Foundation construction jig and foundation construction method

Abstract

To provide a position confirmation jig with which center position of a column may be easily confirmed upon constructing a foundation of a building.SOLUTION: A position confirmation jig 30 is a jig which is attached to an upper part of an anchor suspension jig 20 for burying a plurality of anchor bolts F2 in a foundation concrete while a part thereof protrudes therefrom, and that is used for confirmation of center position of a column supported by the plurality of anchor bolts F2. The position confirmation jig 30 has a first extending part 31 that passes through a section to be the center position of the column and extends so as to connect a first anchor bolt F2A and a second anchor bolt F2B among the plurality of anchor bolts in top view, and a second extending part 32 that is connected to the first extending part 31 at a section to be the center position of the column, extends in a direction intersecting the extending direction of the first extending part 31, and extends so as to connect the first extending part 31 and a third anchor bolt F2C in a top view.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a position confirmation jig, a foundation construction jig, and a foundation construction method, and more particularly to a position confirmation jig, a foundation construction jig, and a foundation construction method for confirming the center position of a column supported by an anchor bolt. [Background technology]

[0002] Conventionally, an anchor hanging jig has been known that is installed on top of a foundation formwork and used to embed multiple anchor bolts in the foundation concrete with some of them protruding when constructing the foundation of a building (a building made of reinforced concrete). Specifically, the anchor hanging jig is installed on the upper surface of the foundation formwork and is mainly composed of an anchor ruler that positions the anchor bolt in the horizontal direction, and an anchor height adjustment member that extends a long length in the vertical direction, connects the anchor ruler to the anchor bolt, and is attached in a state where the height position of the anchor bolt relative to the anchor ruler can be changed (for example, see Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-057408 A [Patent Document 2] JP 2004-211480 A Summary of the Invention [Problem to be solved by the invention]

[0004] When constructing the foundations of a building, there was a demand for a technology that could easily confirm the center position of a column (column base) supported by multiple anchor bolts. To explain in more detail, in order to connect a column (column base) to the foundation of a building, multiple anchor bolts are embedded in the foundation concrete with protruding bolts, and a column support (shear metal fitting) is installed partially embedded in the foundation concrete before the poured foundation concrete hardens. By installing this column support, even if a shear force is applied to the column base from the brace, the column support will support the foundation, making it possible to efficiently transmit the shear force to the foundation. In this case, in order to vertically connect the pillar to the foundation, it is necessary to install the pillar support at the center position of the pillar. Therefore, a technology for easily confirming the center position of the pillar has been required.

[0005] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a position confirmation tool, a foundation construction tool, and a foundation construction method that make it possible to easily confirm the center position of a pillar when constructing the foundation of a building. Another object of the present invention is to provide a position confirmation jig, a foundation construction jig, and a foundation construction method that enable easy installation of a column support (shear hardware) at the part of the foundation concrete that will be the core position of the column. [Means for solving the problem]

[0006] The above problem is solved by the present invention. Foundation construction jig According to the present invention, an anchor hanging jig for embedding a plurality of anchor bolts in a protruding state in foundation concrete is disclosed. and the anchor hanging jig a position confirmation jig for confirming the center position of a column supported by the plurality of anchor bolts, which is attached to the upper part of the A foundation construction jig for constructing a foundation of a building, comprising: And, The anchor hanging jig is installed on the upper part of the foundation formwork and has an anchor ruler for positioning the anchor bolt in the horizontal direction, and an anchor height adjustment member that extends long in the vertical direction, connects the anchor ruler and the anchor bolt, and is attached in a state in which the height position of the anchor bolt can be changed relative to the anchor ruler. The position confirmation jig is a first extension portion that passes through a portion that is a center position of the pillar and extends so as to connect a first anchor bolt and a second anchor bolt of the plurality of anchor bolts in a top view, and a second extension portion that is connected to the first extension portion at the portion that is a center position of the pillar, extends in a direction intersecting the extension direction of the first extension portion, and extends so as to connect the first extension portion and a third anchor bolt in a top view. Yes , The anchor is supported by the upper end portions of the anchor height adjustment members attached to the first anchor bolt, the second anchor bolt, and the third anchor bolt, and is disposed at a position higher than the anchor ruler. This problem is solved by: With the above configuration, it is possible to easily check the center position of the pillar when constructing the foundation of a building. Foundation construction jig It is possible to achieve this. In detail, the position confirmation jig includes the first extension portion and the second extension portion, and the connecting portion between the first extension portion and the second extension portion is the center position of the pillar. Therefore, by recognizing the position of the connecting portion, the center position of the pillar can be easily confirmed. In addition, since the position confirmation jig extends to connect multiple anchor bolts when viewed from above, it is possible to easily confirm the position (horizontal position) of each anchor bolt and its relative position (relative distance) to the center position of the column. In addition, since the position confirmation jig is supported at three points by at least three anchor bolts, the position confirmation jig can be stably attached.

[0007] In this case, it is preferable that the position confirmation jig is made of a flat plate body and is positioned above the portion of the anchor hanging jig that is mounted on the upper surface of the foundation formwork. With the above configuration, a space (gap) can be formed between the plate-shaped position confirmation jig and the anchor hanging jig in the vertical direction. By using this space, for example, a column support (shear hardware) can be easily installed on the foundation concrete. In other words, the column support can be installed without interfering with other components. In addition, by using the position confirmation jig, the column support can be easily installed at the part of the foundation concrete that will be the core position of the column.

[0008] In this case, the position confirmation jig preferably comprises a flat position confirmation plate having the first extension portion and the second extension portion, and a plumb bob extending vertically downward from a portion of the position confirmation plate that is the core position of the pillar. As described above, since the position confirmation jig further includes a plumb bob, the center position of the pillar can be confirmed more easily. Also, by using the plumb bob as a marker, the pillar support (shear hardware) can be installed more easily at a specified position on the foundation concrete.

[0010] In this case, the anchor ruler has a frame-shaped anchor support portion that supports the multiple anchor height adjustment members, and the position confirmation jig includes a position confirmation plate having the first extension portion and the second extension portion, and a plumb bob provided on a portion of the position confirmation plate that is the core position of the pillar, and the plumb bob passes through the frame of the anchor support portion and extends vertically downward. With the above-described configuration, the pillar support (shear hardware) can be easily installed at a predetermined position on the foundation concrete using the plumb bob as a marker. In addition, the pillar support can be installed by passing it through the frame of the anchor ruler (anchor support part). As a result, the pillar support can be installed along the plumb bob, allowing the pillar support to be installed with high precision.

[0011] The problem is also solved by a method for constructing a foundation for a building using an anchor hanging jig for embedding multiple anchor bolts in a protruding state and a position confirmation jig for confirming the center position of a column supported by the multiple anchor bolts, the method including: a formwork assembly process for assembling a formwork for a foundation; a jig installation process for installing the anchor hanging jig on the upper part of the formwork for the foundation; an anchor installation process for assembling the anchor bolts to the anchor hanging jig so as to suspend them; and a jig installation process for installing the position confirmation jig on the upper part of the anchor hanging jig. A concrete pouring process for pouring foundation concrete into the foundation formwork; and a column support installation process for installing a column support for supporting the column on the poured foundation concrete in a state where the column support is partially embedded in the foundation concrete. The jig mounting step includes: The position confirmation plate has a flat shape, and a plumb bob extending vertically downward from a portion of the position confirmation plate that is the center position of the pillar. The position confirmation jig is attached so that it passes through the portion that is to be the center position of the column and is supported by the first anchor bolt, the second anchor bolt, and the third anchor bolt in a top view. In the column support installation step, the column support is installed directly below the plumb bob. The above-mentioned problems are also solved by a foundation construction method characterized by the above. With the above-mentioned configuration, the center position of the pillar can be more easily confirmed by using the plumb bob as a marker. Also, since the pillar support can be installed along the plumb bob, the pillar support can be installed with high precision. Effect of the Invention

[0013] According to the position confirmation jig, foundation construction jig, and foundation construction method of the present invention, it is possible to easily confirm the center position of a column when constructing the foundation of a building. In addition, it becomes possible to easily install column supports (shear hardware) at the core position of the columns on the foundation concrete. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a perspective view showing the foundation construction jig, illustrating a state in which an anchor bolt is assembled to the anchor hanging jig. [Diagram 2] 2 is an enlarged view of a main portion of FIG. 1, showing a state in which a position confirmation jig is attached to the anchor hanging jig; FIG. [Diagram 3] FIG. 2 is an exploded perspective view showing an anchor hanging jig (anchor ruler, anchor height adjustment member) and an anchor bolt. [Figure 4] FIG. 4 is an assembled perspective view of FIG. [Diagram 5] FIG. 2 is a top view showing an anchor hanging jig and a position confirmation jig. [Figure 6A] FIG. 2 is a perspective view showing a state in which an anchor bolt is assembled to the anchor hanging jig. [Figure 6B] FIG. 2 is a perspective view showing the state after foundation concrete has been poured. [Figure 6C] This is a perspective view showing the state in which the column support is installed on the foundation concrete. [Figure 6D] FIG. 2 is a perspective view showing the state in which the foundation construction jig has been removed. [Figure 7] This is a process diagram showing a method for constructing the foundation of a building. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. This embodiment relates to an invention of a "position confirmation jig" that is attached to the top of an anchor hanging jig for embedding multiple anchor bolts in a protruding state in foundation concrete, and that confirms the center position of a column supported by multiple anchor bolts. The invention also relates to an invention for a "foundation construction jig" equipped with said position confirmation jig, and a "foundation construction method" using said foundation construction jig.

[0016] <Foundation construction jig> The foundation construction jig 1 of this embodiment, as shown in Figures 1 and 2, is a jig used when constructing the foundation of a reinforced concrete building, for example, a jig used when constructing a foundation using the high base method (exposed fixed column base method). Specifically, the foundation construction jig 1 is used when pouring foundation concrete and is mainly composed of a foundation formwork 10 assembled to match the shape of the foundation, an anchor hanging jig 20 erected on top of the foundation formwork 10 and used to embed multiple anchor bolts F2 in the foundation concrete with some of them protruding, and a position confirmation jig 30 attached to the top of the anchor hanging jig 20 and used to confirm the center position of the column (column base).

[0017] As shown in FIG. 1, embedded inside the foundation are a plate-shaped anchor support F1 that is installed on the foundation ground, a plurality of anchor bolts F2 that are supported by the anchor support F1 and are used to connect the foundation and the column (column base), and reinforcing bar units (column-type reinforcing bar units) (not shown) that are supported by the anchor support F1 and are arranged so as to surround the plurality of anchor bolts F2. Additionally, inside the foundation, as shown in FIG. 6C, before the poured foundation concrete F4 hardens, the column support F3 (shear metal fitting) is installed in a partially buried state on the foundation concrete F4.

[0018] As shown in FIG. 1, the anchor support F1 comprises a plate-shaped support base F1a that is installed at a predetermined position on the foundation ground, a plurality of anchor support parts F1b that are provided on the support base F1a and support the anchor bolts F2 from below, and a plurality of reinforcing bar support parts F1c that are provided on the support base F1a and support the reinforcing bar units from the sides and below. An engagement portion is formed at the upper end of the anchor support portion F1b, which is adapted to detachably engage with an engaged portion provided at the lower end of the anchor bolt F2. The anchor support parts F1b and the reinforcing bar support parts F1c are provided at a predetermined interval on the outer edge part of the support base F1a. More specifically, the anchor support parts F1b and the reinforcing bar support parts F1c are arranged alternately.

[0019] As shown in Figs. 1 and 3, the anchor bolt F2 is mainly composed of an anchor body portion F2a that is long in the vertical direction and forms the main body of the anchor bolt F2, an anchor thread portion F2b that extends upward continuously from the anchor body portion F2a, and a disk-shaped anchor fixing portion F2c that is provided at the lower end portion of the anchor body portion F2a. As shown in FIG. 6C, the column support F3 is mainly composed of a plate-shaped support plate F3a that is installed on the portion of the foundation concrete F4 that will be the core position of the column, a frame-shaped connecting portion F3b that is arranged to protrude upward from above the support plate F3a and connects to the lower end (base plate) of the column, an axial connecting portion F3c that is arranged inside the frame-shaped connecting portion F3b, and an embedded portion F3d that protrudes downward from the bottom surface of the support plate F3a and is embedded in the foundation concrete F4.

[0020] In the above configuration, after the foundation construction is completed, the anchor bolts F2 and the column support F3 are fixed in a state where they partially protrude above the foundation concrete F4, as shown in Fig. 6D. Then, a base plate provided at the lower end of the column (column base) is connected to the anchor bolts F2 and the column support F3, and the column can be erected vertically.

[0021] As shown in FIG. 1, the foundation formwork 10 is provided so as to face both sides in the width direction of the foundation (space that will become the foundation) and is a formwork disposed along the extension direction of the foundation. An anchor hanging jig 20 (anchor ruler 21) is attached to the upper surface of the assembled foundation formwork 10 along the extension direction of the foundation. In addition, part of the foundation formwork 10 is omitted in FIG.

[0022] As shown in Figures 1 to 4, the anchor hanging jig 20 is installed on the upper surface of the foundation formwork 10 (specifically, the foundation formworks 10A, 10B) and includes an anchor ruler 21 for positioning the anchor bolt F2 in the horizontal direction, and an anchor height adjustment member 22 that extends a long length in the vertical direction, connects the anchor ruler 21 and the anchor bolt F2, and is attached in a state where the height position of the anchor bolt F2 can be changed relative to the anchor ruler 21.

[0023] As shown in Figs. 1 and 2, the anchor ruler 21 is made of a frame-like body made up of flat plates having a predetermined width, and is fixed to the upper surface of the foundation formwork 10 using fastening members. Specifically, the anchor ruler 21 has a frame-shaped formwork fixing portion 21a that is fixed to the upper surface of the foundation formwork 10, a frame-shaped anchor support portion 21b that is positioned more inward than the formwork fixing portion 21a and supports a plurality of anchor height adjustment members 22, and a plurality of connecting portions 21c that connect the formwork fixing portion 21a and the anchor support portion 21b. The anchor support portion 21b has a rectangular frame shape, and assembly holes 21d for assembling the anchor height adjustment members 22 are formed in the four corners of the anchor support portion 21b.

[0024] As shown in Figures 3 and 4, the anchor height adjustment member 22 is mainly composed of a long bolt 22a that extends in the vertical direction and passes through the anchor ruler 21 (assembly hole 21d), clamping nuts 22b and 22c that are screwed into the long bolt 22a and clamp the anchor ruler 21 in the vertical direction, and a height adjustment nut 22d (long nut) that is screwed into the long bolt 22a from the bottom and extends in the vertical direction. Furthermore, the anchor threaded portion F2b of the anchor bolt F2 is screwed into the lower portion of the height adjustment nut 22d, and the height adjustment nut 22d and the anchor bolt F2 are integrally connected.

[0025] In the above configuration, the anchor height adjustment member 22 can change the height position of the anchor bolt F2 relative to the anchor ruler 21 by adjusting the screwing position of the height adjustment nut 22d relative to the long bolt 22a.

[0026] As shown in Figs. 2 and 5, the position checking jig 30 is attached to the upper ends of the multiple long bolts 22a of the anchor hanging jig 20, and is a jig for checking the center position of the pillar. Specifically, the position confirmation jig 30 comprises a flat position confirmation plate 31 and a plumb bob 32 extending vertically downward from a portion of the position confirmation plate 31 that is the core position of the pillar. The position checking jig 30 is supported by support nuts 33 attached to the upper ends of the long bolts 22a, respectively. Therefore, by finely adjusting the height of each support nut 33, the position checking jig 30 can be easily leveled.

[0027] As shown in FIGS. 2 and 5, the position confirmation plate 31 is made of a T-shaped plate body, and is disposed above the anchor ruler 21 in a floating state. The position confirmation plate 31 is equipped with a first extension portion 31a that passes through a portion that is the core position of the pillar and extends so as to connect the first anchor bolt F2A and the second anchor bolt F2B of the multiple anchor bolts F2 in top view, and a second extension portion 31b that is connected to the first extension portion 31a at the portion that is the core position of the pillar, extends in a direction intersecting the extension direction of the first extension portion 31a, and extends so as to connect the first extension portion 31a and the third anchor bolt F2C in top view.

[0028] More specifically, the first extending portion 31a extends linearly so as to connect the first anchor bolt F2A and the second anchor bolt F2B that are diagonally positioned among the multiple anchor bolts F2 in top view. The second extending portion 31b extends in a direction perpendicular to the first extending portion, and extends so as to connect the first anchor bolt F2A and the second anchor bolt F2B to the adjacent third anchor bolt F2C in top view. In the position confirmation plate 31, the connecting portion of the first extending portion 31a and the second extending portion 31b is the center portion (central portion) of the position confirmation plate 31, and is also the portion that becomes the core position of the pillar.

[0029] At positions in the first extension portion 31a corresponding to the first anchor bolt F2A and the second anchor bolt F2B, assembly holes 31c are formed through which the long bolts 22a are inserted and supported by support nuts 33 screwed onto the long bolts 22a. Similarly, an assembly hole 31c is formed in the second extending portion 31b at a position corresponding to the third anchor bolt F2C. These assembly holes 31 c are disposed at positions equidistant from the center of the position confirmation plate 31 .

[0030] As shown in Figures 2 and 6A-C, the plumb bob 32 is attached to a part (center part) of the position confirmation plate 31 that is the core position of the pillar, passes through the frame of the anchor ruler 21 (anchor support part 21b), and extends vertically downward. Specifically, the plumb bob 32 comprises a cylindrical support 32a installed on the upper surface of the position confirmation plate 31, a plumb bob string 32b wrapped around the outer peripheral surface of the support 32a, extending from the support 32a, passing through an insertion hole 31d formed at the center of the position confirmation plate 31, and extending downward, and a cone-shaped pendulum 32c attached to the extending end of the plumb bob string 32b.

[0031] The support 32a is made of, for example, a permanent magnet, and can be removably fixed to a predetermined position of the position confirmation plate 31.

[0032] As described above, it is possible to easily confirm the center position of the pillar by using the position confirmation plate 31 and the plumb bob 32. It is also possible to easily install the pillar support F3 (shear hardware) at the part that is to be the center position of the pillar on the foundation concrete F4.

[0033] In the above configuration, the position confirmation plate 31 is made of a T-shaped plate body, and is disposed at a position above the anchor ruler 21, as shown in FIG. Therefore, a space (gap) can be formed between the position confirmation plate 31 and the anchor hanging jig 20 (anchor ruler 21) in the vertical direction. By using this space, the pillar support F3 can be easily installed on the foundation concrete F4, as shown in Fig. 6C. In other words, the pillar support F3 can be installed without interfering with other members.

[0034] In the above configuration, the position confirmation plate 31 is attached to the upper end of the long bolt 22a of the anchor ruler 21, as shown in FIG. Therefore, a larger space (gap) can be formed between the position confirmation plate 31 and the anchor ruler 21. In addition, when using the position confirmation plate 31 to measure the horizontal distance between the center position of the pillar and the position of the anchor bolt, it is possible to prevent, for example, the tape measure from interfering with the long bolt 22a and distorting the measurement result. It is preferable that the upper surface of the position confirmation plate 31 and the upper surface of the long bolt 22a are approximately flush with each other.

[0035] In the above configuration, as shown in FIG. 5, the position confirmation plate 31 is formed so as to be narrower than the anchor ruler 21 (anchor support portion 21b). Therefore, a larger space (gap) can be formed between the position confirmation plate 31 and the anchor ruler 21. Since the position confirmation plate 31 does not require as much rigidity as other foundation construction tools, it is designed to have as simple a shape as possible.

[0036] In the above configuration, as shown in Figures 2 and 6A-C, the position confirmation jig 30 is equipped with a plumb bob 32, which passes through the frame of the anchor ruler 21 (anchor support portion 21b) and extends vertically downward. Therefore, the pillar support F3 (shear hardware) can be easily installed at a predetermined position on the foundation concrete F4 using the plumb bob 32 as a guide. In particular, since the pillar support F3 can be installed along the plumb bob 32, the pillar support F3 can be installed with high precision.

[0037] <Foundation construction method> Next, a method for constructing a building foundation will be described with reference to FIG. First, as shown in FIG. 1, the process starts with an "anchor support installation process" (step S1) in which a foundation worker installs an anchor support F1 on the foundation ground and fixes it using a fixing member (e.g., a concrete nail) (not shown). At this time, by using a marking line drawn beforehand on the foundation ground as a guide, the anchor support F1 can be installed with high precision at a predetermined position (pillar erection position) on the foundation ground.

[0038] Thereafter, a worker performs an "anchor installation process" in which the anchor bolt F2 is installed on the anchor support F1 (step S2), and further performs a "reinforcing bar assembly process" in which a reinforcing bar unit (not shown) is assembled (step S3). At this time, it is preferable to assemble a reinforcing bar unit (not shown) so as to hold the installed anchor bolts F2 from the side. The order of steps S2 and S3 may be reversed. In that case, it is preferable to install the reinforcing bar unit and then install the anchor bolts F2 from above in the area surrounded by the reinforcing bar unit.

[0039] Thereafter, as shown in FIG. 1, workers perform a "formwork assembly process" in which they assemble foundation formworks 10A, 10B facing each other on both sides of the width of the space that will form the foundation (step S4), and then perform a "jig erection process" in which they erect an anchor hanging jig 20 on top of the foundation formwork 10 (step S5).

[0040] Thereafter, as shown in Figs. 1, 3 and 4, an operator performs an "anchor assembling process" in which the anchor bolt F2 is assembled so as to be suspended from the anchor hanging jig 20 (step S6). At this time, the height position of the anchor bolt F2 relative to the anchor ruler 21 can be changed by adjusting the screwing position of the height adjustment nut 22d relative to the long bolt 22a. The anchor bolt F2 is positioned by carrying out the above steps S1 to S6. Specifically, the anchor bolt F2 can be positioned in the horizontal direction by the anchor support F1 and the anchor ruler 21. In addition, the anchor bolt F2 can be positioned in the height direction by the anchor height adjustment member 22. The anchor support portion F1b of the anchor support F1 may be configured to be height adjustable using, for example, a bolt and nut mechanism, so that the initial height position of the anchor bolt F2 can be adjusted.

[0041] Thereafter, as shown in Figs. 2 and 6A, a worker performs a "jig attachment step" in which the position confirmation jig 30 is attached to the upper part of the anchor hanging jig 20 (step S7). At this time, the position checking jig 30 is attached so that it passes through the portion that will be the core position of the pillar and is supported by the first anchor bolt F2A, the second anchor bolt F2B, and the third anchor bolt F2C in top view. More specifically, a position confirmation plate 31 is attached to the upper end of the anchor height adjustment member 22, and a plumb bob 32 is attached so as to hang down from the center of the position confirmation plate 31.

[0042] 6B and 6C, a worker performs a "concrete pouring process" in which the foundation concrete F4 is poured into the foundation formwork 10 (step S8). Then, before the poured foundation concrete F4 hardens, a "pillar support installation process" is performed in which the pillar support F3 (shear metal fitting) is installed in a partially buried state on the foundation concrete F4 (step S9). In the process of installing the pillar support F3, the plumb bob 32 (pendulum 32c) is used as a landmark, and the pillar support F3 is installed directly below the plumb bob 32. In addition, the pillar support F3 (shear metal fitting) is installed in a state where it is partially buried in the foundation concrete F4. When the above step S9 is completed, the series of work steps is completed. After the above-mentioned work steps are completed, the foundation construction jig 1 is removed (see FIG. 6D).

[0043] The above foundation construction method makes it possible to easily check the center position of the pillars when constructing the foundation of a building. In addition, it becomes possible to easily install column supports (shear hardware) at the core position of the columns on the foundation concrete.

[0044] In the above foundation construction method, the order of each work step may be changed as appropriate. For example, the "formwork assembly process" in S4 and the "jig installation process" in S5 may be performed before the "support fixing process" in S1, the "anchor installation process" in S2, and the "rebar assembly process" in S3. In that case, the "anchor installation process" in S2 and the "anchor installation process" in S6 may be performed simultaneously. Also, for example, the position confirmation jig 30 may be pre-assembled to the anchor hanging jig 20. That is, the anchor hanging jig 20 with the position confirmation jig 30 may be erected in the "jig erection step" of S5. In that case, the "jig attachment step" of S7 can be omitted. Also, for example, the anchor support F1 may be unnecessary, in which case the "support fixing step" S1 can be omitted.

[0045] <Other embodiments> In the above embodiment, as shown in FIG. 2, the position confirmation jig 30 includes the position confirmation plate 31 and the plumb bob 32, but this is not particularly limited and can be modified. For example, the position confirmation jig 30 may be configured to include only the position confirmation plate 31, without the plumb bob 32.

[0046] In the above embodiment, as shown in FIG. 2, the position confirmation plate 31 is formed as a flat plate body, but this is not particularly limited and can be modified. That is, the position confirmation jig 30 (position confirmation plate 31) preferably has a shape as compact as possible, but may be a position confirmation member having a predetermined shape.

[0047] In the above embodiment, as shown in Figures 2 and 5, the position confirmation jig 30 is T-shaped and supported at three points by three anchor bolts F2 (strictly speaking, three long bolts 22a), but this can be modified without any particular limitation. For example, the position confirmation jig 30 may be cross-shaped and supported at four points by four anchor bolts F2, in which case the position confirmation jig 30 can be more stably attached. Alternatively, the position confirmation jig 30 may be supported at two points by two anchor bolts F2. Even in this case, a space (gap) can be formed between the position confirmation jig 30 and the anchor hanging jig 20 in the up-down direction.

[0048] In the above embodiment, as shown in Figs. 3 and 4, the anchor height adjustment member 22 is provided with a "height adjustment means" composed of the long bolt 22a and the height adjustment nut 22d, but the height adjustment means is not particularly limited and can be changed. For example, a known height adjustment means using a mechanical structure may be used.

[0049] In the above embodiment, the position confirmation jig, the foundation construction jig, and the foundation construction method according to the present invention have been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and is not intended to limit the present invention. The present invention can be modified or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof. [Explanation of symbols]

[0050] F Basics F1 Anchor Support F1a Support Base F1b Anchor support F1c Reinforcement bar support F2 Anchor bolt F2A 1st anchor bolt F2B Second anchor bolt F2C 3rd anchor bolt F2a Anchor body F2b Anchor screw part F2c Anchor fixing part F3 Column support (shear hardware) F3a Support Plate F3b Frame-like connection part F3c shaft connection part F3d Buried part F4 Foundation concrete 1 Foundation construction jig 10 (10A, 10B) Foundation formwork 20 Anchor hanging fixture 21 Anchor Ruler 21a Formwork fixing part 21b Anchor support 21c Connecting part 21d Mounting hole 22 Anchor height adjustment member 22a Long bolt 22b, 22c Clamping nut 22d Height adjustment nut 30 Position Check Jig 31 Position confirmation plate (position confirmation member) 31a 1st extension part 31b Second extension 31c Mounting hole 31d Through hole 32 Plumb 32a Support 32b Plumb line 32c Pendulum 33 Support nut

Claims

1. An anchor hanging tool for embedding a plurality of anchor bolts in a protruding state in foundation concrete; A position confirmation jig attached to an upper portion of the anchor hanging jig for confirming a center position of a column supported by the plurality of anchor bolts, comprising: The anchor hanging jig is An anchor ruler that is installed on the upper part of the foundation formwork and that is used to position the anchor bolt in a horizontal direction; an anchor height adjustment member that extends long in the vertical direction, connects the anchor ruler and the anchor bolt, and is attached in a state in which a height position of the anchor bolt can be changed relative to the anchor ruler; The position confirmation jig is a first extension portion that passes through a portion that is a center position of the column and extends so as to connect a first anchor bolt and a second anchor bolt among the plurality of anchor bolts in a top view; a second extension portion that is connected to the first extension portion at a portion that is a core position of the column, extends in a direction intersecting the extension direction of the first extension portion, and extends so as to connect the first extension portion and a third anchor bolt in a top view, supported by upper ends of the anchor height adjustment members attached to the first anchor bolt, the second anchor bolt, and the third anchor bolt, A foundation construction jig characterized by being positioned above the anchor ruler.

2. The position confirmation jig is It consists of a flat plate body, 2. The foundation construction jig according to claim 1, wherein the anchor hanging jig is disposed at a position above a portion of the anchor hanging jig that is installed on the upper surface of the foundation formwork.

3. The position confirmation jig is a flat position confirmation plate having the first extension portion and the second extension portion; The foundation construction jig according to claim 1 or 2, characterized in that it is further provided with a plumb bob extending vertically downward from a portion of the position confirmation plate that is the center position of the pillar.

4. The anchor ruler has a frame-shaped anchor support portion that supports the plurality of anchor height adjustment members, The position confirmation tool includes a position confirmation plate having the first extension portion and the second extension portion, and a plumb bob provided on a portion of the position confirmation plate that is a core position of the pillar, The foundation construction jig according to any one of claims 1 to 3, characterized in that the plumb bob passes through a frame of the anchor support portion and extends vertically downward.

5. A foundation construction method for a building using an anchor hanging jig for embedding a plurality of anchor bolts in a protruding state, and a position confirmation jig for confirming the center position of a column supported by the plurality of anchor bolts, comprising: a formwork assembly process for assembling a foundation formwork; a jig installation process for installing the anchor hanging jig on the upper part of the foundation formwork; an anchor assembling process of assembling the anchor bolt to the anchor hanging jig so as to hang it thereon; a jig attachment process of attaching the position confirmation jig to an upper portion of the anchor hanging jig; A concrete pouring process of pouring foundation concrete into the foundation formwork; A column support installation process is included in which a column support for supporting the column is installed on the poured foundation concrete in a state where the column support is partially embedded in the foundation concrete, In the jig attachment step, the position confirmation jig, which has a flat position confirmation plate and a plumb bob extending vertically downward from a portion of the position confirmation plate that is to be the center position of the pillar, is attached so as to pass through the portion that is to be the center position of the pillar and be supported by the first anchor bolt, the second anchor bolt, and the third anchor bolt in a top view; A foundation construction method, characterized in that in the column support installation step, the column support is installed directly below the plumb bob.

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