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

[0005] , , ,

[0001] The present disclosure relates to an alignment jig for aligning the positions of through-holes formed in each of a plurality of building materials constituting a building.

Background Art

[0002] Conventionally, bolt joining has been widely used to fix a plurality of building materials (for example, splice plates and gusset plates) to each other. In order to perform this bolt joining, in a state where at least a part of the through-holes are overlapped so as to communicate with each other, a ball core may be driven into each of the through-holes by a metal hammer or the like to align the through-holes. However, such a method involves a large impact sound when aligning the through-holes.

[0003] On the other hand, 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 has a reduced diameter, and a screw portion that generates an insertion force in the insertion portion. Further, the screw portion of this ball core is screwed into a nut fixed to a pedestal installed on a building material on the side opposite to the head.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the overlapping state of the through-holes before the insertion of the ball core is not uniform, and the ball cores inserted into the through-holes are inclined at various angles. Therefore, in the technique 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 pedestal, and there is a risk that the accuracy of aligning the through-holes may be reduced.

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

[0007] To achieve the above objective, the alignment jig relating to this disclosure is 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 through which the through hole can be inserted, the pin including a tapered portion that decreases in diameter towards the tip of the main body portion and a male threaded portion located on the tip side of the main body portion beyond the tapered portion, and a nut having a screw hole formed therein, which includes a female threaded portion that is screwed onto the male threaded portion, wherein the nut includes a convex portion that protrudes in a hemispherical shape and has an entrance to the screw hole.

[0008] To achieve the above objective, the 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, comprising: a pin including a main body portion through which the through hole can be inserted, the pin including a tapered portion that decreases in diameter towards the tip of the main body portion and a male threaded portion located on the tip side of the main body portion beyond the tapered portion; a nut having a screw hole formed therein including a female threaded portion that is screwed into the male threaded portion; and a cylindrical first spacer having a first insertion hole through which the male threaded portion can be inserted, wherein the nut The first spacer is located on the tapered side of the first spacer, and the second spacer is cylindrical in shape and has a second insertion hole through which the male threaded portion can be inserted, and is located on the tapered side of the first spacer, wherein the first spacer includes a convex portion that protrudes in a hemispherical shape and has an entrance to the first insertion hole, and the second spacer includes a recess on its inner circumferential surface that has a seating surface through which the inner diameter of the second insertion hole decreases as it extends from the exit to the entrance of the second insertion hole, and includes a recess into which at least a part of the convex portion can be inserted. [Effects of the Invention]

[0009] According to the alignment jig disclosed herein, high-precision alignment of through-holes can be achieved regardless of whether the through-holes are overlapping, while suppressing the generation of noise. [Brief explanation of the drawing]

[0010] [Figure 1] This diagram schematically shows the configuration of the alignment jig according to the first embodiment. [Figure 2] This diagram schematically shows the configuration of the large-diameter section according to the first embodiment. [Figure 3] This diagram schematically shows the configuration of the tapered portion according to the first embodiment. [Figure 4] This diagram schematically shows the configuration of the spacer according to the first embodiment. [Figure 5A] This figure illustrates the operation and effects of the alignment jig according to the first embodiment. [Figure 5B] This figure illustrates the operation and effects of the alignment jig according to the first embodiment. [Figure 6] This diagram schematically shows the configuration of the alignment jig according to the second embodiment. [Figure 7A] This figure illustrates the operation and effects of the alignment jig according to the second embodiment. [Figure 7B] This figure illustrates the operation and effects of the alignment jig according to the second embodiment. [Modes for carrying out the invention]

[0011] The alignment jig according to the embodiments of this disclosure will be described below with reference to the drawings. Such embodiments represent one aspect of this disclosure and are not limiting, and can be modified at will within the scope of the technical idea of ​​this disclosure.

[0012] The alignment jig 1 according to this disclosure aligns through holes 102 formed in each of a plurality of building materials 100 that constitute a building. The building is constructed using a steel frame structure, such as steel beams. In this disclosure, as shown in Figure 5A, the case of aligning 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, which is an H-shaped steel, will be explained as an example. Until the first splice plate 100A and the second splice plate 100B are bolted to the flange 100C by fasteners such as high-strength bolts, 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 thickness direction of the flange 100C. Note that the object to be bolted is not limited to the flange 100C of the H-beam, but may also be, for example, the web of the H-beam.

[0013] <First Embodiment> (composition) The configuration of the alignment jig 1A(1) according to the first embodiment will now be described. Figure 1 is a schematic diagram showing the configuration of the alignment jig 1A according to the first embodiment. As shown in Figure 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 this disclosure, one of the ends of the pin 2 that is first inserted into the through hole 102 is defined as the tip 20 of the pin 2, and the other end is defined as the base 22 of the pin 2. The direction in which the pin 2 extends is defined as the extending direction D1, the direction from the base 22 of the pin 2 toward the tip 20 of the pin 2 is defined as one direction of the extending direction D1, and the direction from the tip 20 of the pin 2 toward the base 22 of the pin 2 is defined as the other direction of the extending direction D1.

[0015] Pin 2 includes a main body portion 10 that can be inserted through each of the first through-hole 102A, the second through-hole 102B, and the third through-hole 102C. Each of the first through-hole 102A, the second through-hole 102B, and the third through-hole 102C has the same diameter as each other, for example, a diameter of 24 mm. The portion with the largest diameter in the main body portion 10 (the extending portion 16 described later) is slightly smaller in diameter than each of 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. This large-diameter portion 8 is located on the opposite side of the male screw portion 14 across the tapered portion 12 in the extending direction D1, as will be described later. In the first embodiment, the large-diameter portion 8 is connected to the other end on the other side in the extending direction D1 of the main body portion 10 and includes the base end 22 of the pin 2. Such a large-diameter portion 8 constitutes the head of the pin 2 (the ball center). In some embodiments, the large-diameter portion 8 is located on one side in the extending direction D1 from the base end 22 of the pin 2.

[0017] FIG. 2 is a diagram schematically showing the configuration of the large-diameter portion 8 according to the first embodiment, and is a view of the large-diameter portion 8 viewed from the other side in the extending direction D1. In the first embodiment, as shown in FIG. 2, the large-diameter portion 8 has a hexagonal cross-sectional shape when cut by a plane orthogonal to the extending direction D1. In some embodiments, the large-diameter portion 8 has a rectangular cross-sectional shape when cut by a plane orthogonal to the extending direction D1.

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

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

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

[0021] As shown in Figure 1, the nut 4 has a screw hole 29 that includes a female screw portion 28 which is screwed into the male screw portion 14. The screw hole 29 penetrates the nut 4 along the extending direction D1. Of the openings in the nut 4 formed by the screw hole 29, one side into which the pin 2 is inserted is designated as the entrance 31 of the screw hole 29, and the other side from which the pin 2 exits is designated as the exit 33 of the screw hole 29.

[0022] The nut 4 includes a hemispherical projection 30. The projection 30 protrudes to the other side in the extending direction D1. This projection 30 has an entrance 31 to the screw hole 29.

[0023] The spacer 6 has a cylindrical shape and has a through hole 34 through which the male threaded portion 14 can be inserted. The through hole 34 penetrates the spacer 6 along the extending direction D1. Of the openings in the spacer 6 formed by the through hole 34, one side into which the pin 2 is inserted is designated as the entrance 40 of the through hole 34, and the other side through which the pin 2 exits is designated as the exit 38 of the through hole 34. When aligning the through holes 102 of the spacer 6 using the alignment jig 1A, the spacer 6 is positioned on the tapered portion 12 side of the nut 4.

[0024] Figure 4 is a schematic diagram showing the 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 Figure 4, the spacer 6 includes a recess 44 having a seating surface 42 that defines the insertion hole 34, and the inner diameter of the insertion hole 34 decreases as it extends from the exit 38 of the insertion hole 34 toward the entrance 40 of the insertion hole 34. At least a portion of the convex portion 30 can be inserted into this recess 44. In the first embodiment, the seating surface 42 has a curvature similar to that of the hemispherical shape of the convex portion 30 and is curved in a concave shape so as to recess to the other side in the extending direction D1. The curvature is not particularly limited, but for example, it is a radius of 50.9 mm. The seating surface 42 may have the same curvature as the hemispherical shape of the convex portion 30. In some embodiments, the seating surface 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 circumferential surface 36 of the spacer 6 further includes a straight surface 46 that extends 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 in the extending direction D1 (towards the exit 38 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 straight surface 46 is φ1 and the outer diameter of the male thread portion 14 is φ2, then the condition 0.9φ1 > φ2 is satisfied. Furthermore, in the first embodiment, the condition 0.5φ1 < φ2 is satisfied. φ2 is, for example, 12 mm or 16 mm.

[0027] Furthermore, by setting φ2 to 12mm, the axial force introduced into pin 2 can be increased compared to setting φ2 to 16mm, making it easier to align the screw hole 29 and the insertion hole 34. Specifically, the force N (axial force N) introduced into pin 2 by rotating nut 4 (introducing torque) is given by 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 based on the resistance when rotating nut 4. d is the diameter of the screw part into which the torque is introduced (i.e., φ2). The performance of the jig / tool ​​that can introduce torque into nut 4 is limited, and it is difficult to exceed a certain value (Tr = constant). On the other hand, it is desirable to introduce as large an axial force as possible into pin 2 so that the misalignment between screw hole 29 and 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, pin 2 becomes prone to breakage, so a practical size for d is around 12-16 mm (any larger and it cannot be inserted into the misaligned screw hole 29). Therefore, by setting d to 12 mm, it is possible to secure a large introduction axial force while suppressing breakage of pin 2.

[0028] (Effects / Actions) The operation and effects of the alignment jig 1A according to the first embodiment will now be described. Figure 5A is a diagram illustrating the operation and effects of the alignment jig 1A according to the first embodiment, showing the state in which the pin 2 is inserted through the plurality of through holes 102 and the nut 4 is just before it comes into contact with the spacer 6. Figure 5B is a diagram illustrating the operation and effects of the alignment jig 1A according to the first embodiment, and is an enlarged view of the first region A shown in Figure 5A.

[0029] In order to bolt the first splice plate 100A and the second splice plate 100B to the flange 100C, the first splice plate 100A is superimposed on one side of the flange 100C, and the second splice plate 100B is superimposed on the other side of the flange 100C opposite to that side. At this time, the centers of the first through hole 102A, the second through hole 102B, and the third through hole 102C are superimposed so that at least a portion 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 offset from 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, 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, thereby suppressing the generation of noise and allowing the main body 10 to be inserted more smoothly into the through holes 102. Once at least a portion of the male threaded portion 14 is positioned on the opposite side of the large diameter portion 8 with the second splice plate 100B in between, the spacer 6 is inserted into the main body 10 and the nut 4 is inserted (screwed) into at least a portion of the male threaded portion 14. The spacer 6 is brought into contact with the surface 104 of the second splice plate 100B on the side opposite to the flange 100C. The spacer 6 is inserted into the main body 10 in such a way that the contact area with the second splice plate 100B is increased (surface contact is achieved).

[0031] In the following, as shown in Figure 5A, the first through hole 102A, the second through hole 102B, and the third through hole 102C are combined into a single composite through hole 103.

[0032] By rotating the nut 4 with the male threaded portion 14 inserted into the threaded 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 deeply inserted into the composite through hole 103 so that the large diameter portion 8 of the pin 2 is close to the first splice plate 100A. At this time, the tapered surface of the tapered portion 12 acts as a guide surface, shifting the horizontal position D2 of at least one of the first through hole 102A, the second through hole 102B, and the third through hole 102C, so that 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, compared to conventional ball cores, which align the through holes 102 by being hammered into the composite through hole 103 with a metal hammer or the like, noise generation can be suppressed. Furthermore, the pin 2 may be used as a temporary bolt for temporary fastening by being inserted through the composite through hole 103.

[0033] Furthermore, as shown in Figure 5B, the rotation of the nut 4 causes the protrusion 30 to enter the recess 44, causing the protrusion 30 to interfere with the seating surface 42. The seating surface 42 acts as a guide surface, correcting the tilt of the nut 4 and the misalignment of its horizontal position D2, so that the center line L3 of the nut 4 aligns with the center line L4 of the spacer 6. As a result of this correction of the position of the nut 4, the centers of the first through hole 102A, the second through hole 102B, and the third through hole 102C are aligned with even greater precision via the main body 10 (especially the tapered portion 12). In other words, the eccentricity of the pin 2 inserted through 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 whether the through holes 102 are overlapping each other.

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

[0035] In the first embodiment, a protrusion 30 was formed on the nut 4 and a recess 44 was formed on the spacer 6, but the disclosure is not limited to this form. In some embodiments, although not shown, the spacer 6 includes a protrusion that projects in a hemispherical shape toward the nut 4 and has an exit 38 for the insertion hole 34. The nut 4 includes a recess having a seating surface in which the inner diameter of the screw hole 29 decreases as it extends from the entrance 31 toward the exit 33 of the screw hole 29, and includes a recess into which at least a part of the aforementioned protrusion can be inserted.

[0036] According to the first embodiment, the spacer 6 prevents contact between the nut 4 and the second splice plate 100B, thereby preventing damage to the second splice plate 100B.

[0037] According to the inventors' findings, in order to achieve alignment of the through holes 102, it is necessary for the main body 10 to move along the horizontal direction D2 while it is inserted through the insertion hole 34 of the spacer 6. In other words, by appropriately setting the difference between the inner diameter φ1 and the outer diameter φ2, alignment of the through holes 102 can be achieved.

[0038] If the difference between the inner diameter φ1 and the outer diameter φ2 is too small, the swing range of the main body 10 will decrease, and the amount of horizontal displacement D2 into which the pin 2 can be inserted into the spacer 6 will decrease. In other words, if the displacement between the through holes 102 becomes large, alignment may become difficult. On the other hand, if the difference between the inner diameter φ1 and the outer diameter φ2 becomes too large, the main body 10 may move excessively along the horizontal direction D2. In the first embodiment, since 0.9φ1 > φ2 is satisfied, even if the displacement 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, excessive movement of the main body 10 along the horizontal direction D2 can be suppressed.

[0039] According to the first embodiment, as illustrated and explained in Figure 3, the tapered portion 12 is configured to have an angle θ of approximately 3 degrees. By having an angle θ of approximately 3 degrees, the force required to move the main body portion 10 inserted into the through hole 34 is reduced, and the torque required for aligning the through holes 102 can be reduced.

[0040] According to the first embodiment, since the pin 2 includes a large-diameter portion 8, 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 rotating the large-diameter portion 8 in the opposite direction to the first direction.

[0041] <Second Embodiment> The alignment jig 1B(1) according to the second embodiment of this disclosure will now be described. The alignment jig 1B according to the second embodiment differs from the first embodiment in that the first spacer 52 includes a protrusion 53 instead of a nut 4, and the second spacer 54 includes a recess 76 instead of a spacer 6. In the second embodiment, components that are the same as those of the first embodiment are denoted by the same reference numerals, and their detailed description is omitted.

[0042] (composition) Figure 6 is a schematic diagram showing the configuration of the alignment jig 1B according to the second embodiment. As shown in Figure 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 has a threaded hole 29 that includes a female threaded portion 28 which is screwed into the male threaded portion 14. This nut 50 is, for example, a hexagonal nut. The other side of the nut 50 in the extending direction D1 is flush with the surface.

[0044] The first spacer 52 has a cylindrical shape and has a first through-hole 56 through which the male threaded portion 14 can be inserted. The first through-hole 56 penetrates the first spacer 52 along the extending direction D1. Of the openings in the first spacer 52 formed by the first through-hole 56, one side into which the pin 2 is inserted is designated as the entrance 60 of the first through-hole 56, and the other side through which the pin 2 exits is designated as the exit 58 of the first through-hole 56. When aligning the through-holes 102 of the first spacer 52 using the alignment jig 1B, the first spacer 52 is positioned on the tapered portion 12 side of the nut 50.

[0045] The first spacer 52 includes a hemispherical projection 53. The projection 53 protrudes to the other side in the extending direction D1. This projection 53 has an entrance 60 to the first insertion hole 56.

[0046] In the second embodiment, as shown in Figure 6, the first spacer 52 includes a first inclined surface 62 on the inner circumferential surface 61 defining the first insertion hole 56, the inner diameter of the first insertion hole 56 decreasing 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 extending 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 at an angle of 35 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 of the extending direction D1 (towards the entrance 60 of the first insertion hole 56) is connected to the first straight surface 64.

[0047] The second spacer 54 has a cylindrical shape and has a second through-hole 66 through which the male threaded portion 14 can be inserted. The second through-hole 66 penetrates the second spacer 54 along the extending direction D1. Of the openings in the second spacer 54 formed by the second through-hole 66, one side into which the pin 2 is inserted is designated as the entrance 68 of the second through-hole 66, and the other side from which the pin 2 exits is designated as the exit 70 of the second through-hole 66. When aligning the through-holes 102 of the second spacer 54 using the alignment jig 1B, the second spacer 54 is positioned on the tapered portion 12 side of the first spacer 52.

[0048] The second spacer 54 includes a recess 76 having a seating surface 74 on the inner circumferential surface 72 defining the second insertion hole 66, wherein the inner diameter of the second insertion hole 66 decreases as it extends from the exit 70 toward the entrance 68 of the second insertion hole 66. At least a portion of the convex portion 53 can be inserted into this recess 76. In the second embodiment, the seating surface 74 is curved in a concave shape. In another embodiment, the seating surface 74 extends linearly along the extending direction D1.

[0049] In the second embodiment, as shown in Figure 6, the inner circumferential surface 72 of the second spacer 54 further includes a second inclined surface 78 that extends from the entrance 68 of the second insertion hole 66 toward the exit 70 of the second insertion hole 66, the inner diameter of the second insertion hole 66 decreasing as it extends, 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] (Effects / Actions) The operation and effects of the alignment jig 1B according to the second embodiment will now be described. Figure 7A is a diagram illustrating the operation and effects of the alignment jig 1B according to the second embodiment, showing the state just before the pin 2 is inserted through the composite through hole 103 and the first spacer 52 comes into contact with the second spacer 54. Figure 7B is a diagram illustrating the operation and effects of the alignment jig 1B according to the second embodiment, and is an enlarged view of the second region B shown in Figure 7A.

[0051] In order to bolt the first splice plate 100A and the second splice plate 100B to the flange 100C, the first splice plate 100A is superimposed on one side of the flange 100C, and the second splice plate 100B is superimposed 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 superimposed so that at least a portion 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 offset from each other.

[0052] According to the second embodiment, the main body 10 of the pin 2 is inserted through 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, thereby suppressing the generation of noise and allowing the main body 10 to be inserted more smoothly into the through hole 102. Once at least a portion of the male thread portion 14 is positioned on the opposite side of the large diameter portion 8, with the second splice plate 100B in between, 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 portion of the male thread portion 14. The second spacer 54 is then brought into contact with the surface 104 of the second splice plate 100B.

[0053] With the male threaded portion 14 inserted into the threaded hole 29 of the nut 50, rotating the nut 50 causes the nut 50 to press against the first spacer 52, causing the first spacer 52 to come into contact with 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 is close to the first splice plate 100A. At this time, the tapered surface of the tapered portion 12 acts as a guide surface, shifting the horizontal position D2 of at least one of the first through hole 102A, the second through hole 102B, and the third through hole 102C, so that 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, compared to conventional ball cores, which align the through holes 102 by being hammered into the composite through hole 103 with a metal hammer or the like, noise generation can be suppressed. Furthermore, the pin 2 may be used as a temporary bolt for temporary fastening by being inserted through the composite through hole 103.

[0054] Furthermore, as shown in Figure 7B, the rotation of the nut 50 causes the protrusion 53 of the first spacer 52 to enter the recess 76 of the second spacer 54, causing the protrusion 53 to interfere with the seating surface 74. The seating surface 74 acts as a guide surface, correcting the tilt of the first spacer 52 and the misalignment of its horizontal position D2, so that the center line L5 of the first spacer 52 aligns with the center line L6 of the second spacer 54. As a result of this correction of the position of the first spacer 52, the centers of the first through hole 102A, the second through hole 102B, and the third through hole 102C are aligned with even greater precision via the main body 10 (especially the tapered portion 12). In other words, the eccentricity of the pin 2 inserted through 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 whether the through holes 102 are overlapping 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) relating to this disclosure is An alignment jig for aligning through holes (102) formed in each of multiple building materials (100) that make up a building, A pin including a main body portion (10) through which the through hole can be inserted, the pin (2) including a tapered portion (12) that decreases in diameter towards the tip of the main body portion and a male threaded portion (14) located closer to the tip of the main body portion than the tapered portion, The nut (4) has a screw hole (29) formed therein, which includes a female screw portion (28) that is screwed into the male screw portion, The nut includes a convex portion (30) that protrudes in a hemispherical shape and has an entrance (31) to the screw hole.

[0057] According to the configuration described in [1] above, by rotating the nut with the male threaded portion inserted into the screw hole, the main body is inserted deeply into the through holes, and the tapered portion aligns the through holes. Therefore, compared to conventional ball cores that align the through holes by being hammered into them with a metal hammer or the like, noise generation can be suppressed. Furthermore, since the nut includes a convex portion that protrudes in a hemispherical shape and has an entrance to the screw hole, by preparing an interfering object that interferes with the convex portion, the tilt of the nut and the misalignment of the nut in the horizontal direction (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 whether the through holes are overlapping.

[0058] [2] In some embodiments, in the configuration described in [1] above, The cylindrical spacer has a through hole (34) through which the male threaded portion can be inserted, and further comprises a spacer (6) located on the tapered portion side of the nut.

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

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

[0061] According to the configuration described in [3] above, the convex portion is inserted into the concave portion, causing it to interfere with the seating surface, thereby correcting the tilt of the nut and any horizontal misalignment of the nut. This further improves the accuracy of the alignment of the through holes.

[0062] [4] In some embodiments, in the configuration described in [3] above, The inner circumferential surface of the insertion hole further includes a straight surface (46) that extends 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 inventors' findings, in order to achieve high-precision alignment of through holes, it is necessary for the main body to move horizontally while it is inserted through the insertion hole of the spacer. With the configuration described in [4] above, a spacer having an inner diameter capable of achieving high-precision alignment of through holes can be prepared.

[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 straight surface is φ1, and the outer diameter of the male thread portion is φ2, The condition 0.9φ1 > φ2 is satisfied.

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

[0066] [6] In some embodiments, in the configuration described in [5] above, The condition 0.5φ1 < φ2 is satisfied.

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

[0068] [7] In some embodiments, in the configuration described in any one of [1] to [6] above, Let the direction in which the pin extends be the extension direction (D1), and when the pin is cut along the extension direction and viewed, The angle (θ) formed by the imaginary straight line (L1) passing through one end (24) of the tapered portion in the extending direction and the other end (26) of the tapered portion in the extending direction, and the axis (L2) of the pin, is approximately 3 degrees.

[0069] According to the configuration described in [7] above, the tapered portion allows the through holes to pass through smoothly, thus reducing the torque required to rotate the nut.

[0070] [8] In some embodiments, in the configuration described in any one of [1] to [7] above, The pin is located on the opposite side of the tapered portion from the male threaded portion, and further includes a large-diameter portion (8) that is larger in diameter than the main body portion. The large-diameter portion has a hexagonal cross-sectional shape when cut by 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 building materials by accessing the large-diameter portion with a tool such as a wrench and rotating the large-diameter portion.

[0072] [9] The alignment jig (1B) relating to this disclosure is An alignment jig for aligning through holes (102) formed in each of multiple building materials (100) that make up a building, A pin including a main body portion (10) through which the through hole can be inserted, the pin (2) including a tapered portion (12) that decreases in diameter towards the tip of the main body portion and a male threaded portion (14) located closer to the tip of the main body portion than the tapered portion, A nut (50) having a screw hole (29) formed therein, which includes a female screw portion (28) that is screwed into the male screw portion, A cylindrical first spacer having a first insertion hole (56) through which the male thread portion can be inserted, comprising a first spacer (52) located on the tapered portion side of the nut, A cylindrical second spacer having a second insertion hole (66) through which the male thread portion can be inserted, comprising a second spacer (54) located on the tapered side of the first spacer, The first spacer includes a convex portion (53) that protrudes in a hemispherical shape and has an entrance (60) to the first through hole, The second spacer is a recess having a seating surface (74) on its inner circumferential surface (72) such that the inner diameter of the second insertion hole decreases as it extends from the exit (70) of the second insertion hole toward the entrance (68) of the second insertion hole, and includes a recess (76) into which at least a portion of the protrusion can be inserted.

[0073] According to the configuration described in [9] above, by rotating the nut with the male threaded portion inserted into the screw hole, the main body is inserted deeply into the through holes, and the tapered portion aligns the through holes. Therefore, compared to conventional ball cores that align the through holes by being hammered into the through holes with a metal hammer or the like, noise generation can be suppressed. Furthermore, since the first spacer includes a convex portion that protrudes in a hemispherical shape and has an entrance to the first insertion hole, by inserting the convex portion into the concave portion, the convex portion interferes with the seating surface, correcting the tilt of the first spacer and the horizontal displacement of the first spacer, and enabling high-precision alignment of the through holes. In this way, the centers of the through holes can be aligned regardless of whether the through holes are overlapping. [Explanation of symbols]

[0074] 1. Alignment jig 1A Alignment jig (first embodiment) 1B Alignment jig (second embodiment) 2 pins 4 nuts 6 Spacers 8. Large diameter section 10 Main body 12 Tapered section 13 Connection part 14 Male threaded section 16 Extension 18 Tip 20 Tip 22 Proximal end 24 One end of the tapered section 26 Other end of the tapered section 28 Female thread section 29 screw holes 30. Protrusion (First Embodiment) 31 Entrance to the screw hole 33. Exit of screw hole 34 Through hole 36. Inner surface of the spacer 38 Exit of the insertion hole 40 Entrance to the insertion hole 42 Seat surface (first embodiment) 44 Recess (First Embodiment) 46 Straight surface 50 Nut (Second Embodiment) 52 First Spacer 53. Protrusion (Second Embodiment) 54 Second Spacer 56 First insertion hole 58 Exit of the first insertion hole 60 Entrance to the first insertion hole 61 Inner surface of the first spacer 62 1st slope 64 1st straight plane 66 Second insertion hole 68 Entrance to the second insertion hole 70 Exit of the second insertion hole 72 Inner surface of the second spacer 74 Seat surface (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 Surface of the second splice plate A 1st area B 2nd area D1 Extending direction D2 horizontal direction L1 straight line L2 pin axis L3 Nut centerline (First embodiment) L4 Spacer centerline (First embodiment) L5 Centerline of the first spacer (second embodiment) L6 Centerline of the second spacer (second embodiment)

Claims

1. An alignment jig for aligning through holes formed in each of multiple building materials that make up a building, A pin including a main body portion through which the through hole can be inserted, the pin including a tapered portion that decreases in diameter towards the tip of the main body portion and a male threaded portion located closer to the tip of the main body portion than the tapered portion, The nut comprises a screw hole formed therein, which includes a female screw portion that is screwed into the male screw portion, The nut includes a convex portion that protrudes in a hemispherical shape and has an entrance to the screw hole, A cylindrical spacer having an insertion hole through which the male threaded portion can be inserted, further comprising a spacer located on the tapered portion side of the nut, The spacer is a recess having a seating surface on its inner circumferential surface in which the inner diameter of the insertion hole decreases as it extends from the exit of the insertion hole toward the entrance of the insertion hole, and includes a recess into which at least a portion of the protrusion can be inserted. The pin is located on the opposite side of the tapered portion from the male threaded portion, and further includes a larger diameter portion that is larger in diameter than the main body portion. Alignment jig.

2. The inner circumferential surface further includes a straight surface that extends from the entrance of the insertion hole toward the exit of the insertion hole while maintaining the inner diameter of the insertion hole. The alignment jig according to claim 1.

3. If the inner diameter of the portion of the insertion hole defined by the straight surface is φ1, and the outer diameter of the male thread portion is φ2, 0.9φ1 > φ2 satisfies, The alignment jig according to claim 2.

4. Satisfying 0.5φ1 < φ2, The alignment jig according to claim 3.

5. If the direction in which the pin extends is defined as the extension direction, and the pin is cut along the extension direction and viewed, The angle formed by the imaginary straight line passing through one end of the tapered portion in the extending direction and the other end of the tapered portion in the extending direction, and the axis of the pin, is approximately 3 degrees. The alignment jig according to any one of claims 1 to 4.

6. The large-diameter portion has a hexagonal cross-sectional shape when cut by a plane perpendicular to the extending direction of the pin. The alignment jig according to any one of claims 1 to 4.

7. An alignment jig for aligning through holes formed in each of multiple building materials that make up a building, A pin including a main body portion through which the through hole can be inserted, the pin including a tapered portion that decreases in diameter towards the tip of the main body portion and a male threaded portion located closer to the tip of the main body portion than the tapered portion, A nut having a screw hole formed therein, which includes a female screw portion that is screwed into the male screw portion, A cylindrical first spacer having a first insertion hole through which the male thread portion can be inserted, the first spacer being located on the tapered portion side of the nut, A cylindrical second spacer having a second insertion hole through which the male thread portion can be inserted, the second spacer being located on the tapered side of the first spacer, The first spacer includes a convex portion that protrudes in a hemispherical shape and has an entrance to the first insertion hole, The second spacer is a recess having a seating surface on its inner circumferential surface in which the inner diameter of the second insertion hole decreases as it extends from the exit of the second insertion hole toward the entrance of the second insertion hole, and includes a recess into which at least a portion of the protrusion can be inserted. The pin is located on the opposite side of the tapered portion from the male threaded portion, and further includes a larger diameter portion that is larger in diameter than the main body portion. Alignment jig.

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