrected. From the above formula, by reducing d, the introduced axial force can be increased even with the same torque. However, in reality, if d is made too small, the pin 2 becomes more susceptible to damage, so a practical size for d is about 12 to 16 mm (if d is made any larger, it will not be possible to insert the pin 2 into the misaligned screw hole 29). Therefore, by setting d to 12 mm, damage to the pin 2 can be suppressed while ensuring a large introduced axial force.

[0028] (Action and effect) The operation and effect of the alignment jig 1A according to the first embodiment will be described. Fig. 5A is a diagram for explaining the operation and effect of the alignment jig 1A according to the first embodiment, and shows a state in which the pins 2 are inserted into the multiple through holes 102 and the nuts 4 are about to come into contact with the spacer 6. Fig. 5B is a diagram for explaining the operation and effect of the alignment jig 1A according to the first embodiment, and is an enlarged view of a first region A shown in Fig. 5A.

[0029] In order to bolt each of the first splice plate 100A and the second splice plate 100B to the flange 100C, the first splice plate 100A is placed on one side of the flange 100C, and the second splice plate 100B is placed on the other side opposite to the one side of the flange 100C. At this time, the centers of the first through hole 102A, the second through hole 102B, and the third through hole 102C are placed on top of each other so that at least a part of them communicate with each other. However, the centers of the first through hole 102A, the second through hole 102B, and the third through hole 102C are misaligned with each other.

[0030] According to the first embodiment, the main body 10 of the pin 2 is inserted through the first through hole 102A, the second through hole 102B, and the third through hole 102C. At this time, the main body 10 may be inserted more smoothly through the through hole 102 while suppressing noise generation by accessing the large diameter portion 8 with a tool such as a wrench and rotating the large diameter portion 8 in one direction. When at least a part of the male thread portion 14 is positioned on the opposite side of the large diameter portion 8 across the second splice plate 100B, the spacer 6 is inserted into the main body 10, and the nut 4 is inserted (screwed) into at least a part of the male thread portion 14. The spacer 6 is abutted against the surface 104 of the second splice plate 100B opposite to the flange 100C side. The spacer 6 is inserted into the main body 10 so that the area of ​​contact with the second splice plate 100B is large (to make surface contact).

[0031] In the following, a combination of first through hole 102A, second through hole 102B, and third through hole 102C will be referred to as composite through hole 103, as shown in FIG. 5A.

[0032] By rotating the nut 4 with the male thread portion 14 inserted into the screw hole 29 of the nut 4, the nut 4 comes into contact with the spacer 6, and the main body portion 10 of the pin 2 is inserted deeply into the composite through hole 103 so that the large diameter portion 8 of the pin 2 approaches the first splice plate 100A. At this time, the tapered surface of the tapered portion 12 becomes a guide surface to shift the position of at least one of the first through hole 102A, the second through hole 102B, and the third through hole 102C in the horizontal direction D2, and the centers of the first through hole 102A, the second through hole 102B, and the third through hole 102C are aligned with each other. In this way, the tapered portion 12 aligns the first through hole 102A, the second through hole 102B, and the third through hole 102C. Therefore, noise generation can be suppressed compared to a conventional ball core in which the through holes 102 are aligned by being hammered into the composite through hole 103 with a metal hammer or the like. Note that the pin 2 may be inserted into the composite through hole 103 and used as a temporary bolt for temporary fastening.

[0033] Furthermore, as shown in FIG. 5B, the convex portion 30 is inserted into the concave portion 44 by rotating the nut 4, so that the convex portion 30 interferes with the seating surface 42, and the seating surface 42 acts as a guide surface to correct the inclination of the nut 4 and the positional deviation of the nut 4 in the horizontal direction D2 so that the center line L3 of the nut 4 is aligned with the center line L4 of the spacer 6. Then, with this correction of the position of the nut 4, the center of the first through hole 102A, the center of the second through hole 102B, and the center of the third through hole 102C are aligned with higher accuracy via the main body 10 (particularly the tapered portion 12). In other words, the eccentricity of the pin 2 inserted into the composite through hole 103 can be eliminated. In this way, the centers of the through holes 102 can be aligned using the nut 4 regardless of the state in which the through holes 102 are overlapped with each other.

[0034] In the first embodiment, the alignment jig 1A includes the spacer 6 in which the recess 44 having the seat surface 42 is formed, but the present disclosure is not limited to this form. In some embodiments, the alignment jig 1 includes the pin 2 and the nut 4, but does not include the spacer 6. In this case, the surface 104 of the second splice plate 100B functions as the seat surface 42. In some embodiments, a recess is formed in the surface 104 of the flange 100C, into which at least a part of the protrusion 30 can be inserted and which includes a surface that functions as the seat surface 42.

[0035] In the first embodiment, the convex portion 30 is formed on the nut 4, and the concave portion 44 is formed on the spacer 6, but the present disclosure is not limited to this form. Although not shown, in some embodiments, the spacer 6 includes a convex portion that protrudes in a semispherical shape toward the nut 4 and has an outlet 38 of the insertion hole 34. The nut 4 includes a concave portion having a seat surface in which the inner diameter of the screw hole 29 decreases as it extends from the inlet 31 of the screw hole 29 toward the outlet 33, and into which at least a part of the above-mentioned convex portion can be inserted.

[0036] According to the first embodiment, the spacer 6 prevents the nut 4 from contacting the second splice plate 100B, so that damage to the second splice plate 100B can be prevented.

[0037] According to the findings of the present inventors, it has been found that in order to realize the alignment of the through holes 102 with each other, the main body portion 10 needs to move along the horizontal direction D2 in a state in which the main body portion 10 is inserted into the insertion hole 34 of the spacer 6. In other words, the alignment of the through holes 102 with each other can be realized by appropriately setting the difference between the inner diameter φ1 and the outer diameter φ2.

[0038] If the difference between the inner diameter φ1 and the outer diameter φ2 is too small, the swing width of the main body 10 becomes small, and the amount of deviation in the horizontal direction D2 by which the pin 2 can be inserted into the spacer 6 becomes small. In other words, if the deviation between the through holes 102 becomes large, there is a risk that alignment becomes difficult. On the other hand, if the difference between the inner diameter φ1 and the outer diameter φ2 is too large, there is a risk that the main body 10 moves excessively along the horizontal direction D2. In the first embodiment, since 0.9φ1>φ2 is satisfied, even if the deviation between the through holes 102 becomes large, the main body 10 can be moved along the horizontal direction D2 to achieve alignment between the through holes 102. Furthermore, in the first embodiment, since 0.5φ1<φ2 is satisfied, it is possible to suppress the main body 10 from moving excessively along the horizontal direction D2.

[0039] According to the first embodiment, as illustrated in Fig. 3, the tapered portion 12 is configured so that the angle θ is about 3 degrees. By making the angle θ about 3 degrees, the force for moving the main body portion 10 inserted into the insertion hole 34 is reduced, and the torque required for aligning the through holes 102 with each other can be reduced.

[0040] According to the first embodiment, the pin 2 includes a large diameter portion 8, and therefore after aligning the through holes 102, the pin 2 can be easily removed from the composite through hole 103 by accessing the large diameter portion 8 with a tool such as a wrench and turning the large diameter portion 8 in the opposite direction to the one direction.

[0041] <Second embodiment> An alignment jig 1B(1) according to a second embodiment of the present disclosure will be described. The alignment jig 1B according to the second embodiment differs from the first embodiment in that a first spacer 52 includes a convex portion 53 instead of the nut 4, and a second spacer 54 includes a concave portion 76 instead of the spacer 6. In the second embodiment, the same components as those in the first embodiment are given the same reference symbols, and detailed descriptions thereof will be omitted.

[0042] (composition) Fig. 6 is a diagram illustrating a schematic configuration of an alignment jig 1B according to the second embodiment. As illustrated in Fig. 6, the alignment jig 1B includes a pin 2, a nut 50, a first spacer 52, and a second spacer 54.

[0043] The nut 50 is formed with a screw hole 29 including a female threaded portion 28 that is screwed onto the male threaded portion 14. The nut 50 is, for example, a hexagonal nut. The surface of the nut 50 on the other side in the extending direction D1 is flush.

[0044] The first spacer 52 has a cylindrical shape, and is formed with a first insertion hole 56 through which the male thread portion 14 can be inserted. The first insertion hole 56 penetrates the first spacer 52 along the extension direction D1. Of the openings of the first spacer 52 by the first insertion hole 56, one into which the pin 2 is inserted is an entrance 60 of the first insertion hole 56, and the other from which the pin 2 exits is an exit 58 of the first insertion hole 56. The first spacer 52 is located closer to the tapered portion 12 than the nut 50 when the through holes 102 are aligned with each other using the alignment jig 1B.

[0045] The first spacer 52 includes a protruding portion 53 that protrudes in a semispherical shape. The protruding portion 53 protrudes to the other side in the extension direction D1. The protruding portion 53 has an entrance 60 of a first insertion hole 56.

[0046] In the second embodiment, as shown in Fig. 6, the first spacer 52 includes a first inclined surface 62 in an inner peripheral surface 61 that defines the first insertion hole 56, in which the inner diameter of the first insertion hole 56 decreases as it extends from the exit 58 of the first insertion hole 56 toward the entrance 60 of the first insertion hole 56, and a first straight surface 64 that extends from the entrance 60 of the first insertion hole 56 toward the exit 58 of the first insertion hole 56 while maintaining the inner diameter of the first insertion hole 56. The first inclined surface 62 is inclined in the range of 35 degrees to 55 degrees with respect to the center line L5 of the first spacer 52, for example, at 45 degrees. One end of the first inclined surface 62 on the other side (the entrance 60 side of the first insertion hole 56) in the extension direction D1 is connected to the first straight surface 64.

[0047] The second spacer 54 has a cylindrical shape, and is formed with a second insertion hole 66 through which the male thread portion 14 can be inserted. The second insertion hole 66 penetrates the second spacer 54 along the extension direction D1. Of the openings of the second spacer 54 by the second insertion hole 66, one into which the pin 2 is inserted is an entrance 68 of the second insertion hole 66, and the other from which the pin 2 exits is an exit 70 of the second insertion hole 66. The second spacer 54 is located closer to the tapered portion 12 than the first spacer 52 when the through holes 102 are aligned with each other using the alignment jig 1B.

[0048] The second spacer 54 includes a recess 76 having a seat 74 in an inner circumferential surface 72 that defines the second insertion hole 66, the seat 74 having an inner diameter that decreases as the second insertion hole 66 extends from the outlet 70 of the second insertion hole 66 toward the inlet 68 of the second insertion hole 66. At least a part of the protrusion 53 can be inserted into the recess 76. In the second embodiment, the seat 74 is curved in a concave shape. In another embodiment, the seat 74 extends linearly along the extension direction D1.

[0049] In the second embodiment, as shown in FIG. 6 , the inner surface 72 of the second spacer 54 further includes a second inclined surface 78 in which the inner diameter of the second insertion hole 66 decreases as it extends from the inlet 68 of the second insertion hole 66 toward the outlet 70 of the second insertion hole 66, and a second straight surface 80 that connects the second inclined surface 78 and the seat surface 74 while maintaining the inner diameter of the second insertion hole 66.

[0050] (Action and effect) The action and effect of the alignment jig 1B according to the second embodiment will be described. Fig. 7A is a diagram for explaining the action and effect of the alignment jig 1B according to the second embodiment, and shows a state in which the pin 2 is inserted into the composite through hole 103 and the first spacer 52 is about to abut against the second spacer 54. Fig. 7B is a diagram for explaining the action and effect of the alignment jig 1B according to the second embodiment, and is an enlarged view of the second region B shown in Fig. 7A.

[0051] In order to bolt each of the first splice plate 100A and the second splice plate 100B to the flange 100C, the first splice plate 100A is placed on one side of the flange 100C, and the second splice plate 100B is placed on the other side of the flange 100C. At this time, the centers of the first through hole 102A, the second through hole 102B, and the third through hole 102C are placed on top of each other so that they are at least partially in communication with each other. However, the centers of the first through hole 102A, the second through hole 102B, and the third through hole 102C are misaligned with each other.

[0052] According to the second embodiment, the main body 10 of the pin 2 is inserted into the composite through hole 103. At this time, a tool such as a wrench may be used to access the large diameter portion 8 and rotate the large diameter portion 8 in one direction to more smoothly insert the main body 10 into the through hole 102 while suppressing noise generation. When at least a part of the male thread portion 14 is positioned on the opposite side of the large diameter portion 8 across the second splice plate 100B, the first spacer 52 and the second spacer 54 are inserted into the main body 10, and the nut 50 is inserted (screwed) into at least a part of the male thread portion 14. Then, the second spacer 54 is brought into contact with the surface 104 of the second splice plate 100B.

[0053] By rotating the nut 50 with the male thread portion 14 inserted into the screw hole 29 of the nut 50, the nut 50 presses the first spacer 52, and the first spacer 52 abuts against the second spacer 54. Then, the main body portion 10 of the pin 2 is deeply inserted into the composite through hole 103 so that the large diameter portion 8 of the pin 2 approaches the first splice plate 100A. At this time, the tapered surface of the tapered portion 12 becomes a guide surface to shift the position of at least one of the first through hole 102A, the second through hole 102B, and the third through hole 102C in the horizontal direction D2, and the centers of the first through hole 102A, the second through hole 102B, and the third through hole 102C are aligned with each other. In this way, the tapered portion 12 aligns the first through hole 102A, the second through hole 102B, and the third through hole 102C. Therefore, noise generation can be suppressed compared to a conventional ball core in which the through holes 102 are aligned by being struck into the composite through hole 103 with a metal hammer or the like. Note that the pin 2 may be inserted into the composite through hole 103 and used as a temporary bolt for temporary fastening.

[0054] Furthermore, as shown in FIG. 7B, the convex portion 53 of the first spacer 52 is inserted into the concave portion 76 of the second spacer 54 by rotating the nut 50, so that the convex portion 53 interferes with the seating surface 74, and the seating surface 74 acts as a guide surface to correct the inclination of the first spacer 52 and the positional deviation in the horizontal direction D2 of the first spacer 52 so that the center line L5 of the first spacer 52 is aligned with the center line L6 of the second spacer 54. Then, with the correction of the position of the first spacer 52, the center of the first through hole 102A, the center of the second through hole 102B, and the center of the third through hole 102C are aligned with higher accuracy via the main body 10 (particularly the tapered portion 12). In other words, the eccentricity of the pin 2 inserted into the composite through hole 103 can be eliminated. In this way, the centers of the through holes 102 can be aligned using the nut 50 regardless of the state in which the through holes 102 are overlapped with each other.

[0055] The contents described in each of the above embodiments can be understood, for example, as follows.

[0056] [1] The alignment jig (1A) according to the present disclosure is An alignment tool for aligning through holes (102) formed in each of a plurality of building materials (100) constituting a building, comprising: a pin (2) including a main body portion (10) that can be inserted into the through hole, the pin (2) including a tapered portion (12) that reduces in diameter toward the tip end of the main body portion and a male thread portion (14) located on the tip end side of the main body portion relative to the tapered portion; a nut (4) having a screw hole (29) including a female thread portion (28) that is screwed into the male thread portion, The nut includes a protrusion (30) that protrudes in a semispherical shape and has an entrance (31) for the screw hole.

[0057] According to the configuration described in [1] above, by rotating the nut with the male thread portion inserted into the screw hole, the main body portion is inserted deeply into the through holes, and the through holes are aligned by the tapered portion. Therefore, compared to the conventional ball core in which the through holes are aligned by being hammered into the through holes with a metal hammer or the like, the generation of noise can be suppressed. Furthermore, since the nut includes a convex portion that protrudes in a semispherical shape and has an entrance to the screw hole, by preparing an interference object that interferes with the convex portion, the inclination of the nut and the positional deviation of the nut in the horizontal direction (the direction perpendicular to the thickness direction of the building material) can be corrected, and the through holes can be aligned with high precision. In this way, the centers of the through holes can be aligned regardless of the state in which the through holes are overlapped.

[0058] [2] In some embodiments, in the configuration described in [1] above, The screw further includes a cylindrical spacer (6) having an insertion hole (34) through which the male threaded portion can be inserted, the spacer (6) being located closer to the tapered portion than the nut.

[0059] According to the configuration described in [2] above, contact between the nut and the building material is prevented, thereby preventing damage to the building material.

[0060] [3] In some embodiments, in the configuration described in [2] above, The spacer includes a recess (44) into which at least a portion of the protrusion can be inserted, the recess having a seat surface (42) on its inner surface, in which the inner diameter of the insertion hole decreases as it extends from the exit (38) of the insertion hole toward the entrance (40) of the insertion hole.

[0061] According to the configuration described in [3] above, by inserting the protrusion into the recess, the protrusion interferes with the seating surface, so that the inclination of the nut and the horizontal positional deviation of the nut can be corrected. This further improves the accuracy of aligning the through holes with each other.

[0062] [4] In some embodiments, in the configuration described in [3] above, The inner peripheral surface of the insertion hole further includes a straight surface (46) extending from the entrance of the insertion hole toward the exit of the insertion hole while maintaining the inner diameter of the insertion hole.

[0063] According to the findings of the present inventors, in order to realize highly accurate alignment between the through holes, it has been found that the main body needs to move along the horizontal direction while being inserted into the insertion hole of the spacer. According to the configuration described in [4] above, it is possible to prepare a spacer having an inner diameter capable of realizing highly accurate alignment between the through holes.

[0064] [5] In some embodiments, in the configuration described in [4] above, If the inner diameter of the portion of the insertion hole defined by the linear surface is φ1 and the outer diameter of the male thread portion is φ2, Satisfy 0.9φ1>φ2.

[0065] According to the configuration described in [5] above, even if the misalignment between the through holes becomes large, the through holes can be aligned by moving the main body in the horizontal direction.

[0066] [6] In some embodiments, in the configuration described in [5] above, Satisfy 0.5φ1<φ2.

[0067] According to the configuration described in [6] above, excessive movement of the main body in the horizontal direction can be suppressed.

[0068] [7] In some embodiments, in the configuration according to any one of [1] to [6] above, The direction in which the pin extends is defined as an extension direction (D1), and when the pin is cut along the extension direction, The angle (θ) formed by a virtual straight line (L1) passing through one end (24) of the tapered portion on one side in the extension direction and the other end (26) of the tapered portion on the other side in the extension direction and the axis (L2) of the pin is approximately 3 degrees.

[0069] According to the configuration described in [7] above, the tapered portions can be smoothly inserted into the through holes, so that the torque required to rotate the nut can be reduced.

[0070] [8] In some embodiments, in the configuration according to any one of [1] to [7] above, The pin further includes a large diameter portion (8) located on the opposite side of the tapered portion from the male thread portion and having a larger diameter than the main body portion, The large diameter portion has a hexagonal cross section taken along a plane perpendicular to the extending direction of the pin.

[0071] According to the configuration described in [8] above, after aligning the centers of the through holes, the pins can be easily removed from each of the multiple building materials by accessing the large diameter portion with a tool such as a wrench and turning the large diameter portion.

[0072] [9] The alignment jig (1B) according to the present disclosure is An alignment tool for aligning through holes (102) formed in each of a plurality of building materials (100) constituting a building, comprising: a pin (2) including a main body portion (10) that can be inserted into the through hole, the pin (2) including a tapered portion (12) that reduces in diameter toward the tip end of the main body portion and a male thread portion (14) located on the tip end side of the main body portion relative to the tapered portion; a nut (50) having a screw hole (29) including a female thread portion (28) that is screwed into the male thread portion; a cylindrical first spacer (52) having a first insertion hole (56) through which the male thread portion can be inserted, the first spacer (52) being located closer to the tapered portion than the nut; a cylindrical second spacer (54) having a second insertion hole (66) into which the male screw portion can be inserted, the second spacer (54) being located closer to the tapered portion than the first spacer; the first spacer includes a protrusion (53) that protrudes in a semispherical shape and has an entrance (60) of the first insertion hole, The second spacer includes a recess (76) into which at least a portion of the protrusion can be inserted, the recess (76) having a seat surface (74) on an inner surface (72) into which the inner diameter of the second insertion hole decreases as the seat surface (74) extends from the outlet (70) of the second insertion hole toward the inlet (68) of the second insertion hole.

[0073] According to the configuration described in [9] above, by rotating the nut with the male thread portion inserted into the screw hole, the main body portion is inserted deeply into the through holes, and the through holes are aligned by the tapered portion. Therefore, compared to a conventional ball core in which the through holes are aligned by being hammered into the through holes with a metal hammer or the like, the generation of noise can be suppressed. Furthermore, since the first spacer includes a convex portion that protrudes in a semispherical shape and has an entrance to the first insertion hole, the convex portion can be inserted into the concave portion to interfere with the seating surface, correcting the inclination of the first spacer and the horizontal positional deviation of the first spacer, thereby enabling highly accurate alignment of the through holes. In this way, the centers of the through holes can be aligned regardless of the state in which the through holes are overlapped. [Explanation of symbols]

[0074] 1 Alignment jig 1A Alignment jig (first embodiment) 1B Alignment jig (second embodiment) 2 pin 4 Nuts 6 Spacer 8 Large diameter section 10 Main body 12 Tapered section 13 Connection 14 Male thread 16 Extension 18 Tip 20 Tip 22 Proximal end 24 One end of the tapered section 26 Other end of tapered section 28 Female thread 29 Screw holes 30 Convex portion (first embodiment) 31 Screw hole entrance 33 Screw hole exit 34 Insertion hole 36 Inner surface of spacer 38 Exit of insertion hole 40 Entrance of insertion hole 42 Seat (first embodiment) 44 Recess (first embodiment) 46 Straight Surface 50 Nut (second embodiment) 52 First spacer 53 Convex portion (second embodiment) 54 Second Spacer 56 First insertion hole 58 Exit of first insertion hole 60 Entrance of the first insertion hole 61 Inner peripheral surface of first spacer 62 1st slope 64 1st straight plane 66 Second insertion hole 68 Entrance of second insertion hole 70 Exit of second insertion hole 72 Inner peripheral surface of second spacer 74 Seat (Second embodiment) 76 Recess (second embodiment) 78 Second slope 80 Second straight plane 100 Building materials 100A First Splice Plate 100B Second splice plate 100C flange 102 Through hole 102A First through hole 102B Second through hole 102C Third through hole 103 Composite through hole 104 Second splice plate surface A 1st area B 2nd area D1 Extending direction D2 horizontal direction L1 straight line L2 Pin axis L3 Center line of nut (first embodiment) L4 Spacer center line (first embodiment) L5: Center line of first spacer (second embodiment) L6: Center line of second spacer (second embodiment)

Claims

1. An alignment jig for aligning through holes formed in each of a plurality of building materials constituting a building, a pin including a main body portion that can be inserted into the through hole, the pin including a tapered portion that decreases in diameter toward a tip end of the main body portion and a male thread portion that is located on the tip end side of the main body portion relative to the tapered portion; a nut having a screw hole including a female thread portion screwed into the male thread portion; The nut includes a protrusion that protrudes in a semispherical shape and has an entrance to the screw hole. Alignment fixture.

2. a cylindrical spacer having an insertion hole through which the male screw portion can be inserted, the spacer being located closer to the tapered portion than the nut; The alignment jig according to claim 1 .

3. the spacer includes a recess having a seat surface on an inner circumferential surface thereof, the seat surface being such that an inner diameter of the insertion hole becomes smaller as the seat surface extends from an outlet of the insertion hole toward an inlet of the insertion hole, and the recess includes a seat surface into which at least a portion of the protrusion can be inserted. The alignment jig according to claim 2 .

4. The inner circumferential surface further includes a linear surface extending from the entrance of the insertion hole toward the exit of the insertion hole while maintaining an inner diameter of the insertion hole. The alignment jig according to claim 3 .

5. If the inner diameter of the portion of the insertion hole defined by the linear surface is φ1 and the outer diameter of the male thread portion is φ2, 0.9φ1>φ2 is satisfied. The alignment jig according to claim 4 .

6. 0.5φ1<φ2 is satisfied. The alignment jig according to claim 5 .

7. The direction in which the pin extends is defined as an extension direction, and when the pin is cut along the extension direction, an angle formed by a virtual straight line passing through one end of the tapered portion on one side in the extending direction and the other end of the tapered portion on the other side in the extending direction and an axis of the pin is about 3 degrees; The alignment jig according to claim 1 .

8. The pin further includes a large diameter portion located on the opposite side of the tapered portion from the male thread portion and having a larger diameter than the main body portion, The large diameter portion has a hexagonal cross-sectional shape when cut along a plane perpendicular to the extending direction of the pin. The alignment jig according to claim 1 .

9. An alignment jig for aligning through holes formed in each of a plurality of building materials constituting a building, a pin including a main body portion that can be inserted into the through hole, the pin including a tapered portion that decreases in diameter toward a tip end of the main body portion and a male thread portion that is located on the tip end side of the main body portion relative to the tapered portion; A nut having a screw hole including a female thread portion screwed into the male thread portion; a cylindrical first spacer having a first insertion hole through which the male thread portion can be inserted, the first spacer being located closer to the tapered portion than the nut; a cylindrical second spacer having a second insertion hole through which the male screw portion can be inserted, the second spacer being located closer to the tapered portion than the first spacer; the first spacer includes a protrusion that protrudes in a semispherical shape and has an entrance to the first insertion hole, the second spacer includes a recess having a seat surface on an inner circumferential surface thereof, the seat surface having an inner diameter of the second insertion hole that decreases as the seat surface extends from the outlet of the second insertion hole toward the inlet of the second insertion hole, and the recess includes a seat surface into which at least a portion of the protrusion can be inserted. Alignment fixture.

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