Structure installation jig and structure installation method

Abstract

To provide a structure installation jig capable of easily and efficiently performing installation work on a base of a structure, and reducing manpower and effort required for the work.SOLUTION: A base 12 comprises a detachable guide jig 21. The guide jig 21 has: a fixed shaft 23 that is fixed coaxially with a first bolt hole 12a between an upper flange 12A and a lower flange 12B to the base 12, and is arranged so that its height can be adjusted, and at an upper end of which a cylindrical part 26B is formed; and an engagement guide pin 24 that can be inserted into the first bolt hole 12a, is engaged from above with the cylindrical part 26B, and is provided coaxially.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a structure installation jig and a structure installation method.

Background Art

[0002] Conventionally, in substations and the like, a gas circuit breaker that opens a power circuit is used when performing inspections and maintenance (see, for example, Patent Document 1). Such a gas circuit breaker is integrally provided on a pedestal assembled with steel materials.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When installing the gas circuit breaker as described above, the gas circuit breaker together with the pedestal is lifted by a crane, and while a person manually pushes and guides the gas circuit breaker to the installation position, it is installed on a base installed on the foundation. At this time, generally, it is necessary to adjust the position of the bolt holes of the pedestal to the bolt holes of the base, and the work of guiding the gas circuit breaker manually takes time and labor, requires a large number of personnel, and is sometimes performed in a narrow space, so it is inefficient, and there is room for improvement in that regard.

[0005] An object of the present invention is to provide a structure installation jig and a structure installation method that can easily and efficiently perform the installation work of a structure on a base, and can reduce the personnel and labor required for the work.

Means for Solving the Problems

[0006] One aspect of the present invention is a structure installation jig used to bolt and install a structure having a second bolt hole coaxially arranged with the first bolt hole at a predetermined fixed position on a base having a first member having a first bolt hole and a second member facing downward with respect to the first member. The structure installation jig includes a guide jig detachable from the base. The guide jig is fixed coaxially with the first bolt hole between the first member and the second member with respect to the base and is arranged so that its height can be adjusted. The guide jig has a fixing shaft with a recess formed at the upper end, and an engagement guide pin that can be inserted into the first bolt hole and is engaged from above with the recess and is provided coaxially therewith.

[0007] Another aspect of the present invention is a structure installation method for installing the structure on the base using the above-described structure installation jig. The method includes a step of fixing the fixing shaft coaxially with the first bolt hole between the first member and the second member on the base, and engaging the engagement guide pin from above with the recess of the fixing shaft; a step of guiding the second bolt hole to the engagement guide pin of the guide jig, installing the structure at a predetermined position of the first member of the base, and arranging the first bolt hole and the second bolt hole coaxially; and a step of removing the guide jig and bolt-fastening using the first bolt hole and the second bolt hole.

[0008] According to the present invention, a height-adjustable fixed shaft is provided between a first member and a second member of a base, and an engagement guide pin 24 that passes through a first bolt hole of the first member can be engaged with a recess of the fixed shaft. In this case, since the height of the fixed shaft can be adjusted according to the height between the first member and the second member, the engagement guide pin coaxially supported by the fixed shaft can protrude above the first member. Therefore, when installing the structure on the base, by guiding the second bolt hole to be guided by the engagement guide pin, the first bolt hole and the second bolt hole can be positioned coaxially, and bolt fastening using the first bolt hole and the second bolt hole can be performed efficiently and accurately. Thus, in the present invention, the installation work of the structure on the base can be performed easily and efficiently, and the number of personnel and labor required for the work can be reduced. Further, according to the present invention, the alignment of the structure can be achieved only by a simple operation of attaching a small guide jig to the base in advance. Therefore, even in a narrow space, the work can be performed efficiently, and skilled workers are not required.

[0009] Further, the present invention may be characterized in that the fixed shaft includes a first shaft portion fixed to the second member and having a female screw portion formed at an upper end, and a second shaft portion having a male screw portion screwed into the female screw portion.

[0010] According to the present invention, by adjusting the tightening position of the male screw portion of the second shaft portion with respect to the female screw portion of the first shaft portion, the axial height of the fixed shaft can be adjusted to a desired height. In this case, since it is only a tightening operation, the height adjustment of the fixed shaft can be easily performed even in a small space, and the work efficiency can be improved.

[0011] Further, the present invention may be characterized in that the outer diameter of the upper end of the second shaft portion is larger than the inner diameter of the first bolt hole.

[0012] According to the present invention, the upper end of the second shaft portion can be brought into contact with the lower surface of the first member. That is, the fixed shaft can be fixed in a stable state by taking reaction forces from the first member and the second member. Therefore, the central axis of the fixed shaft does not deviate from the center of the first bolt hole, and the engagement guide pin can be surely engaged with the recess of the fixed shaft disposed on the lower side of the first member from above the first member.

[0013] Further, in the present invention, it is preferable that the upper end of the engagement guide pin has a tapered shape.

[0014] According to the present invention, it becomes easier to align the second bolt hole of the structure with the tapered engagement guide pin. Then, by guiding the second bolt hole along the engagement guide pin and lowering the structure onto the first member, the second bolt hole can be positioned coaxially with the first bolt hole.

[0015] Further, the present invention may be characterized in that a locking female thread is formed on the inner surface of the recess, and a locking male thread that screws into the locking female thread is formed on the lower portion of the engagement guide pin.

[0016] According to the present invention, the engagement guide pin is attached to the fixed shaft by screwing the locking male thread of the engagement guide pin into the locking female thread of the recess of the fixed shaft. Therefore, play and vibration of the engagement guide pin can be suppressed, and the engagement guide pin can be held at a position coaxial with the fixed shaft and the first bolt hole.

[0017] Further, the present invention may be characterized by further comprising a positioning operation jig that can be inserted into the first bolt hole and the second bolt hole simultaneously.

[0018] According to the present invention, with the second bolt hole of the structure engaged with the engagement guide pin, the positioning operation jig is inserted into the other second bolt hole to guide the structure, and the positioning operation jig can be inserted into the other first bolt hole. In this case, since the structure can be guided using the positioning operation jig, the work can be performed more efficiently than when positioning all the second bolt holes to the first bolt hole only with the guide jig.

Effect of the Invention

[0019] According to the structure mounting jig and the structure mounting method according to the present invention, the mounting work of the structure onto the base can be easily and efficiently performed, and the number of personnel and man-hours required for the work can be reduced.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0021] Hereinafter, with reference to the drawings, a structure mounting jig and a structure mounting method according to an embodiment of the present invention will be described.

[0022] The structure installation jig 1 of the embodiment shown in FIG. 1 is a positioning and guiding jig used when installing a structure (the pedestal 10) on the base 12. As the structure, for example, it is a gas circuit breaker (not shown) in a substation or the like. In this embodiment, the pedestal 10 that supports the gas circuit breaker from below is the target.

[0023] As shown in FIGS. 1 and 2, the pedestal 10 is formed of steel and has vertical members 10A and horizontal members 10B (see FIG. 6(a)). In this embodiment, the pedestal 10 supports the gas circuit breaker from below. At the lower end of the vertical member 10A, a fixed end plate 11 with its plate surface facing horizontally is fixed. The fixed end plate 11 has a second bolt hole 11a that penetrates in the thickness direction. The second bolt hole 11a communicates with the first bolt hole 12a of the base 12 described later when the pedestal 10 is arranged at a predetermined fixed position with respect to the base 12. A bolt (not shown) is inserted into the second bolt hole 11a.

[0024] The base 12 is made of H-shaped steel and is installed on a concrete plate-like foundation 13 with its flange surface facing horizontally. Anchor bolts (not shown) protruding upward are embedded in the foundation 13. The first bolt hole 12a of the base 12 and the second bolt hole 11a of the pedestal 10 are coaxially arranged when the pedestal 10 and the base 12 are arranged at predetermined positions with respect to the foundation 13. Note that the anchor bolts are provided at positions that are not coaxial with the above-mentioned first bolt hole 12a and second bolt hole 11a.

[0025] The base 12 has an upper flange 12A (first member) having a first bolt hole 12a and a lower flange 12B (second member) arranged at intervals in the vertical direction. In the region S (see FIG. 3) between the upper flange 12A and the lower flange 12B, the fixed shaft 23 of the structure installation jig 1 described later is arranged during the installation operation of the pedestal 10.

[0026] Next, the specific configuration of the structure installation jig 1 will be described. As shown in Fig. 1, the structure installation jig 1 includes a guide jig 21 detachably attached to the base 12 and a positioning operation jig 22 for guiding the gantry 10. The structure installation jig 1 is formed of a member made of metal such as stainless steel, for example.

[0027] As shown in Figs. 3 to 5, the guide jig 21 is fixed coaxially with the first bolt hole 12a between the upper flange 12A and the lower flange 12B with respect to the base 12 and is arranged so that its height can be adjusted. The guide jig 21 has a fixed shaft 23 and an engagement guide pin 24. The fixed shaft 23 is insertable into the first bolt hole 12a and is coaxially provided by being inserted into a locking female screw 26c, which will be described later, from above.

[0028] The fixed shaft 23 includes a first shaft portion 25 fixed to the lower flange 12B and having a female screw portion 25A formed at the upper end 25a, and a second shaft portion 26 having a male screw portion 26A screwed into the female screw portion 25A. That is, as shown in Fig. 3, the guide jig 21 is composed of three members: the first shaft portion 25, the second shaft portion 26, and the engagement guide pin 24, and they can be combined with their respective shaft centers O aligned. The guide jig 21 is installed with its shaft center O oriented in the vertical direction when the structure installation jig 1 is in use.

[0029] As shown in Figs. 4 and 5, the first shaft portion 25 is formed in a cylindrical shape, and the female screw portion 25A is formed over the entire axial direction. That is, the female screw portion 25A is formed from the upper end 25a to the lower end 25b of the first shaft portion 25. The lower end 25b of the first shaft portion 25 has a flange portion 251. The male screw portion 26A of the second shaft portion 26 is screwed into the female screw portion 25A from above.

[0030] The second shaft portion 26 has a cylindrical portion 26B (concave portion) provided at the upper end of the male screw portion 26A. A locking female screw 26c is formed on the inner surface of the cylindrical portion 26B. A locking male screw 24a of the engagement guide pin 24, which will be described later, is screwed into the locking female screw 26c from above. As shown in Fig. 3, the outer diameter of the upper end 26a of the cylindrical portion 26B of the second shaft portion 26 is set to be larger than the inner diameter of the first bolt hole 12a.

[0031] As shown in FIG. 4, the fixed shaft 23 can adjust the axial height thereof by tightening the female screw portion 25A of the first shaft portion 25 and the male screw portion 26A of the second shaft portion 26 at a predetermined position. Here, in FIG. 4, reference sign H0 is the minimum height of the fixed shaft 23, reference sign H1 is the adjustable length of the fixed shaft 23, and reference sign H2 is the maximum height of the fixed shaft 23.

[0032] As shown in FIG. 3, the upper end 26a of the cylindrical portion 26B can abut against the lower surface 12c of the upper flange 12A of the base 12. That is, by bringing the lower end 26b of the first shaft portion 25 into contact with the lower flange 12B and the upper end 26a of the second shaft portion 26 into contact with the upper flange 12A to take a reaction force, the fixed shaft 23 can be firmly fixed to the base 12.

[0033] As shown in FIGS. 3 and 5, the engagement guide pin 24 has an upper pin body 24A and a locking male screw portion 24B extending downward from the lower end of the pin body 24A. The upper portion of the pin body 24A has a tapered shape upward. The locking male screw portion 24B is formed with a locking male screw 24a that screws into the locking female screw 26c of the second shaft portion 26. The outer diameter of the engagement guide pin 24 is smaller than that of the first bolt hole 12a and the second bolt hole 11a of the gantry 10 (see FIG. 1) over the entire axial direction, and can be inserted into the first bolt hole 12a and the second bolt hole 11a. The engagement guide pin 24 can adjust the height (the protruding length from the upper surface 12d of the upper flange 12A of the pin body 24A) by screwing the locking male screw 24a into a predetermined position with respect to the locking female screw 26c of the second shaft portion 26.

[0034] As shown in FIGS. 5 and 6, the positioning operation jig 22 has an engagement cylindrical portion 27 and an operation portion 28 that holds the engagement cylindrical portion 27. The engagement cylindrical portion 27 can be inserted into the second bolt hole 11a of the gantry 10 as shown in FIG. 1. The operation portion 28 is rod-shaped and bent at a substantially right angle. The engagement cylindrical portion 27 is provided at the bent tip of the operation portion 28. The outer diameter of the engagement cylindrical portion 27 is smaller than that of the second bolt hole 11a over the entire axial direction, and can be inserted into the second bolt hole 11a. The engagement cylindrical portion 27 may be detachable from the operation portion 28.

[0035] Next, the installation procedure of the structure installation method for installing the gantry 10 (structure) on the base 12 using the above-described structure installation jig 1 will be described with reference to the drawings.

[0036] Here, as shown in FIGS. 6(a) and 6(b), the gantry 10 described in the installation procedure has four vertical members 10A. Second bolt holes 11a are formed in the fixed end plates 11 provided at the lower ends of the respective vertical members 10A. The base 12 is provided in a frame shape in a rectangular shape in plan view, and a pair of fixed end plates 11 located on the long sides of the gantry 10 are fixed to a pair of bases 12 (reference numerals 120 and 121) extending in the longitudinal direction. In this procedure, an example of the installation procedure will be described in which a guide jig 21 is provided on one base 12 (reference numeral 120) to position one pair of fixed end plates 11 (reference numeral 110), and at the same time, a positioning operation jig 22 is used on the other base 12 (reference numeral 121) to position the other pair of fixed end plates 11 (reference numeral 111).

[0037] First, as shown in FIGS. 6(a) and 6(b), the base 12 is installed at a predetermined position on the foundation 13. At this time, the base 12 is fixed by engaging with anchor bolts (not shown) previously embedded in the foundation 13.

[0038] Next, as shown in FIGS. 1, 3, and 6(a), a fixed shaft 23 is fixed coaxially with the first bolt hole 12a in the region S between the upper flange 12A and the lower flange 12B of one base 12 (reference numeral 120). Specifically, after forming a fixed shaft 23 by screwing the male screw portion 25A of the first shaft portion 25 with the male screw portion 26A of the second shaft portion 26 and assembling them, this fixed shaft 23 is inserted into the region S. Then, by adjusting the tightening of the second shaft portion 26, the height of the fixed shaft 23 is adjusted. Note that the position of the upper end 26a of the second shaft portion 26 may be a height that does not contact the upper flange 12A as shown in FIG. 3, but in order to enhance the stability of the fixed shaft 23, it is preferably adjusted to a height at which the upper end 26a of the second shaft portion 26 contacts the lower surface 12c of the upper flange 12A.

[0039] Next, as shown in FIG. 3, it is attached by screwing the locking male screw 24a of the engagement guide pin 24 into the locking female screw 26c formed on the inner surface of the cylindrical portion 26B of the second shaft portion 26 from above. As a result, the pin body 24A of the engagement guide pin 24 protrudes above the upper flange 12A. Here, as shown in FIG. 6(a), on one base 12 (reference numeral 120), the guide jigs 21 are arranged at two positions corresponding to the fixing positions of one pair of fixed end plates 11 (reference numeral 110), and the pin body 24A protrudes from these two positions.

[0040] Next, as shown in FIGS. 6(a) and (b), the positioning operation jig 22 is attached by inserting the engagement cylindrical portion 27 into the second bolt holes 11a of the other pair of fixed end plates 11 (reference numeral 111) of the gantry 10 (see FIG. 2).

[0041] Thereafter, as shown in FIG. 7(a), the second bolt hole 11a is guided by the engagement guide pin 24, and one fixed end plate 11 (reference numeral 110) of the gantry 10 is installed at a predetermined position on the upper flange 12A of one base 12 (reference numeral 120), and the first bolt hole 12a and the second bolt hole 11a are arranged coaxially. At the same time, as shown in FIGS. 2 and 7(a), the operation portion 28 of the positioning operation jig 22 inserted into the second bolt hole 11a of the other fixed end plate 11 (reference numeral 111) is gripped, and the gantry 10 is guided together with the positioning operation jig 22, and the other fixed end plate 11 (reference numeral 111) of the gantry 10 is installed at a predetermined position on the upper flange 12A of the other base 12 (reference numeral 121), and the first bolt hole 12a and the second bolt hole 11a are arranged coaxially.

[0042] Thereafter, as shown in FIGS. 1, 2, 7(a), and (b), either the guide jig 21 on the side of one base 12 (reference numeral 120) or the positioning operation jig 22 on the side of the other base 12 (reference numeral 121) is removed, and after bolt fastening using the first bolt hole 12a and the second bolt hole 11a, the other is removed, and bolt fastening is performed using the first bolt hole 12a and the second bolt hole 11a. As a result, the work of installing the gantry 10 at the predetermined position of the base 12 is completed.

[0043] Next, the operation of the structure mounting jig 1 and the structure mounting method will be described in detail with reference to FIG. 1. The structure mounting jig 1 according to the present embodiment is used to bolt - mount a gantry 10 having a second bolt hole 11a coaxially arranged with the first bolt hole 12a at a predetermined fixed position on a base 12 having an upper flange 12A with a first bolt hole 12a and a lower flange 12B facing downward of the upper flange 12A. The structure mounting jig 1 includes a guide jig 21 detachably attached to the base 12. The guide jig 21 is fixed coaxially with the first bolt hole 12a between the upper flange 12A and the lower flange 12B with respect to the base 12, and is arranged so that its height can be adjusted. The guide jig 21 has a fixed shaft 23 with a cylindrical portion 26B (concave portion) formed at the upper end, and an engagement guide pin 24 that can be inserted into the first bolt hole 12a and is engaged with the cylindrical portion 26B from above and coaxially provided.

[0044] According to the structure mounting jig 1 of the present embodiment, a fixed shaft 23 with adjustable height is provided between the upper flange 12A and the lower flange 12B of the base 12, and an engagement guide pin 24 inserted through the first bolt hole 12a of the upper flange 12A can be engaged with the cylindrical portion 26B of the fixed shaft 23. In this case, since the height of the fixed shaft 23 can be adjusted according to the height between the upper flange 12A and the lower flange 12B, the engagement guide pin 24 supported coaxially with the first bolt hole 12a by the fixed shaft 23 can be made to protrude above the upper flange 12A. Therefore, when mounting the gantry 10 on the base 12, by guiding the second bolt hole 11a to be guided by the engagement guide pin 24, the first bolt hole 12a and the second bolt hole 11a can be positioned coaxially, and bolt fastening using the first bolt hole 12a and the second bolt hole 11a can be performed efficiently and accurately. Thus, in the present embodiment, the work of mounting the gantry 10 on the base 12 can be performed easily and efficiently, and the number of personnel and labor required for the work can be reduced.

[0045] Thus, in this embodiment, the alignment of the gantry 10 can be achieved only by a simple operation of attaching the small guide jig 21 to the base in advance. Therefore, even in a narrow space, the work can be efficiently carried out and skilled workers are not required.

[0046] Further, in this embodiment, the fixed shaft 23 is fixed to the lower flange 12B and includes a first shaft portion 25 having a female screw portion 25A formed at the upper end thereof, and a second shaft portion 26 having a male screw portion 26A screwed into the female screw portion 25A. Therefore, by adjusting the tightening position of the male screw portion 26A of the second shaft portion 26 with respect to the female screw portion 25A of the first shaft portion 25, the axial height of the fixed shaft 23 can be adjusted to a desired height. In this case, since it is only a tightening operation, the height adjustment of the fixed shaft 23 can be easily performed even in a small space, and the work efficiency can be improved.

[0047] Moreover, in this embodiment, the outer diameter of the upper end of the second shaft portion 26 is larger than the inner diameter of the first bolt hole 12a. For this reason, the upper end 26a of the second shaft portion 26 can be brought into contact with the lower surface 12c of the upper flange 12A. That is, the fixed shaft 23 can be fixed in a stable state by taking reaction forces from the upper flange 12A and the lower flange 12B. Therefore, the central axis of the fixed shaft 23 does not deviate from the center of the first bolt hole 12a, and the engagement guide pin 24 can be surely engaged with the cylindrical portion 26B of the fixed shaft 23 disposed below the upper flange 12A from above the upper flange 12A.

[0048] Furthermore, in this embodiment, since the upper end of the engagement guide pin 24 has a tapered shape, it becomes easier to align the second bolt hole 11a of the gantry 10 with the tapered engagement guide pin 24. Then, by guiding the second bolt hole 11a along the engagement guide pin 24 and lowering the gantry 10 onto the upper flange 12A, the second bolt hole 11a can be coaxially positioned with respect to the first bolt hole 12a.

[0049] In addition, in the present embodiment, a locking female thread is formed on the inner surface of the cylindrical portion 26B, and a locking male thread 26c that screws into the locking female thread is formed at the lower portion of the engagement guide pin 24. Therefore, by screwing the locking male thread 26c of the engagement guide pin 24 into the locking female thread 26c of the cylindrical portion 26B of the fixed shaft 23, the engagement guide pin 24 is attached to the fixed shaft 23. Thus, play and wobbling of the engagement guide pin 24 can be suppressed, and the engagement guide pin 24 can be held at a position coaxial with the fixed shaft 23 and the first bolt hole 12a.

[0050] In addition, in the present embodiment, a positioning operation jig 22 that can be simultaneously inserted into the first bolt hole 12a and the second bolt hole 11a is further provided. Therefore, the positioning operation jig 22 can be inserted into the second bolt hole 11a to guide the mount 10, and then the positioning operation jig 22 can be inserted into the first bolt hole 12a. In this case, since the mount 10 can be guided using the positioning operation jig 22, the work can be performed more efficiently than when positioning all the second bolt holes 11a with respect to the first bolt hole 12a using only the guide jig 21.

[0051] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

[0052] For example, in the present embodiment, the mount 10 of the gas circuit breaker of the power transmission equipment is adopted as the target of the structure, but it is not limited to such a structure. In short, a structure having a second bolt hole disposed coaxially with the first bolt hole at a predetermined fixed position on a base having a first member having a first bolt hole and a second member facing downward of the first member can be targeted.

[0053] In addition, in this embodiment, an H-shaped steel having an upper flange 12A and a lower flange 12B is adopted as the base 12, but it is not limited to a base having such a shape. The key is that it may be a base having a first member having a first bolt hole and a second member facing the lower side of the first member. For example, it may be a C-shaped steel material having a U-shaped cross section.

[0054] In this embodiment, an example in which the structure mounting jig 1 includes a guide jig 21 and a positioning operation jig 22 is shown, but a structure mounting jig without the positioning operation jig 22 may also be used.

[0055] Further, the fixed shaft 23 is not limited to having the first shaft portion 25 and the second shaft portion 26 as in the above-described embodiment. The key is that it is fixed coaxially with the first bolt hole between the first member and the second member with respect to the base 12, and is arranged so that the height can be adjusted, and it may be a fixed shaft having a concave portion formed at the upper end.

[0056] Furthermore, the shape of the engagement guide pin is not limited to the upper end of the pin body 24A being tapered as in this embodiment.

Explanation of reference numerals

[0057] 1 Structure mounting jig, 10 Mounting base (structure), 11 Fixed end plate, 11a Second bolt hole, 12 Base, 12A Upper flange (first member), 12B Lower flange (second member), 12a First bolt hole, 13 Foundation, 21 Guide jig, 22 Positioning operation jig, 23 Fixed shaft, 24 Engagement guide pin, 25 First shaft portion, 25A Female screw portion, 26 Second shaft portion, 26A Male screw portion, 26B Cylindrical portion (concave portion), 26a Upper end, 26c Locking male screw, 27 Engagement cylindrical portion

Claims

1. A structure installation jig used to install, by bolting, a structure having a second bolt hole disposed coaxially with the first bolt hole at a predetermined fixed position on a base having a first member having a first bolt hole and a second member facing downward with respect to the first member, comprising a guide jig detachable from the base, wherein the guide jig, is fixed coaxially with the first bolt hole between the first member and the second member with respect to the base, is disposed so as to be height-adjustable, and has a fixing shaft having a concave portion formed at an upper end, and an engagement guide pin that can be inserted into the first bolt hole and is engaged from above with the concave portion and provided coaxially therewith.

2. The fixing shaft, has a first shaft portion fixed to the second member and having a female screw portion formed at an upper end, and a second shaft portion having a male screw portion screwed into the female screw portion, the structure installation jig according to claim 1.

3. The outer diameter of the upper end of the second shaft portion is larger than the inner diameter of the first bolt hole, the structure installation jig according to claim 2.

4. The upper end of the engagement guide pin has a tapered shape, the structure installation jig according to claim 1.

5. A locking female screw is formed on an inner surface of the concave portion, and a locking male screw screwed into the locking female screw is formed at a lower portion of the engagement guide pin, the structure installation jig according to claim 1.

6. further comprising a positioning operation jig capable of being inserted into the first bolt hole and the second bolt hole simultaneously, the structure installation jig according to claim 1.

7. A structure installation method of installing the structure on the base using the structure installation jig according to any one of claims 1 to 6, Fix the fixing shaft coaxially with the first bolt hole between the first member and the second member in the base, and engage the engagement guide pin from above with the concave portion of the fixing shaft; Guide the second bolt hole to the engagement guide pin of the guide jig, install the structure at a predetermined position of the first member of the base, and arrange the first bolt hole and the second bolt hole coaxially; Remove the guide jig and bolt-fasten using the first bolt hole and the second bolt hole; A method for installing a structure, comprising the above steps.

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