JP7724257B2 - Alignment jig - Google Patents

Description

This disclosure relates to an alignment jig that aligns the hole openings in each of the multiple building materials that make up a building.

At a construction site, for example, to bolt together multiple building materials that make up a steel frame, it is necessary to align the holes in the materials beforehand. Traditionally, this was achieved by inserting ball cores into misaligned holes in the materials and then driving the ball cores into them with a tool. However, because the noise generated when driving the ball cores could have a negative impact on neighboring areas, this work had to be avoided during certain times of the day, such as at night, which ultimately contributed to longer construction times.

In order to reduce noise during alignment work, Patent Document 1 proposes an alignment jig that includes a pair of coaxially arranged inclined surface sliding members and a rod-shaped member that is inserted into each of the pair of inclined surface sliding members. When one of the pair of inclined surface sliding members inserted into the hole in the building material is pressed against the other, the pair of inclined surface sliding members slide against each other, sliding the hole in the building material and performing alignment.

Japanese Patent Application Laid-Open No. 2021-031897

However, with the above-mentioned alignment jig, because the rod-shaped member is inserted into each of a pair of inclined surface sliding members, each inclined surface sliding member can only slide the building material hole portion to a position where it abuts against the rod-shaped member. As a result, there is a risk that multiple building material hole portions cannot be aligned accurately.

The purpose of this disclosure is to provide an alignment jig that can accurately align holes in building materials.

1) An alignment jig according to at least one embodiment of the present disclosure includes:
An alignment jig for aligning building material holes provided in each of a plurality of building materials that constitute a building,
a jig body including an extension portion extending in a specified direction, a first protruding portion protruding from the extension portion, a second protruding portion protruding from the extension portion so as to be aligned with the first protruding portion in the specified direction with the plurality of building materials interposed therebetween, and a first screw hole portion provided in the first protruding portion;
a first bolt that is screwed into the first screw hole;
a first insertion rod connected to the first bolt, extending in the specified direction, and inserted into the building material hole from one side in the specified direction;
a second insertion rod connected to the second protruding portion, extending in the specified direction, and inserted into the building material hole from the other side in the specified direction;
Equipped with
the first insertion rod includes a first inclined surface inclined with respect to the specified direction,
the second insertion rod includes a second inclined surface that faces and abuts against the first inclined surface,
When the first insertion rod moves in the specified direction due to rotation of the first bolt, the first inclined surface slides against the second inclined surface.

According to the configuration of 1) above, when the first bolt is tightened while the first insertion rod is sandwiched between the second inclined surface and one of the building material holes, the first insertion rod slides the first inclined surface against the second inclined surface, pushing the building material hole aside and moving toward the other side in the specified direction. This causes the building material hole to slide, allowing the building material hole to be aligned. The extent to which the first insertion rod slides in the building material hole can be freely adjusted by the amount of tightening of the first bolt, so the amount by which the building material hole slides can also be freely adjusted. This allows the building material hole to be aligned with high precision.

2) In some embodiments, the alignment jig described in 1) above,
the first bolt includes a first shaft portion extending in the specified direction,
a first shaft end surface, which is an end surface of the first shaft portion on the first insertion rod side, has a convex or concave curved shape;
A first insertion rod end face, which is an end face of the first insertion rod on the first bolt side, has a concave or convex curved shape that faces and abuts against the first shaft end face.

According to the configuration of 2) above, when the first bolt is tightened, the first shaft end face and the first insertion rod end face slide against each other, making it difficult for the first insertion rod to rotate. As a result, of the rotational force and linear force of the first bolt, only the linear force is easily transmitted to the first insertion rod, allowing the first insertion rod to move and push away the building material hole without changing its rotational position. This prevents the building material hole from rotating when aligning the building material hole. Furthermore, even if a force is generated that attempts to offset the axis of the first insertion rod relative to the axis of the first bolt when sliding the building material hole, the first insertion rod end face slides against the first shaft end face, allowing the first insertion rod to tilt relative to the specified direction, thereby dissipating the force acting on the first insertion rod. This reduces the load on the first insertion rod and prevents damage to the first insertion rod.

3) In some embodiments, the alignment jig described in 2) above,
a first connecting member that connects the first bolt and the first insertion rod so that the first shaft end surface and the first insertion rod end surface are slidable relative to each other;
The first connecting member is releasably attached to the first bolt and the first insertion rod.

With the configuration of 3) above, the first insertion rod can be connected to the first bolt threaded into the first threaded hole using the first connecting member before starting the alignment work. This eliminates the need to insert the first bolt connected to the first insertion rod into the first threaded hole, making the alignment work easier.

4) In some embodiments, the alignment jig according to 1) or 3) above,
The first insertion rod further includes a first curved surface that is convex toward the side opposite to the first inclined surface when viewed along the specified direction.

With the configuration of 4) above, the first curved surface can make surface contact with the hole in the building material, making it easier for the force required for sliding to be transmitted to the hole in the building material, allowing for smooth alignment work.

5) In some embodiments, the alignment jig described in 4) above,
the first insertion rod further includes a first connecting surface connecting the first curved surface and the first inclined surface;
When viewed along the specified direction, the first connection surface is located inside a first virtual circle whose radius centered on the axis of the first insertion rod is the same as the radius of curvature of the first curved surface.

With the configuration of 5) above, the first insertion rod can be made thinner by the amount that the first connection surface is located inside the first imaginary circle. Therefore, when the first insertion rod is inserted into multiple misaligned building material holes, the first insertion rod does not get caught in the building material holes. This allows for smooth alignment of the building material holes.

6) In some embodiments, the alignment jig according to any one of 1) to 5) above,
The first inclined surface has a plurality of first longitudinal grooves formed therein and extending along the specified direction.

With the configuration of 6) above, slippage can be suppressed by the resistance caused by the unevenness of the grooves that occur between the first and second inclined surfaces, which prevents the first inclined surface from slipping in the width direction relative to the second inclined surface and prevents the force transmitted to the hole in the building material due to sliding from escaping. This allows for smooth alignment of the hole in the building material.

7) In some embodiments, the alignment jig according to any one of 1) to 6) above,
the jig body further includes a second screw hole portion provided in the second protrusion portion,
the alignment jig further includes a second bolt that is screwed into the second screw hole portion,
the second insertion rod is connected to the second bolt;
When the second insertion rod moves in the specified direction due to rotation of the second bolt, the second inclined surface slides against the first inclined surface.

According to the configuration of 7) above, when the second bolt is tightened, the second insertion rod can slide the second inclined surface against the first inclined surface, pushing the building material hole aside and moving to one side in the specified direction. The extent to which the second insertion rod slides in the building material hole can be freely adjusted by the amount of tightening of the second bolt, so the amount by which the building material hole slides can also be freely adjusted. This allows for precise alignment of the building material hole.

8) In some embodiments, the alignment jig described in 7) above,
the second bolt includes a second shank extending in the specified direction,
a second shaft end surface, which is an end surface of the second shaft portion on the second insertion rod side, has a convex or concave curved shape;
The second insertion rod end face, which is the end face of the second insertion rod on the second bolt side, has a concave or convex curved shape that faces and abuts against the second shaft end face.

Configuration 8) above provides the same technical advantages as configuration 2) above.

9) In some embodiments, the alignment jig described in 8) above,
a second connecting member that connects the second bolt and the second insertion rod so that the second shaft end surface and the second insertion rod end surface are slidable relative to each other;
The second connecting member is releasably attached to the second bolt and the second insertion rod.

Configuration 9) above provides the same technical advantages as configuration 3) above.

10) In some embodiments, the alignment jig according to any one of 7) to 9) above,
The second insertion rod further includes a second curved surface that is convex toward the side opposite to the second inclined surface when viewed along the specified direction.

Configuration 10) above provides the same technical advantages as configuration 4) above.

11) In some embodiments, the alignment jig described in 10) above,
the second insertion rod further includes a second connecting surface connecting the second curved surface and the second inclined surface;
When viewed along the specified direction, the second connection surface is located inside a second imaginary circle whose radius centered on the axis of the second insertion rod is the same as the radius of curvature of the second curved surface.

Configuration 11) above provides the same technical advantages as configuration 5) above.

12) In some embodiments, the alignment jig according to any one of 7) to 11) above,
The second inclined surface has a plurality of second longitudinal grooves formed therein, the second longitudinal grooves extending in the specified direction.

Configuration 12) above provides the same technical advantages as configuration 6) above.

This disclosure provides an alignment jig that can accurately align holes in building materials.

FIG. 1 is a schematic overall view of an alignment jig 1. 10 is a schematic diagram of a misaligned hole 8 in the building material. FIG. 10 is a schematic diagram of another misaligned building material hole 8. FIG. FIG. 10 is a schematic diagram of the aligned building material hole 8. 2 is a schematic enlarged view of a first bolt 21 and a first insertion rod 110. FIG. 10 is a schematic diagram showing the state when the first shaft end surface 25 and the first insertion rod end surface 111 start to slide against each other. FIG. 2 is a schematic diagram of a first insertion rod 110. 7 is a schematic cross-sectional view of the first insertion rod 110 taken along the line AA in FIG. 6. 7 is a schematic cross-sectional view of the first insertion rod 110 taken along the line BB in FIG. 6. FIG. 10 is a schematic view of a first insertion rod 110 according to another embodiment. 2 is a schematic enlarged view of a second bolt 22 and a second insertion rod 220. FIG. FIG. 2 is a schematic view of a second insertion rod 220. 12 is a schematic cross-sectional view of the second insertion rod 220 taken along the line AA in FIG. 11 . FIG. 10 is a schematic view of a second insertion rod 220 according to another embodiment.

Hereinafter, several embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure.
For example, expressions expressing relative or absolute arrangement such as "in a certain direction,""along a certain direction,""parallel,""orthogonal,""center,""concentric," or "coaxial" not only express such an arrangement exactly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained.
For example, expressions such as "identical,""equal," and "homogeneous" that indicate that something is in an equal state not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained.
For example, expressions representing shapes such as a square shape or a cylindrical shape not only represent shapes such as a square shape or a cylindrical shape in the strict geometric sense, but also represent shapes including uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained.
On the other hand, the expressions "comprise,""include," or "have" one element are not exclusive expressions that exclude the presence of other elements.
Note that the same components will be denoted by the same reference numerals and the description thereof will be omitted.

<Outline of alignment jig 1>
In the example of FIG. 1 , the building materials 9 for which hole alignment is to be performed are a building material 9A and a pair of building materials 9B arranged to sandwich the building material 9A. As an example, the building material 9A is a flange portion of an H-beam that constitutes a frame structure. The pair of building materials 9B are splice plates that can slide along the building material 9A before being bolted to the building material 9A. The alignment jig 1 of this example is used to align the building material hole 8A of the building material 9A with the building material hole 8B of the building material 9B. Hereinafter, the building materials 9A and 9B will be collectively referred to simply as "building material 9," and the building material holes 8A and 8B will be collectively referred to simply as "building material hole 8."

The jig body 10 that constitutes the alignment jig 1 includes an extension portion 15 that extends in a specified direction, a first protrusion portion 11 that protrudes from the extension portion 15, a second protrusion portion 12 that is aligned with the first protrusion portion 11 in the specified direction with the building material 9 in between, a first threaded hole portion 13 that is provided in the first protrusion portion 11, and a second threaded hole portion 14 that is provided in the second protrusion portion 12. When the alignment jig 1 is in a usable state, the specified direction is parallel to the center line of the building material hole portion 8. The first threaded hole portion 13 and the second threaded hole portion 14 are threaded holes whose axial direction is the specified direction and are arranged coaxially with each other.

The alignment jig 1 further includes a first bolt 21, a second bolt 22, a first insertion rod 110, and a second insertion rod 220, all of which are coaxially arranged and extend in a specified direction. The first shank 23 of the first bolt 21 is threaded into the first threaded hole 13 and protrudes toward the second threaded hole 14. Similarly, the second shank 24 of the second bolt 22 is threaded into the second threaded hole 14 and protrudes toward the first threaded hole 13.

The first insertion rod 110 is connected to the first shaft portion 23 and is inserted into the building material hole 8 from one side in the specified direction. The second insertion rod 220 is connected to the second shaft portion 24 and is inserted into the building material hole 8 from the other side in the specified direction. The first insertion rod 110 and second insertion rod 220 are arranged coaxially with each other, have symmetrical shapes in the specified direction, and are both solid shaft members.

The first insertion rod 110 includes a first inclined surface 31 (see Figure 2A) that is inclined relative to the specified direction, and the second insertion rod 220 includes a second inclined surface 32 that faces and abuts against the first inclined surface 31. Due to the presence of the first inclined surface 31 and the second inclined surface 32, the first insertion rod 110 and the second insertion rod 220 have a shape that becomes more pointed toward the tip. The longitudinal directions of the first inclined surface 31 and the second inclined surface 32 are both along the specified direction, and the lateral direction (width direction) is perpendicular to the longitudinal direction.

In this embodiment, when the first insertion rod 110 moves in a specified direction due to rotation of the first bolt 21, the first inclined surface 31 slides against the second inclined surface 32. For example, as shown in FIG. 2A , an operator inserts the first insertion rod 110 and the second insertion rod 220 into misaligned building material holes 8. At this time, the first insertion rod 110 becomes pinched between the second inclined surface 32 and two building material holes 8B. When the operator tightens the first bolt 21, the first insertion rod 110 moves toward the other side of the specified direction (arrow D) while sliding the first inclined surface 31 against the second inclined surface 32. At this time, due to the reaction force received from the second inclined surface 32 of the second insertion rod 220, at least the tip of the first insertion rod 110 displaces in the direction of arrow A, widening the hole. At the same time, as the first bolt 21 is tightened, the first insertion rod 110 slides to the other side of the specified direction on the second inclined surface 32. As a result, the first insertion rod 110 pushes aside the pair of building materials 9B, causing the building material hole 8B to slide (arrows R1 and R2). If tightening of the first bolt 21 is stopped when the two building material holes 8B are coaxial with the building material hole 8A, the alignment of the building material hole 8 is completed as shown in Figure 3.

Similarly, when the second insertion rod 220 moves in a specified direction due to rotation of the second bolt 22, the second inclined surface 32 slides relative to the first inclined surface 31. For example, as shown in FIG. 2B , an operator inserts the first insertion rod 110 and the second insertion rod 220 into misaligned building material holes 8. At this time, the second insertion rod 220 becomes trapped between the first inclined surface 31 and two building material holes 8B. When the operator tightens the second bolt 22, the second insertion rod 220 moves toward the other side of the specified direction while sliding the second inclined surface 32 relative to the first inclined surface 31 (arrow U). At this time, due to the reaction force received from the first inclined surface 31 of the first insertion rod 110, at least the tip of the second insertion rod 220 is displaced so as to tilt toward the direction of arrow B. At the same time, as the second bolt 22 is tightened, the second insertion rod 220 slides toward one side of the specified direction on the first inclined surface 31. As a result, the second insertion rod 220 pushes aside the pair of building materials 9B, causing the building material hole 8B to slide (arrows L1 and L2). When the two building material holes 8B are coaxial with the building material hole 8A, tightening of the second bolt 22 is stopped, and the alignment of the building material hole 8 is complete, as shown in Figure 3.

In this way, in this embodiment, the driving of a ball core is not required when aligning the building material hole 8, making the alignment process quieter. Furthermore, the degree to which the building material hole 8B slides can be freely adjusted by adjusting the tightening amount of the first bolt 21 and the tightening amount of the second bolt 22. This allows the sliding amount of the building material hole 8B to be freely adjusted, allowing for precise alignment of the building material holes 8A and 8B.

<Details of the First Bolt 21 and the First Insertion Rod 110>
As shown in Figure 4, the first shank 23 of the first bolt 21 includes a threaded shank 231 on which a screw thread is formed, and an abutment shank 232 connected to the tip of the threaded shank 231 and abutting against the first insertion rod 110. The abutment shank 232 has a smaller diameter than the threaded shank 231. A ring groove 232c is formed in the abutment shank 232 on the threaded shank 231 side. The ring groove 232c is formed over the entire circumferential length of the first bolt 21, centered on the axis of the first bolt 21. A first shank end surface 25, which is the end face of the abutment shank 232 on the first insertion rod 110 side, has a curved shape concave toward the first screw hole 13.

On the other hand, the first insertion rod end face 111, which is the end face of the first insertion rod 110 facing the first bolt 21, has a curved shape that faces and abuts against the first axial end face 25 of the first bolt 21. The first insertion rod end face 111 illustrated in FIG. 4 is convexly curved toward the first threaded hole portion 13. Furthermore, a ring groove 110c is formed in the portion of the first insertion rod 110 facing the first bolt 21. The depth of the ring groove 110c is the same as the depth of the ring groove 232c of the first bolt 21. The bottom surfaces of the ring groove 110c and the ring groove 232c have the same outer diameter. The depth of the ring groove 110c is the radial dimension of the ring groove 110c based on the axis of the first insertion rod 110, and the depth of the ring groove 232c is the radial dimension of the ring groove 232c based on the axis of the first bolt 21.

The alignment jig 1 illustrated in FIG. 4 further includes a first connecting member 41. The first connecting member 41 connects the first bolt 21 and the first insertion rod 110 so that the first shaft end surface 25 and the first insertion rod end surface 111 are slidable relative to each other. The first connecting member 41 is removably attached to the first bolt 21 and the first insertion rod 110, and more specifically, is removably attached to the ring grooves 232c, 110c. In this example, the first connecting member 41 can be attached from the radial outside relative to the first insertion rod 110 and the first bolt 21.

The technical advantages obtained by adopting the above configuration will be explained with reference to Figures 2A, 4, and 5. When the first bolt 21 is tightened, the first shaft end surface 25 and the first insertion rod end surface 111 slide against each other, so even if the first bolt 21 rotates, the first insertion rod 110 is less likely to rotate with it. As a result, of the rotational and linear forces of the first bolt 21, only the linear force is easily transmitted to the first insertion rod 110, allowing the first insertion rod 110 to move in the specified direction without changing its rotational position and push away the building material hole 8. This prevents the building material 9B from rotating around the first insertion rod 110 when aligning it.

Furthermore, when the first insertion rod 110 shown in Figure 2A moves in a specified direction while pushing aside the building material hole 8 (arrow D), a force is generated that tends to cause the axis of the first insertion rod 110 to become eccentric with respect to the axis of the first bolt 21. For example, a reaction force acts on the tip of the first insertion rod 110, causing it to tilt from the second inclined surface 32, as described above. For another example, if the force in the specified direction from the first bolt 21 is applied in a position that is offset from the center of the first insertion rod 110, the first insertion rod 110 may be subjected to a bending force due to the offset, which could cause it to buckle.

In this regard, in this embodiment, as shown in FIG. 5, the first insertion rod end surface 111 slides against the first shaft end surface 25, allowing the first insertion rod 110 to tilt in the specified direction (this tilt occurs in the first insertion rod 110 throughout the specified direction). This allows the above-mentioned force acting on the first insertion rod 110 to be released, reducing the load on the first insertion rod 110 and preventing damage to the first insertion rod 110.

In other embodiments, the first shaft end surface 25 may have a curved shape that is convex in the direction away from the first threaded hole portion 13. In this case, the first insertion rod end surface 111 has a curved shape that is concave in the direction away from the first threaded hole portion 13, but the first shaft end surface 25 and the first insertion rod end surface 111 can still slide against each other, and both of the above-mentioned advantages of being able to suppress rotation of the first insertion rod 110 and being able to dissipate the reaction force generated by the first insertion rod 110 can be obtained.

Furthermore, by providing a first connecting member 41 that can be detached from the first bolt 21 and the first insertion rod 110, the first bolt 21 threaded into the first threaded hole 13 can be connected to the first insertion rod 110 using the first connecting member 41 before starting the alignment work for the building material hole 8. In other words, there is no need to insert the first bolt 21, which is connected to the first insertion rod 110, into the first threaded hole 13, making the alignment work easier.

Furthermore, after the first insertion rod 110 and the second insertion rod 220 are inserted into the building material hole 8 while separated from the first bolt 21 and the second bolt 22, respectively, the first insertion rod 110 can be attached to the first bolt 21, and the second insertion rod 220 can be attached to the second bolt 22. This reduces the amount of rotation of the first bolt 21 and the second bolt 22 when aligning the building material hole 8 (i.e., the amount of movement of the first insertion rod 110 and the second insertion rod 220 in the specified direction). This reduces the length in the specified direction of the movable parts that make up the alignment jig 1, including the first insertion rod 110 and the second insertion rod 220, and allows the alignment jig 1 to be made more compact.

Referring to Figures 6 to 8, the first insertion rod 110 will be described in more detail. When viewed along the specified direction, the first insertion rod 110 further includes a first curved surface 112 that is convex toward the side opposite the first inclined surface 31. The first curved surface 112 is positioned at least within the specified directional range in which the first inclined surface 31 is positioned. The radius of curvature of the first curved surface 112 is approximately the same as the radius of the building material hole portion 8.

With the above configuration, the first curved surface 112 can come into surface contact with the building material hole 8B, which has a length in the specified direction (see Figure 2A). This makes it easier for the sliding force to be transmitted to the building material hole 8B, allowing for smooth alignment work.

Furthermore, the first insertion rod 110 includes a pair of first connection surfaces 113 connecting the first curved surface 112 and the first inclined surface 31. When viewed along the specified direction, the pair of first connection surfaces 113 are located inside the first virtual circle 91. Here, the first virtual circle 91 is a virtual circle centered on the axis of the first insertion rod 110, whose radius is the same as the radius of curvature of the first curved surface 112. In the illustrated example, the first connection surface 113 is a flat surface, but the present invention is not limited to this and may have a curved shape. For example, the first connection surface 113 may be a concave curved surface that is recessed toward the axis of the first insertion rod 110, or a convex curved surface that is convex away from the axis.

With the above configuration, the first insertion rod 110 can be made thinner by the amount that the first connection surface 113 is located inside the first imaginary circle 91, so when the first insertion rod 110 is inserted into multiple misaligned building material holes 8, the first insertion rod 110 does not get caught in the building material hole 8B. For example, when inserting the first insertion rod 110, the tip of the first insertion rod 110 shown in Figure 8 is inserted first, but by making the tip thinner by the amount that the first connection surface 113 is located inside the first imaginary circle 91, it is possible to prevent the tip from getting caught in the building material hole 8B, allowing for smooth alignment work.

Figure 9 is a schematic diagram showing a first insertion rod 110 according to some embodiments. A plurality of first vertical grooves 115 extending along a specified direction are formed on the first inclined surface 31. The extension direction of the first vertical grooves 115 is parallel to the longitudinal direction of the first inclined surface 31. The multiple first vertical grooves 115 are also spaced apart along the width direction of the first inclined surface 31.

With the above configuration, slippage can be suppressed by the resistance caused by the unevenness of the groove that occurs between the first inclined surface 31 and the second inclined surface 32. Therefore, when the first insertion rod 110 moves to the other side of the specified direction, the first inclined surface 31 can be prevented from slipping widthwise relative to the second inclined surface 32, and the force transmitted to the building material hole 8B to slide can be prevented from escaping. This allows for smooth alignment of the building material hole 8B.

<Details of the Second Bolt 22 and the Second Insertion Rod 220>
10 , the second shank 24 of the second bolt 22 includes a threaded shank 241 having a screw thread formed thereon, and an abutting shank 242 connected to the tip of the threaded shank 241 and abutting against the second insertion rod 220. The abutting shank 242 has a smaller diameter than the threaded shank 241. A ring groove 242c is formed in the abutting shank 242 on the threaded shank 241 side. The ring groove 242c is formed over the entire circumferential length of the second bolt 22, centered on the axis of the second bolt 22. A second shank end surface 26, which is the end surface of the abutting shank 242 on the second insertion rod 220 side, has a curved shape concave toward the second screw hole 14.

On the other hand, the second insertion rod end face 221, which is the end face of the second insertion rod 220 on the second bolt 22 side, has a curved shape that faces and abuts against the second axial end face 26 of the second bolt 22. The second insertion rod end face 221 illustrated in FIG. 10 is convexly curved toward the second threaded hole portion 14. Furthermore, a ring groove 220c is formed in the portion of the second insertion rod 220 on the second bolt 22 side. The depth of the ring groove 220c is the same as the depth of the ring groove 242c of the second bolt 22. The bottom surfaces of the ring groove 220c and the ring groove 242c have the same outer diameter. However, the outer diameters of the two bottom surfaces do not have to be the same, and the outer diameter of one bottom surface may be larger than the outer diameter of the other bottom surface. The depth of the ring groove 220c is the radial dimension of the ring groove 220c based on the axis of the second insertion rod 220, and the depth of the ring groove 242c is the radial dimension of the ring groove 232c based on the axis of the second bolt 22.

The alignment jig 1 illustrated in Figure 10 further includes a second connecting member 42. The second connecting member 42 connects the second bolt 22 and the second insertion rod 220 so that the second shaft end surface 26 and the second insertion rod end surface 221 are slidable relative to each other. The second connecting member 42 is removably attached to the second bolt 22 and the second insertion rod 220, and more specifically, is removably attached to the ring grooves 242c, 220c. In this example, the second connecting member 42 can be attached from the radial outside relative to the second insertion rod 220 and the second bolt 22.

The technical advantages of adopting the above configuration will be explained with reference to Figures 2B and 10. When the second bolt 22 is tightened, the second shaft end surface 26 and the second insertion rod end surface 221 slide against each other, so even if the second bolt 22 rotates, the second insertion rod 220 is less likely to rotate with it. As a result, of the rotational and linear forces of the second bolt 22, only the linear force is easily transmitted to the second insertion rod 220, allowing the second insertion rod 220 to move in the specified direction without changing its rotational position and push away the building material hole 8. This prevents the building material 9B from rotating around the second insertion rod 220 when aligning the bolt.

Furthermore, when the second insertion rod 220 shown in Figure 2B moves while pushing aside the building material hole 8 (arrow U), a force acts that tends to offset the axis of the second insertion rod 220 relative to the axis of the second bolt 22. The details of this force are the same as for the first insertion rod 110, so a detailed explanation will be omitted here.

In this embodiment, the second insertion rod end surface 221 slides against the second shaft end surface 26, allowing the second insertion rod 220 to tilt relative to the specified direction (detailed illustration is omitted, but a tilting phenomenon similar to that of the first insertion rod 110 shown in Figure 5 occurs). This allows the force that tends to cause the axis of the second insertion rod 220 to become eccentric relative to the axis of the second bolt 22 to be released, thereby reducing the load on the second insertion rod 220 and preventing damage to the second insertion rod 220.

The second shaft end surface 26 may have a curved shape that is convex in the direction away from the second threaded hole 14. In this case, the second insertion rod end surface 221 has a curved shape that is concave in the direction away from the second threaded hole 14, but the second shaft end surface 26 and the second insertion rod end surface 221 can still slide against each other, and both of the above-mentioned advantages of being able to suppress rotation of the second insertion rod 220 and being able to release forces that tend to cause the second insertion rod 220 to become eccentric can be obtained.

Furthermore, by providing a detachable second connecting member 42 for the second bolt 22 and the second insertion rod 220, the second bolt 22 threaded into the second threaded hole 14 can be connected to the second insertion rod 220 using the second connecting member 42 before starting the alignment work for the building material hole 8. In other words, the work of inserting the second bolt 22 connected to the second insertion rod 220 into the second threaded hole 14 is no longer necessary, making the alignment work easier.

As shown in Figures 11 and 12, the second insertion rod 220 further includes a second curved surface 222 that is convex toward the side opposite the second inclined surface 32 when viewed along the specified direction. The second curved surface 222 is positioned at least within the specified directional range in which the second inclined surface 32 is positioned. The radius of curvature of the second curved surface 222 is approximately the same as the radius of the building material hole portion 8.

With the above configuration, the second curved surface 222 can come into surface contact with the building material hole 8B, which has a length in the specified direction (see Figure 2B). This makes it easier for the sliding force to be transmitted to the building material hole 8B, allowing for smooth alignment work.

Furthermore, the second insertion rod 220 further includes a pair of second connection surfaces 223 connecting the second curved surface 222 and the second connection surface 223. When viewed along the specified direction, the pair of second connection surfaces 223 are located inside the second imaginary circle 92. Here, the second imaginary circle 92 is an imaginary circle centered on the axis of the second insertion rod 220, whose radius is the same as the radius of curvature of the second curved surface 222. In the illustrated example, the second connection surface 223 is a flat surface, but the present invention is not limited to this and may have a curved shape. For example, the second connection surface 223 may be a curved surface that is concave toward the axis of the second insertion rod 220, or a curved surface that is convex away from the axis.

With the above configuration, the second insertion rod 220 can be made thinner by the amount that the second connection surface 223 is located inside the second imaginary circle 92. Therefore, when the second insertion rod 220 is inserted into multiple misaligned building material holes 8, the second insertion rod 220 does not get caught on the building material holes 8B. This allows for smooth alignment work.

Figure 13 is a schematic diagram showing a second insertion rod 220 according to some embodiments. A plurality of second longitudinal grooves 225 extending along a specified direction are formed on the second inclined surface 32. The extension direction of the second longitudinal grooves 225 is parallel to the longitudinal direction of the second inclined surface 32. The plurality of second longitudinal grooves 225 are also spaced apart along the width direction of the second inclined surface 32.

With the above configuration, the frictional force generated between the second inclined surface 32 and the first inclined surface 31 can be increased, which prevents the second inclined surface 32 from shifting widthwise relative to the first inclined surface 31 when the second insertion rod 220 moves to the other side of the specified direction, preventing the force transmitted to the building material hole 8B for sliding from escaping. This allows for smooth alignment of the building material hole 8B.

<Modification>
The alignment jig 1 shown in FIG. 1 may not include the second threaded hole portion 14 and the second bolt 22, and the second insertion rod 220 may be formed integrally with the second protrusion 12. Even in this case, by tightening the first bolt 21, the first insertion rod 110 can move while sliding the first inclined surface 31 against the second inclined surface 32, thereby aligning the building material hole portion 8. Instead of connecting the first bolt 21 and the first insertion rod 110 via the first connecting member 41 so that they can slide relative to each other, the first connecting member 41 may connect the first bolt 21 and the first insertion rod 110 so that the first insertion rod 110 can rotate relative to the first bolt 21 at a specified direction and angle. A similar modification may be applied to the second connecting member 42.

DESCRIPTION OF SYMBOLS 1: Alignment jig 8, 8A, 8B: Building material hole 9, 9A, 9B: Building material 10: Jig body 11: First protrusion 12: Second protrusion 13: First screw hole 14: Second screw hole 15: Extension 21: First bolt 22: Second bolt 23: First shaft 24: Second shaft 25: First shaft end surface 26: Second shaft end surface 31: First inclined surface 32: Second inclined surface 41: First connecting member 42: Second connecting member 91: First virtual circle 92: Second virtual circle 110: First insertion rod 110c: Ring groove 111: First insertion rod end surface 112: First curved surface 113: First connecting surface 115: First vertical groove 220: Second insertion rod 220c : Ring groove 221 : Second insertion rod end surface 222 : Second curved surface 223 : Second connecting surface 225 : Second vertical groove 231 : Screw shaft portion 232 : Contact shaft portion 232c : Ring groove 241 : Screw shaft portion 242 : Contact shaft portion 242c : Ring groove

Claims (12)

An alignment jig for aligning building material holes provided in each of a plurality of building materials that constitute a building,
a jig body including an extension portion extending in a specified direction, a first protruding portion protruding from the extension portion, a second protruding portion protruding from the extension portion so as to be aligned with the first protruding portion in the specified direction with the plurality of building materials interposed therebetween, and a first screw hole portion provided in the first protruding portion;
a first bolt that is screwed into the first screw hole;
a first insertion rod connected to the first bolt, extending in the specified direction, and inserted into the building material hole from one side in the specified direction;
a second insertion rod connected to the second protruding portion, extending in the specified direction, and inserted into the building material hole from the other side in the specified direction;
Equipped with
the first insertion rod includes a first inclined surface inclined with respect to the specified direction,
the second insertion rod includes a second inclined surface that faces and abuts against the first inclined surface,
An alignment jig configured so that when the first insertion rod moves in the specified direction due to rotation of the first bolt, the first inclined surface slides against the second inclined surface. the first bolt includes a first shaft portion extending in the specified direction,
a first shaft end surface, which is an end surface of the first shaft portion on the first insertion rod side, has a convex or concave curved shape;
An alignment jig as described in claim 1, wherein the first insertion rod end face, which is the end face of the first insertion rod on the first bolt side, has a concave or convex curved shape that faces and abuts against the first shaft end face. a first connecting member that connects the first bolt and the first insertion rod so that the first shaft end surface and the first insertion rod end surface are slidable relative to each other;
The alignment jig according to claim 2 , wherein the first connecting member is removably attached to the first bolt and the first insertion rod. An alignment jig as described in any one of claims 1 to 3, wherein the first insertion rod further includes a first curved surface that is convex toward the opposite side to the first inclined surface when viewed along the specified direction. the first insertion rod further includes a first connecting surface connecting the first curved surface and the first inclined surface;
An alignment jig as described in claim 4, wherein the first connection surface, when viewed along the specified direction, is located inside a first virtual circle whose radius centered on the axis of the first insertion rod is the same as the radius of curvature of the first curved surface. The alignment jig according to claim 1 or 2, wherein the first inclined surface has a plurality of first vertical grooves formed thereon, the first vertical grooves extending along the specified direction. the jig body further includes a second screw hole portion provided in the second protrusion portion,
the alignment jig further includes a second bolt that is screwed into the second screw hole portion,
The alignment jig according to claim 1 or 2, wherein the second insertion rod is connected to the second bolt, and when the second insertion rod moves in the specified direction by rotation of the second bolt, the second inclined surface slides against the first inclined surface. the second bolt includes a second shank extending in the specified direction,
a second shaft end surface, which is an end surface of the second shaft portion on the second insertion rod side, has a convex or concave curved shape;
An alignment jig as described in claim 7, wherein the second insertion rod end face, which is the end face of the second insertion rod on the second bolt side, has a concave or convex curved shape that faces and abuts against the second shaft end face. a second connecting member that connects the second bolt and the second insertion rod so that the second shaft end surface and the second insertion rod end surface are slidable relative to each other;
The alignment jig according to claim 8 , wherein the second connecting member is removably attached to the second bolt and the second insertion rod. The alignment jig according to claim 7 , wherein the second insertion rod further includes a second curved surface that is convex toward the side opposite to the second inclined surface when viewed along the specified direction. the second insertion rod further includes a second connecting surface connecting the second curved surface and the second inclined surface;
An alignment jig as described in claim 10, wherein the second connection surface, when viewed along the specified direction, is located inside a second virtual circle whose radius centered on the axis of the second insertion rod is the same as the radius of curvature of the second curved surface. The alignment jig according to claim 7 , wherein the second inclined surface is formed with a plurality of second vertical grooves extending along the specified direction.