Column base alignment tool

Abstract

The present invention provides a column base position adjustment jig that allows for adjustment of the column base position relative to the foundation even when foundation beams are not provided, and that also allows for flexible adjustment of the height of the position adjustment. [Solution] The column base alignment tool 1 is used to align the column base B with respect to the foundation F when fixing the column base B to the foundation F. The column base alignment tool 1 comprises a lever body 2 having an elongated shape, a first projection 3 provided at the first end 21 of the lever body 2 and projecting from the lever body 2 in a direction perpendicular to the longitudinal direction of the lever body 2, and a second projection 4 located at the first end 21 and projecting from the lever body 2 in the opposite direction to the first projection 3.

Description

[Technical Field]

[0001] The present invention relates to a column base positioning tool, and particularly to a column base positioning tool used for positioning a column base with respect to a foundation. [Background Art]

[0002] The lower end of a column is called a column base, and is firmly fixed to a foundation, which is a substructure, to support a building. Conventionally, a method called "exposed type", in which the column base is fixed to the foundation by connecting anchor bolts embedded in the foundation to a base plate fixed to the column base, has been widespread. To explain the method for fixing an exposed column base, the base plate is formed with mounting holes through which anchor bolts can be inserted, and the column base is mounted to the foundation via the base plate by inserting the anchor bolts into the mounting holes and tightening them. At this time, in order to fix the column base at an accurate position, a positioning operation for the column base is required.

[0003] Patent Document 1 describes a position adjustment jig capable of adjusting the position of a column base relative to a foundation. The position adjustment jig described in Patent Document 1 is attached between the foundation and the column base, and includes an extending member whose protruding length from the foundation can be changed. An operator can position the column base by changing the extension length of the extending member relative to the foundation. [Prior Art Documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2024-052019 [Summary of the Invention] [Problem to be Solved by the Invention]

[0005] Although the position of the column base can be adjusted using the position adjustment jig described in Patent Document 1, further improvements were desired. Specifically, when adjusting the position of the column base using the position adjustment jig described in Patent Document 1, two position adjustment jigs had to be attached to each foundation beam, and each position adjustment jig had to be operated in sequence. Therefore, when adjusting the position of the column base for four foundation beams, the position adjustment work had to be repeated eight times, and a reduction in the work time related to position adjustment was desired. Furthermore, the position adjustment jig described in Patent Document 1 must be attached to a predetermined position on the foundation beam and used in a specified manner, which limits the degree of freedom for workers when aligning the column base, and there was a desire for improved work efficiency.

[0006] The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to provide a column base alignment tool that can easily align the column base with respect to the foundation. Another object of the present invention is to provide a column base alignment tool that can improve the degree of freedom in column base alignment work and thereby improve work efficiency. [Means for solving the problem]

[0007] The aforementioned problem is solved by the column base alignment tool of the present invention, which is used to align the column base with respect to a foundation when fixing the column base to the foundation, and comprises a lever body having an elongated shape, a first projection provided at one end of the lever body in the longitudinal direction and projecting from the lever body in a direction perpendicular to the longitudinal direction of the lever body, and a second projection located at the one end and projecting from the lever body in the direction opposite to the first projection.

[0008] According to the above configuration, the column base alignment tool comprises a lever body having an elongated shape, a first projection provided at one end of the lever body that protrudes in a direction perpendicular to the longitudinal direction, and a second projection that protrudes in the opposite direction to the first projection. Therefore, the column base can be aligned using the principle of leverage, making it possible to easily align the column base with the foundation. Furthermore, by changing the orientation of the column base alignment tool, the first and second protrusions of the tool can be effectively utilized to align the column base. This increases the degree of freedom in the alignment work, thereby improving work efficiency.

[0009] Furthermore, the lever body portion is located between the longitudinal central portion, the first protrusion, and the second protrusion, and has a column base contact portion that contacts a base plate provided at the lower end of the column base, and the column base contact portion preferably has a flat contact surface. According to the above configuration, the column base alignment tool has a column base contact portion that contacts the base plate, and the column base contact portion has a flat contact surface. Therefore, the worker can effectively perform the alignment work by bringing the column base contact portion into contact with the base plate at the appropriate angle.

[0010] Furthermore, the protrusion amounts of the first protrusion and the second protrusion should be different from each other. According to the above configuration, by switching the column base alignment tool, the column base can be aligned by effectively utilizing the first and second protrusions, even if the dimensions between the column base and the foundation are different.

[0011] Furthermore, the first and second protrusions are preferably provided on the lever body at equal positions in the longitudinal direction. According to the above configuration, interference between the first and second protrusions and the column base or foundation is suppressed in the limited space between the column base and the foundation, thereby improving the work efficiency related to alignment work.

[0012] Furthermore, it is preferable to provide a third projection on the other end of the lever body, which is located opposite to the one end, and which protrudes from the lever body in a direction perpendicular to the longitudinal direction, and a fourth projection located at the other end, which protrudes from the lever body in the direction opposite to the third projection. With the above configuration, by changing the orientation of the column base alignment tool, the third and fourth protrusions of the column base alignment tool can be effectively utilized to align the column base. Therefore, the degree of freedom in the alignment work is improved, thereby improving work efficiency.

[0013] Furthermore, the fourth projection may extend from the tip of the other end of the lever body in a direction opposite to the third projection, inclined with respect to the longitudinal direction. According to the above configuration, since the fourth projection extends at an angle with respect to the longitudinal direction of the lever body, the tip of the fourth projection can be fixed to the foundation or column base to align the column base. Therefore, the degree of freedom in the alignment work is improved, thereby improving work efficiency.

[0014] Furthermore, the sum of the protrusion amount of the third protrusion from the lever body and the protrusion amount of the fourth protrusion from the lever body is preferably smaller than the sum of the protrusion amount of the first protrusion from the lever body and the protrusion amount of the second protrusion from the lever body. According to the above configuration, even if it is not possible to place one end of the alignment tool between the column base and the foundation, the opposite end can be placed to align the column base, thereby improving the flexibility of the alignment work. [Effects of the Invention]

[0015] According to the alignment tool of the present invention, it is possible to easily align the column base with the foundation. Furthermore, the alignment tool of the present invention improves the degree of freedom in the alignment work of column bases, thereby improving work efficiency. [Brief explanation of the drawing]

[0016] [Figure 1] It is a perspective view showing a state before a column base is assembled to a foundation of a building. [Figure 2] It is a perspective view showing a state after a column base is assembled to a foundation of a building. [Figure 3] It is a perspective view of a column base positioning tool. [Figure 4] It is a front view of a column base positioning tool. [Figure 5] It is a side view of a column base positioning tool. [Figure 6] It is a side view showing an example of use of a column base positioning tool. [Figure 7] It is a side view showing another example of use of a column base positioning tool. [Figure 8] It is a side view showing another example of use of a column base positioning tool. [Figure 9] It is a top view showing another example of use of a column base positioning tool. MODE FOR CARRYING OUT THE INVENTION

[0017] Hereinafter, a column base positioning tool 1 according to an embodiment of the present invention (hereinafter, this embodiment) will be described with reference to FIGS. 1 to 9. However, the embodiment described below is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. That is, the present invention can be modified and improved without departing from the gist thereof, and it goes without saying that equivalents thereof are included in the present invention.

[0018] <Overview of Foundation F and Column Base B> First, an overview of a foundation F of a building and a column base B fixed to the foundation F will be described with reference to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the foundation F includes a column base foundation F1 to which the column base B is fixed, and a foundation beam F2 extending laterally from the column base foundation F1. The column base foundation F1 is a foundation structure that supports the column base B. Four anchor bolts F11 and column support brackets F12 are embedded in the column base foundation F1. The anchor bolts F11 and column support brackets F12 are used to assemble the column base B to the column base foundation F1. Furthermore, on the upper surface F1a of the column base foundation F1, there are markings F3 indicating the fixed position of the column base B. Specifically, four markings F3 are drawn extending in four directions from the center of the column base foundation F1. These markings F3 are used when aligning the column base B with respect to the column base foundation F1.

[0019] The foundation beam F2 is connected to the column base foundation F1 at its tip F21, and together with the column base foundation F1, it supports the building. The tip F21 of the foundation beam F2 has a central projection F211 that protrudes in the longitudinal direction of the foundation beam F2, and side parts F212 located on both sides of the central projection F211. By providing the central projection F211 at the tip F21 of the foundation beam F2, the column base foundation F1 and the foundation beam F2 are firmly connected to each other. The upper surface F2a of the foundation beam F2 is located above the upper surface F1a of the column base foundation F1.

[0020] Column base B is an exposed column base. Specifically, column base B has a column B1 and a base plate B2 located at the lower end of column B1. Column B1 is a square steel pipe, but is not limited to this. Column B1 may also be a circular steel pipe. The base plate B2 is a plate-like body fixed to the lower end of the column B1 by welding. The base plate B2 is provided with an assembly hole B2a and an assembly frame (not shown). The assembly hole B2a penetrates the base plate B2 vertically and has a hole diameter larger than the diameter of the anchor bolt F11 embedded in the column base foundation F1. The assembly frame is provided in the center of the lower surface of the base plate B2 and has a shape corresponding to the column support F12 embedded in the column base foundation F1. Therefore, as will be explained below, the column base B can be fixed to the column base foundation F1 via the base plate B2.

[0021] Four marking lines B3 are drawn on the side B2d of the base plate B2. Specifically, the marking lines B3 extend vertically from the center of the side B2d of the base plate B2. Marking lines B3 are used when aligning the column base B with the column base foundation F1.

[0022] When fixing column base B to column base foundation F1, column base B is first suspended from above and lowered over column base foundation F1. Then, column support F12 is assembled to the assembly frame, and anchor bolts F11 are inserted through assembly holes B2a and fastened with fastening nuts F13, thereby allowing column base B to be assembled to column base foundation F1. Here, the diameter of the assembly hole B2a is larger than the diameter of the anchor bolt F11. Therefore, column base B may be assembled in a position that is horizontally off-center relative to column base foundation F1. More specifically, it may be assembled in a position different from the correct position where the four ground markings F3 drawn on column base foundation F1 and the four marking lines B3 drawn on base plate B2 overlap vertically. Column base alignment tool 1 is used in such cases to align column base B to the correct position relative to column base foundation F1. Details of column base alignment tool 1 will be described later.

[0023] <Column base alignment tool 1> Next, the column base alignment tool 1 will be described with reference to Figures 3 to 5. Figures 3 to 5 are perspective views, front views, and side views of the column base alignment tool 1, respectively. The column base alignment tool 1 is used to align column base B with column base foundation F1 using the principle of leverage. By using the principle of leverage, the worker can easily align column base B with column base foundation F1 with minimal force.

[0024] The column base alignment tool 1 is a steel tool and mainly consists of a lever body 2, a first projection 3, a second projection 4, a third projection 5, and a fourth projection 6. The first projection 3 and the second projection 4 are provided on the first end 21, which is one end in the longitudinal direction of the lever body 2, while the third projection 5 and the fourth projection 6 are provided on the second end 22, which is the opposite end. The first end 21 corresponds to one end of the present invention, and the second end 22 corresponds to the other end of the present invention.

[0025] As shown in Figures 3 to 5, the lever body 2 has an elongated shape. The total length (lengthwise dimension) of the lever body 2 is approximately 30 cm, but is not limited to this. The lever body 2 functions as an operating part that is grasped by the worker and operated when aligning the column base B with the column base foundation F1.

[0026] Furthermore, the lever body 2 has a first end contact portion 23 and a second end contact portion 24 that come into contact with the base plate B2 provided on the lower end of the foundation beam F2 or column base B when aligning the column base B with the column base foundation F1.

[0027] The first projection 3 is located at the first end 21 of the lever body 2 and protrudes from the lever body 2 in a direction perpendicular to the longitudinal direction of the lever body 2. The first projection 3 has a tip 31, a vertical surface 32, and an inclined surface 33, and has a tapered shape that narrows towards the tip. More specifically, the vertical surface 32 is a flat surface that extends perpendicularly from the side surface of the lever body 2 toward the tip of the first projection 3. On the other hand, the inclined surface 33 extends inclined from the first end 21 of the lever body 2 toward the tip of the first projection 3 and is connected to the vertical surface 32 via the tip 31. The tip 31 has a curved surface that protrudes toward the tip of the first projection 3.

[0028] The second projection 4 is located at the first end 21 of the lever body 2 and protrudes from the lever body 2 in the opposite direction to the first projection 3. The amount of protrusion of the second projection 4 is smaller than the amount of protrusion of the first projection 3. More specifically, the second projection 4 has a tip 41, a vertical surface 42, and an inclined surface 43. As shown in Figure 3, the tip 41 of the second projection 4 has a flat surface. The second projection 4 is provided on the lever body 2 at a position equal to that of the first projection 3 in the longitudinal direction of the lever body 2.

[0029] The third projection 5 is located on the second end 22 side in the longitudinal direction of the lever body 2 and protrudes from the lever body 2 in a direction perpendicular to the longitudinal direction of the lever body 2 and the protruding directions of the first projection 3 and the second projection 4. The third projection 5 has a tip 51 and a pair of vertical surfaces 52. More specifically, the vertical surfaces 52 are flat surfaces that extend perpendicularly from the side surface of the lever body 2 toward the tip of the third projection 5 and are connected to each other via the tip 51. The tip 51 has a curved surface that protrudes toward the tip of the third projection 5.

[0030] The fourth projection 6 extends from the tip of the second end 22 of the lever body 2 in the opposite direction to the projection direction of the third projection 5, while being inclined with respect to the longitudinal direction of the lever body 2. The fourth projection 6 has a tip portion 61, a first inclined surface 62, and a second inclined surface 63, and has a tapered shape that narrows towards the tip portion 61. More specifically, the first inclined surface 62 and the second inclined surface 63 have flat surfaces and are connected to each other via the tip portion 61. The tip portion 61 has a curved surface that protrudes toward the tip of the fourth projection 6.

[0031] As described above, the column base alignment tool 1 has a first protrusion 3, a second protrusion 4, a third protrusion 5, and a fourth protrusion 6, and the protrusion direction and amount of the first protrusion 3, second protrusion 4, third protrusion 5, and fourth protrusion 6 are different from each other. This allows the worker to effectively perform the alignment work on the column base B by changing the orientation of the column base alignment tool 1. Therefore, the degree of freedom in the alignment work is improved, and work efficiency can be improved.

[0032] Furthermore, a first end contact portion 23 is provided between the longitudinal center of the lever body 2 and the first end portion 21, which comes into contact with the base plate B2 when the column base B is aligned using the column base alignment tool 1. The first end contact portion 23 has a flat contact surface that protrudes from the side surface of the lever body portion 2 in the direction of the protrusion of the second projection portion 4. Therefore, when aligning the column base B by bringing the first end contact portion 23 into contact with the base plate B2, it is possible to align the column base B by bringing the column base alignment tool 1 into contact with the side surface B2d of the base plate B2 at an appropriate angle. However, the invention is not limited to this, and the first end contact portion 23 may further have a flat contact surface that protrudes in the direction of the protrusion of the first projection portion 3. The first end contact portion 23 corresponds to the column base contact portion of the present invention.

[0033] Furthermore, a second end contact portion 24 is provided between the longitudinal center of the lever body 2 and the second end portion 22, which contacts the column base B or foundation F when aligning the column base B using the column base alignment tool 1. The second end contact portion 24 has a flat contact surface.

[0034] <How to use the column base alignment tool 1> Next, we will explain how to use the column base alignment tool 1. Figure 6 is a side view showing an example of the use of the column base alignment tool 1 when aligning the column base B with respect to the column base foundation F1. As shown in Figure 6, the column base alignment tool 1 is positioned such that its first end 21 is located between the tip F21 of the foundation beam F2 and the lower end of the column base B, and its second end 22 is positioned to stand upright. More specifically, the column base alignment tool 1 is positioned such that its first projection 3 is inserted into the gap formed between the column base foundation F1 and the base plate B2, and its first end contact portion 23 contacts the side surface B2d of the base plate B2.

[0035] Next, the second end portion 22 of the column base alignment tool 1 is operated in the direction indicated by arrow A in Figure 6. As a result, the contact portion 24 on the second end side of the column base alignment tool 1 comes into contact with the tip portion F21 of the foundation beam F2.

[0036] When the worker further manipulates the second end 22 of the column base alignment tool 1 in the direction indicated by arrow A in Figure 6, the first end contact portion 23 of the column base alignment tool 1 presses the base plate B2 toward the right in Figure 6. This allows the column base B to be aligned with the column base foundation F1. At this time, the worker can align the column base B using the principle of leverage. More specifically, the second end 22 of the lever body 2, which is operated by the worker, acts as the point of force application, the second end contact portion 24 that abuts against the tip F21 of the foundation beam F2 acts as the fulcrum, and the first end contact portion 23 that abuts against the base plate B2 acts as the point of application. As a result, the worker can easily align the column base B with the foundation F with little force.

[0037] Furthermore, at this time, the vertical surface 32 of the first projection 3 contacts the lower surface of the base plate B2, and the column base alignment tool 1 supports the base plate B2 from below. As a result, the column base B can be aligned while the frictional force between the base plate B2 and the column base foundation F1 is reduced. This makes it possible for the worker to easily align the column base B with the foundation F with less force.

[0038] Figure 7 is a side view showing another example of the use of the column base alignment tool 1. As shown in Figure 7, the column base alignment tool 1 is positioned such that the first end 21 is located between the tip F21 of the foundation beam F2 and the lower end of the column base B, and the second end 22 is positioned to stand upright. More specifically, the column base alignment tool 1 is positioned such that the first projection 3 is inserted into the gap formed between the column base foundation F1 and the base plate B2, and the tip 41 of the second projection 4 abuts against the tip F21 of the foundation beam F2.

[0039] Next, the second end portion 22 of the column base alignment tool 1 is operated in the direction indicated by arrow A in Figure 7. As a result, the first end portion 23 of the column base alignment tool 1 comes into contact with the side surface B2d of the base plate B2.

[0040] When the worker further manipulates the second end 22 of the column base alignment tool 1 in the direction indicated by arrow A in Figure 7, the first end contact portion 23 of the column base alignment tool 1 presses the base plate B2 toward the right in Figure 7. This allows the column base B to be aligned with the column base foundation F1. At this time, the worker can align the column base B using the principle of leverage. More specifically, the second end 22 of the lever body 2, which is operated by the worker, acts as the point of force application, the tip 41 of the second projection 4, which abuts against the tip F21 of the foundation beam F2, acts as the fulcrum, and the first end contact portion 23, which abuts against the base plate B2, acts as the point of application. As a result, the worker can easily align the column base B with the foundation F with little force.

[0041] As described above, by switching the grip on the column base alignment tool 1, the distance from the fulcrum to the point of application of force (L1) can be shortened, and conversely, the distance from the fulcrum to the point of effort (L2) can be lengthened, compared to the case explained with reference to Figure 6. Therefore, by more effectively utilizing the effect generated by the lever principle, it becomes possible to easily align the column base B with the foundation F with a small force.

[0042] Figure 8 is a side view showing yet another example of use of the column base alignment tool 1. As shown in Figure 8, the column base alignment tool 1 is positioned such that the first end 21 is located between the tip F21 of the foundation beam F2 and the lower end of the column base B, and the second end 22 is positioned upward. More specifically, the column base alignment tool 1 is positioned such that the tip 31 of the first projection 3 abuts against the side F212 located at the tip F21 of the foundation beam F2. As mentioned above, the side F212 does not protrude as much in the direction of the tip F21 compared to the central projection F211. Therefore, by bringing the first projection 3, which has a larger projection than the second projection 4, into contact with the side F212, it is possible to position the column base alignment tool 1 in the appropriate location between the foundation beam F2 and the lower end of the column base B.

[0043] Next, the second end portion 22 of the column base alignment tool 1 is operated in the direction indicated by arrow A in Figure 8. As a result, the first end portion 23 of the column base alignment tool 1 comes into contact with the side surface B2d of the base plate B2.

[0044] When the worker further manipulates the second end 22 of the column base alignment tool 1 in the direction indicated by arrow A in Figure 8, the first end contact portion 23 of the column base alignment tool 1 presses the base plate B2 toward the right in Figure 8. This allows the column base B to be aligned with the column base foundation F1. At this time, the worker can align the column base B using the principle of leverage. More specifically, the second end 22 of the lever body 2, which is operated by the worker, acts as the point of force application, the tip 31 of the first projection 3, which abuts against the tip F21 of the foundation beam F2, acts as the fulcrum, and the first end side contact portion 23, which abuts against the base plate B2, acts as the point of application. As a result, the worker can easily align the column base B with the foundation F with little force.

[0045] As described above, the tip 31 of the first projection 3 has a curved surface that protrudes in the direction of the tip of the first projection 3. Therefore, with the tip 31 in contact with the tip F21 of the foundation beam F2, the second end 22 of the column base alignment tool 1 can be smoothly operated in the direction indicated by arrow A in Figure 8. Furthermore, the first end contact portion 23 has a flat contact surface. Therefore, when the first end contact portion 23 contacts the side surface B2d of the base plate B2, the first end contact portion 23 contacts the base plate B2 at an appropriate angle, making it possible to effectively press the column base B toward the right in Figure 8.

[0046] Figure 9 is a top view showing yet another example of use of the column base alignment tool 1. In Figure 9, the marking line B3 and the ground mark F3 are not shown. As shown in Figure 9, the column base alignment tool 1 is positioned such that the second end 22 is located between the tip F21 of the foundation beam F2 and the lower end of the column base B, and the longitudinal direction of the lever body 2 extends along the side B2d of the base plate B2. More specifically, the column base alignment tool 1 is positioned such that the tip 61 of the fourth projection 6 abuts against the tip F21 of the foundation beam F2.

[0047] Next, the first end portion 21 of the column base alignment tool 1 is operated in the direction indicated by arrow A in Figure 9. As a result, the tip portion 51 of the third projection 5 of the column base alignment tool 1 comes into contact with the side surface B2d of the base plate B2.

[0048] When the worker further manipulates the first end 21 of the column base alignment tool 1 in the direction indicated by arrow A in Figure 9, the third projection 5 of the column base alignment tool 1 presses the base plate B2 toward the right in Figure 9. This allows the column base B to be aligned with the column base foundation F1. At this time, the worker can align the column base B using the principle of leverage. More specifically, the first end 21 of the lever body 2, which is operated by the worker, acts as the point of force application, the tip 61 of the fourth projection 6 acts as the fulcrum, and the tip 51 of the third projection 5 acts as the point of application. As a result, the worker can easily align the column base B with the foundation F with less force.

[0049] As described above, the sum of the protrusion amounts of the third protrusion 5 and the fourth protrusion 6 is smaller than the sum of the protrusion amounts of the first protrusion 3 and the second protrusion 4. Therefore, the column base alignment tool 1 can be positioned in the limited space between the tip F21 of the foundation beam F2 and the base plate B2 without having to erect the tool. Furthermore, as shown in Figure 9, the column base alignment tool 1 can be positioned to extend along the side B2d of the base plate B2 to align the column base B. As a result, the worker can perform the alignment work while confirming the position of the marking line B3 relative to the ground mark F3 from above.

[0050] In Figure 9, the third projection 5 of the column base alignment tool 1 is described as contacting the approximate center of the base plate B2 in the width direction (vertical direction in Figure 9) and pressing the base plate B2 toward the right in Figure 9, but it is not limited to this. The third projection 5 may contact a position off-center from the center of the base plate B2 in the width direction. This improves the degree of freedom in the alignment work of the column base B with respect to the foundation F, thereby improving work efficiency.

[0051] The above-described embodiment of the column base alignment tool 1 is merely an example to facilitate understanding of the present invention and does not limit it. In the embodiment described above, when positioning the second end 22 of the column base alignment tool 1 between the tip F21 of the foundation beam F2 and the lower end of the column base B, it was explained that the lever body 2 is positioned so that its longitudinal direction extends along the side surface B2d of the base plate B2, but the tool is not limited to this. The column base alignment tool 1 may also be positioned so that the first end 21 rises from the second end 22. Even in this case, the column base B can be easily aligned with the foundation F, similar to the embodiment described above.

[0052] Furthermore, although the above-described embodiment explained that the first end-side contact portion 23 has a flat contact surface that protrudes in the direction in which the second protrusion 4 protrudes, it is not limited to this. The first end-side contact portion 23 may further have a flat contact surface that protrudes in the direction in which the first protrusion 3 protrudes. Also, the second end-side contact portion 24 may have a flat contact surface. This makes it possible to perform the alignment work effectively using the column base alignment tool 1.

[0053] Furthermore, although the column base alignment tool 1 was described as a steel tool in the embodiments described above, it is not limited to this. It is sufficient that it has the strength necessary to align the heavy column base B with the foundation F, and the column base alignment tool 1 may be a metal tool other than steel. [Explanation of symbols]

[0054] 1. Column base alignment tool 2 Lever body 21 First end (one end) 22 Second end (the other end) 23 First end side contact part (column base contact part) 24 Second end side contact part 3 First protrusion 31 Tip 32 Vertical plane 33 Slope 4 Second protrusion 41 Tip 42 Vertical plane 43 Slope 5 Third protrusion 51 Tip 52 Vertical plane 6 Fourth protrusion 61 Tip 62 First slope 63 Second slope B Column base B1 pillar B2 Base Plate B2a Assembly hole B2d side view B3 Scribble lines F Foundation F1 column base foundation F1a top side F11 Anchor Bolt F12 Column support F13 Fastening Nut F2 foundation beam F2a top F21 Tip F211 Central protrusion F212 Side View F3 Ground Mark

Claims

1. A column base alignment tool used to align the column base with respect to the foundation when fixing the column base to the foundation, The lever body has an elongated shape, A first projection is provided at one end of the lever body in the longitudinal direction and protrudes from the lever body in a direction perpendicular to the longitudinal direction of the lever body, A column base alignment tool characterized by comprising a second projection located at one end and projecting from the lever body in the opposite direction to the first projection.

2. The lever body portion is located between the longitudinal central portion, the first protrusion, and the second protrusion, and has a column base contact portion that contacts a base plate provided at the lower end of the column base. The column base alignment tool according to claim 1, characterized in that the column base contact portion has a flat contact surface.

3. The column base alignment tool according to claim 1, characterized in that the amount of protrusion of the first protrusion and the amount of protrusion of the second protrusion are different from each other.

4. The column base alignment tool according to claim 1, characterized in that the first projection and the second projection are provided on the lever body at equal positions in the longitudinal direction.

5. A third projection is provided on the other end of the lever body, which is located opposite to the one end, and protrudes from the lever body in a direction perpendicular to the longitudinal direction, The column base alignment tool according to claim 1, further comprising a fourth projection located at the other end and projecting from the lever body in the opposite direction to the third projection.

6. The column base alignment tool according to claim 5, characterized in that the fourth projection extends from the tip of the other end of the lever body portion inclined with respect to the longitudinal direction and in the opposite direction to the third projection portion.

7. The column base alignment tool according to claim 5, characterized in that the sum of the amount of protrusion of the third projection from the lever body and the amount of protrusion of the fourth projection from the lever body is smaller than the sum of the amount of protrusion of the first projection from the lever body and the amount of protrusion of the second projection from the lever body.

Images